Tag Archive: diseases

Top Ten Most Disgusting Medical Therapies

If you thought 'gross' and 'disgusting' were adjectives that could only describe medical conditions, think again. Over the years, we in the medical field have developed our fair share of revolting medical therapies. After the great success of The Top Ten Most Disgusting Medical Conditions, I decided I needed to also divulge my Top Ten Most Disgusting Medical Therapies.  The idea for this article was born while working with a gastroenterologist in the hospital.  We were discussing a patient with clostridium difiicile (nicknamed C-diff), a terrible infection of the colon. The medical field has developed some great therapies for C-diff including antibiotics and, when necessary, surgery. Unfortunately, the infection is notoriously difficult to treat and sometimes the medicines do not help.  As we were sitting in the hospital discussing a patient the gastroenterologist asked me a shocking question.

"So, do you think it is time for a fecal transplant?"

"A what !?" I said.

"A fecal transplant. You know, implanting another person's feces into this patient's colon to treat the C-diff?"

I thought I was going to throw up right there in the hospital. I was sure he was kidding, he had to be, right? But there he sat, totally serious and staring at me. He was actually shocked and disappointed that I had not thought of it myself. How had I never heard of this before?  Fecal transplant! Gross.

Well, as it turns out, fecal transplant is a very well researched and well known therapy for C-diff infections. The theory behind its use is also very sound and well documented. As I progressed further in my training I began to mention it as a possible therapy for late stage C-diff infections without even thinking about how gross it actually is.  And that folks, is how really really gross things become so accepted in medicine: desensitization.

And now, the Top Ten Most Disgusting Medical Therapies
Note: All of the procedures are STILL IN USE!

 

10. BLOODLETTING

The art of bleeding the body for medicinal purposes is one of the oldest techniques in the world.  The practice began more than 2,000 years ago independently in many parts of Asia, Africa, and Europe. It was initially thought of as a way to balance the humors in the body. Humorism is the idea that the body is made up of four distinct body fluids, blood being one of the four. Illness, then, was the misalignment of these fluids into abnormal proportions. Therefore, relieving the body of too much blood was one way of realigning the humors and ridding the body of illness.  The practice of bloodletting was widely practiced around the world until one hundred years ago when more sophisticated science began to trump humorism. However, bloodletting has not disappeared. Doctors still use the practice in a few specific circumstances, but to distance the current therapy from humorism bloodletting, we have changed the name. We know refer to bleeding the body for medical reasons as "Therapeutic Phlebotomy". There are a few blood disorders that result in too many red blood cells. These illnesses (hemochromocytosis, and polycemia vera as examples) lead to such an over-abundance of red blood cells that the body can start to shut down. The best therapy we have for these disease, naturally, is to bleed the patient until they have a normal amount of blood.  Perhaps modern medicine is not too different from Humorism!

 

9. LEECH THERAPY

Not only is leech therapy still in use, it is in vogue and becoming quite popular.   Like blood letting, the art of leech therapy has evolved significantly and is quite different from its roots thousands of years ago. However, at the core the principles are the same: leeches suck blood.  Historically, leeches were used  for all sorts of things that have little scientific evidence and are no longer acceptable including treating skin diseases, back pain, and migraine headaches. They were a very important tool in the art of bloodletting, discussed above, for obvious reasons. In fact, in the 1800's the use of medicinal leeches became so popular that the species Hirudo medicinalis (the most commonly used medicinal leech) was nearly wiped out.  We have recently discovered that the persistent blood sucking of leeches is still medically useful.  The field of microsurgery is rapidly evolving and progressing. Today, we can take pieces of skin and tissue from one place on the body and sew the blood vessels into other places on the body.  However, in order for the new reconstructions to survive they need adequate blood flow. Sometimes the blood begins to flow to the new skin on its own. For those instances where we need to help the blood flow to the new skin, we attach on leeches to suck the blood through. Beautiful.

 

8. TREPANATION

 

 

 

 

 

 

 

 

 

 

 

 

 

Trepanation is simple the practice of drilling a hole into the brain.  Incredibly, this is the oldest surgical procedure for which we have archeological evidence. Scientists have found hundreds of skeletons from 6,000 BC with trepanation holes in the the skull.  For thousands of years drilling a hole into another individual's head was the best available therapy for anything related to the brain: seizures, migraines, psychiatric illness, confusion, etc. etc. The most incredible part of the trepanation story is that it was widespread all over the world, from Ice Age wanderers, to the Incas in America, to the ancient Chinese: we have found trepanation skulls for all these groups.  Don't forget, anesthesia was invented about 150 years ago!  Thankfully, drilling random holes in skulls is mostly a thing of the past. However, "trepanation" is still used to relieve pressure inside the skull during emergencies, although now we call it a "craniotomy". This is the procedure of choice if someone is bleeding inside their skull (usually the result of a traumatic accident). If the blood is not released it can cause permanent brain damage, so a hole is drilled to relieve the pressure inside the skull. It may also surprise you that the art of skull-hole drilling for random medical illnesses still occurs today (dubbed: voluntary trepanation)

 

7. Tooth-in-Eye Surgery

Actually, this is a very new therapy, performed in the US for the first time just a couple of years ago. The procedure, also known as Osteo-odonto-keratoprosthesis, is a last resort surgery for individuals with diseased corneas.  When a cornea becomes damaged and cloudy, the eye can no longer see through it and people go blind. There are other surgeries to treat cornea disease, but when these do not work and the eye becomes scarred, the Tooth-in-Eye surgery is a great new tool.  Procedure: The scarred area of an eye and eyelid are removed and are replaced with the lining of your mouth (yes, your cheek mucosa are implanted into your eye). A tooth is then removed. A hole is drilled into the tooth and a small lens is placed inside.  The tooth and eyepiece are then implanted into the patient's cheek for a period of time so that they can develop a blood supply. Once the tooth and lens have a blood supply they are removed from the cheek. A hole is made in the cheek mucosa which is now covering the eye and the bone and lens are placed inside.  In the end, the patients eye is made up of inner cheek skin. This mucosal layer has a hole in the from where the pupil used to be and the bone/lens allow light to be reflected to the back of the eye, allowing the patient to see again. Awesome.

 

6. ABSCESS INCISION AND DRAINAGE

 

 

One of the most rewarding experiences during medical training is learning how to do an I&D (Incision and Drainage). It is nothing more than surgical zit popping.  Abscesses form when an infection walls itself off from the rest of the body. When this happens, copious amounts of dead tissue, pus, and blood build up in this cavity and have nowhere to go. The result is a red and painful pus ball under the skin. The therapy is simple, open up the cavity and let the pus drain out. The procedure is painful to the patient for a few moments but provides immediate relief afterward. If you are wondering what could be gross about this…you have never seen one. The puss smells awful. Abscesses form in the nether-regions of the body (arm pit, groin, anus, gums, etc). And, often the abscess are enormous, high pressure pockets that explode as soon as a blade pierces them. Check out the video if you are interested….but beware, it is truly gross.

 

5. MAGGOT THERAPY

In the article "The Top Ten Most Disgusting Medical Diagnoses" I mentioned Myiasis (maggot infestation) as the absolute most disgusting diagnosis. The overwhelmingly revolting thing about myiasis is that the infestation is unknown until you move some tissue around only to see hundreds of maggots eating a patient's flesh. Maggot therapy is a little different, but works by the same principle: maggots feed on dead skin. So, if a patient has a chronic wound that is not healing there is bound to be dead skin in the wound. Dead skin quickly leads to infection if not cut out, or "debrided". These patients are in need of constant debridement in order to keep their wounds from becoming infected.  Behold, the grand entrance of the medical maggot! When used medically, maggots are always sterile and home grown. We only use specific species and keep a close eye on the wound from start to finish. But it still grosses me out.

 

4. LOBOTOMY

OK, I lied. Lobotomy is the only therapy on this list which is no longer in use. However, it did not fall out of favor entirely until 30 years ago and its inventor, Dr. Egas Moniz, won the Nobel prize for developing the surgery just 60 years ago (1949). Lobotomy was a simple procedure used to cure patients of psychiatric disease. The surgeon would take a long, thin nail (called an orbitoclast) and placed it next to the eye in the eye socket.  The surgeon would then take a mallet and pound on the nail until it broke the skull (think of an ice pick and a sledge hammer). The impact would break the eye socket and ram the nail into the front portion of the patient's brain. This process was repeated several times to "interrupt the connections between the front of the brain and the main processing centers of the brain."  The procedure was actually highly successful, nearly every patient was cured of their psychosis. Unfortunately for the patient's, nearly all of them were also left in vegetative state. Nevertheless, the procedure was popular for many years until anti-psychotic medications were discovered.  So, the next time you hear Tom Cruise tell everyone that anti-psychotic meds are evil, ask him if he would rather have a lobotomy.

 

3. HELMINTHIC THERAPY (a.k.a. "Hook Worm Therapy")

Up until 20 years ago, when someone traveled to another country and came back with 'worms' it was a terrible thing. That may not be the case any longer. Recently, researchers have found that parasitic worms have great medicinal qualities. Specifically, they are the world's best treatment for allergies and can successfully treat many autoimmune disorders including Crohn's Disease, ulcerative colitis, and inflammatory bowel disease. Undergoing helminthic therapy is as easy as taking a pill; you simply drink a glass full of live, parasitic worms. Once they have colonized in your body, they begin to work against the autoimmune diseases. The success rates in recent studies is actually very impressive. While there are a number of theoretical explanations for why the therapy works, the best evidence of their effectiveness is the the fact that in countries where most humans are colonized with parasitic worms, there is virtually no autoimmune disease.

 

2. ELECTRO-CONVULSIVE THERAPY (aka ECT or "Shock Therapy")

When I started medical school I was shocked to learn that "Shock Therapy" was still in widespread use around the entire world. ECT is used for a wide variety of psychiatric conditions including schizophrenia, depression, and severe bipolar disorders. To complete the procedure, electrodes are placed on the scalp, the patient is sedated, and the a series of high voltage shocks are applied to the brain.  Essentially, we induce a seizure in a willing person.  It is not like the old movies where the shock sends the patient's body into a convulsion, these days most patient's are temporarily paralyzed during the procedure.  However, though I know that it is effective, there is still something inside of me that feels uneasy about sending large amounts of electricity through the brain of an unconscious person.

 

1. FECAL TRANSPLANT

As my leading story alluded, fecal transplant is the real deal. It is an effective therapy for late-stage clostridium difficile (C-diff) infections. C-diff is an infection of the large intestine that usually occurs after using antibiotics.  It is a normal bacterium that lives in your gut and is usually kept in check by the other bugs that normally live there.  When a person takes antibiotics, the normal bacteria in the gut are often killed but C-diff is usually note affected by ordinary antibiotics. This gives C-diff free reign to take over your whole guy all for itself.  We have good medications against C-diff, but they do not always work. In theory, replacing the ordinary bacteria back into the gut should bring C-diff back into check. How can we do this? Easy. By taking the feces from a healthy patient with normal intestinal bacteria and transplanting it into the patient with C-diff.  So, don't get mad the next time you walk into a doctor's office and you really want an antibiotic and the doctor says "It looks like a viral infection, I don't think you need antibiotics." In reality you should thank your doctor, he/she is only trying to save you from having another person's feces transplanted into your backside.

 

HONORABLE MENTION (Just outside the Top Ten)

Tapeworms are known to colonize the gastrointestinal tract of human beings. They are notoriously difficult to get rid of because they use strong teeth to latch onto the intestinal wall once they are inside the gut.  The "Milk Bath" remedy is often cited as a great solution. Most clinicians and scientist will tell you that this therapy does not, or at least should not work. But that advice does not stop thousands of people around the world to continue practicing it, and openly reporting on its success.  Supposedly, when you are infected with tapeworms, there is a simple way to get the out of your body–a lure. If patients submerge their backsides into a bucket of milk, or sleep with their mouths open next to a bucket of milk, the tapeworms will crawl out, preferring fresh milk to human gut. If true, the migration would be very slow and the patient would have to endure the feeling of worms crawling out of their orifices for many hours.  Looking at that picture, I think I would rather stay colonized.

 

  • HIPPO SWEAT SUNSCREEN

Skin cancer is one of the most common cancers, and one of the most preventable.  Wearing good sunscreen greatly decreases your risk of skin cancer. So, what is the best sunscreen?  Recently, studies show that hippopotamus sweat might be the next big sunscreen breakthrough. The natural product does no damage to human skin, does not harm animals in its processing, and blocks nearly 100% of all UV rays.  Sound perfect?  That's because you haven't seen hippos sweat! This is not a clear, salty sweat like we have. Hippo sweat is referred to as a 'blood sweat' and is actually neither blood nor sweat, but a natural sunscreen. I really don't want skin cancer…but I don't know if I can put that stuff on my body.

 

  • INTRAVITREAL (EYE) INJECTION

This is probably the most common therapy on this entire list. Eye injections are used for everything from eye infections, to macular degeneration, to diabetic disease in the eyes. The procedure is done routinely in the offices of ophthalmologists around the world.  Unfortunately, if you are diagnosed with a disease that requires medical injections into your eye, you will likely need a series of at least 3 injections. The needles used for eye injections are small, and the area is numbed up very well: most patient's report not even feeling the stick. However, something about sticking a needle in an eye just seems wrong.

 

  • URINE THERAPY

The data are very limited, and I have never met a physician who endorses urine therapy. However, I can't find any information debunking the theory either. Urine has been used since Roman times for medical therapy for everything from infections to psychiatric illness. Many not in the medical field suggest that it has strong anti-cancer effects and many of us have heard that if you pee on your foot, you can cure athletes foot. None of these suggestions have much medical support, as urine is mostly made of water and electrolytes.  However, urine therapy is still used in modern medicine, just not human urine. Horse mares are known to pee out a large amount of estrogen. Pharmaceutical companies have realized this and now collect female horse urine, extract the estrogen, and sell it as an estrogen tablet.  Yummy.

 

  • ICHTHYOTHERAPY (a.k.a. "Fish Therapy)

    Doctor_fish

The garra rufa species (a small fish, nicknamed the "Doctor Fish") lives in rivers in Turkey and Iran.  For hundreds of years humans have known of their strange affection for abnormal skin. Individuals with skin rashes, skin infections, and skin growths often come to the region to let their feet soak in the water and let the Doctor Fish pick away their diseases. Recently, garra rufa fame has become more well known and the fish have been the subject of numerous medical experiments. Indeed, research is showing that they have some ability to pick away skin disorders of the feet including dermatitis and psoriasis. Those who have felt the healing power of the garra rufa say there is no pain involved, and that the experience is more relaxing than painful.

 

Morgellons: Real Skin Disease or Delusional Dermatology?

Morgellons Syndrome is described as a skin ‘infestation’ by small mites, or morgellons.  The ‘diagnosis’ is not accepted by mainstream medicine but has been widely publicized by media outlets and advocacy groups. Those who are believed to have morgellons complain of itchy skin, stinging and painful sensations, and the feeling of creeping and crawling underneath the skin. In many patients, there are persistent skin infections that do not heal properly. Some describe white plaques the form around chronic skin wounds. One of the unifying complaints, however, is the presence of small fibers erupting from the skin after the symptoms have been present for a few weeks.

Initial research into these complaints identified no unifying cause, no parasite, and no underlying cause. The lack of evidence for morgellons led most medical organizations, including the American Academy of Dermatology, to declare the the symptoms were not skin related at all, but were a delusion. The combination of symptoms, they say, follows a well known pattern that has been described in dermatology as Delusional Parasitosis: a disease that causes a healthy person to have a strong and incurable belief that their bodies are being overtaken by mites or bugs.  Interestingly, a PubMed search of all research that has been published on the subject (34 papers since 2006) identified no causative factor but did include titles with words such as: psychosis, hypnosis treatment, delusion, unexplained, antipsychotic-responsive, mysterious, web-based dissemination, contested, unknown etiology, and internet meme. [CLICK HERE TO SEE ALL 34 PAPERS]

Nevertheless, though the medical community has shunned the idea of morgellons, the diagnosis has lived on. A recent paper  published in PLoS One identified the epidemiology of 115 patients who were thought to have morgellons syndrome.  The paper found that 70% of these patients also complained of chronic fatigue, 59% had cognitive deficits, 50% tested positive for drugs, and 78% reported exposure to solvents. Quite the motley crew!  However, they did find some interesting results among this interesting group, see images below…

Microscopic image of a fiber taken from 'morgellons' patient

Skin lesions seen in patients enrolled in the PLoS One study

Something is certainly going on in those images.  Is it a delusion? Or is it a whole body infestation?

Conversion Disorder vs Factitious Disorder vs Malingering

Conversion disorder, factitious disorder, and malingering have one major characteristic in common: they represent conditions that are not ‘real’.  However, ‘real’ is a vague word and it is important to understand the differences between these conditions.  Properly diagnosing your patient with one of these psychiatric ailments will allow you to create appropriate plans of care for your patients.

1. Conversion Disorder: is a psychiatric condition that results in a neurological complaint or symptom, without any underlying neurological cause.  Patient’s may experience seizures (i.e. ‘pseudoseizures’), weakness, non-responsiveness, numbness, and even vision loss.  The symptoms are not intentional, the patient is not faking or intentionally creating his/her complaints, yet upon further investigation no biological explanation for the symptoms can be found.  The symptoms, therefore, are ‘real’ to the patient but are not caused by any ‘real’ pathology.  The current thought is that the symptoms are somehow caused by an overload of emotional stress in the body. The name “conversion disorder” comes from Sigmund Freud who stated that stress can cause a psychiatric ailment to ‘convert’ to a medical problem.  Do not fall into the trap, however, of many students/doctors/nurses who say the patient is ‘faking’.  While you may know that a patient complaining of sudden vision loss has a completely healthy eye without disease, the patient’s eye and brain are actually NOT processing any sight.  Alternatively, a case that I have seen a number of times, a patient with syncope from conversion disorder whose labs, tests, vital signs, and clinical status are completely normal will actually NOT respond to painful stimuli (sternal rub, nail bed pressure, supraorbital pressure) during an episode.  It is important to remember the unintentional nature of conversion disorder when discussing the condition with a patient.  To them it is REAL, even if to you it seems fake.

Studying for the Psychiatry Rotation?  Check out First Aid for the Psychiatry Clerkship

2. Factitious Disorder (a Somatoform Disorder): is a condition where patients intentionally fake disease, or intentionally cause disease in order to play the ‘patient role’.  The main distinction between this and conversion disorder is the intentional nature of factitious disorder. Often referred to a Munchausen Syndrome, factitious disorder is characterized by patients frequently feigning illness to obtain attention, sympathy, or other emotional feedback.  They achieve this goal through exaggerating symptoms, deliberately faking symptoms, or even intentionally creating real symptoms.  Patients have been known to contaminate their own body fluids, even injecting themselves with dirt, bacteria, or fecal matter in order to create illness that will then lead to primary emotional gain. A related disorder is known as Munchausen by Proxy, which is characterized by a person intentionally faking or causing illness in another (usually a child) in order to obtain the same emotional feedback.  Victims of Munchausen by Proxy are often children who return to the hospital time and time again with infections or other ‘ailments’ that are either fabricated or intentionally created by their caregiver.

3. Malingering: is the intentional faking or creating of illness in order to obtain secondary gain (e.g. workers compensation, disability payments, avoiding work or jail time, pain medication, etc.) Malingering is NOT a psychiatric illness; this is the first major distinction from the other two disorders. Malingering is an intentional abuse of the medical system to obtain personal benefit.  The difference between malingering and factitious disorder is the goal of the patient; malingerers abuse the system to obtain secondary gain while patients with factitious disorder attempt only to obtain emotional, or primary gain.  In simpler terms, the end goal of a malingerer usually involves monetary value, while the goals of patients with factitious disorder have no such value.

QUICK REVIEW:

  • Conversion Disorder: Unintentional, due to emotional stressors, no ‘gain’ to the patient
  • Factitious Disorder (Munchausen): Intentional, primary or ’emotional’ gain
  • Malingering: Intentional, secondary and often monetary gain

 

 

Top 10 Most Disgusting Medical Conditions

As a medical student and now as a resident, I feel quite comfortable with the day-to-day gross diagnoses in the hospital. In fact, until last week I was convinced that nothing phased me anymore. That was until a patient with myiasis walked into my hospital, and I nearly lost my lunch. The episode has made me think: what is the most disgusting diagnosis in medicine….is there anything more gross than myiasis? Well, after thinking about all the cases I have seen and looking at some gut wrenching images, I have come up with my Top Ten Most Disgusting Medical Conditions.

 
WARNING: THE IMAGES BELOW REPRESENT REAL MEDICAL PROBLEMS AND ARE EXPLICIT IN NATURE. DO NOT VIEW THESE IMAGES UNLESS YOU ARE PREPARED TO FEEL QUEASY.
 

1o. Hidradenitis Suppurativa:

A chronic inflammatory condition of the apocrine sweat glands, usually in the axilla (arm pit). It does not matter how many times you cut it out, it will always come back.

Archives of Dermatology


 

9. Fecaluria:

The passage of fecal matter through the urethra. The condition usually develops via a vesicointestinal fistula, or a connection between the bladder and the intestine.

Journal of RadioGraphics

8. Fecal Vomiting:

This can occur in very sick patients, usually due to a bowel obstruction or a gastrocolic fistula (connection between the stomach and the colon). No one wants to see a real picture of this…

 

7. Fulminant Human Papilloma Virus (HPV) Infection:

HPV causes most warts on our body, including the sexually transmitted forms. However, there is a rare genetic disese called Epidermodysplasia verruciformis which allows HPV to take over a person’s body. You may have heard of Dede Koswara, or “The Tree Man”, who suffered from this disorder, check out his story on ABCNews.

Note: I believe this disease is the same, or related to Keratosis Palmoplantaris…see image below

6. Cancrum Oris:

Also known as “Noma Disease”, this is a gangrenous infection that leads to destruction of the mouth and face. The disease is common in African youth.

5. Tapeworm (Cestoda):

Parasitic flatworms are not as uncommon as you might think. They live in your small intestine for years at a time, laying eggs and feasting off host blood and feces. One worm can go from egg to 15 foot long adult in only a few months. They can be contracted from eating under cooked meats, especially pork. One species, Taenia saginata, which infects cows and humans, has been found to grow up to 40 feet long.

cdc.gov

4. Echinococcosis:

Also known as hydatid disease, this is another parasitic tapeworm infection, which an twist. When the Echinococcis granulosus worm infects a host, it creates an other-worldly cyst in the body. The cyst continues to expand until it is either removed, or overcomes the host. More disturbing is that the echinococcosis loves to make its home in the host brain. The image below shows the removal of a hydatid cyst from the abdomen. This movie depicts removal of a cyst from the brain and is a very graphic, real-life example of how large the cysts in the brain get, and how they are removed.

3. Bed Bug Infestation:

Why is the Cimicidae parasite so high on the list? If you are asking that question, you have never seen a real infestation. While I was a fourth year medical student I was riding with an EMS team when we picked up a homeless man to bring to the hospital. While enroute to the ED we noticed hundreds of red sores. When asked about the wounds, the man did not know anything about them. Two minutes into the drive I saw movement around the man’s waistline. All of the sudden, 25-30 bed bugs crawled out of his pants and started doing their business on his belly and legs. The man felt nothing. I grabbed one bug with a towel to verify the infestation. Instantly, all 30 bugs rushed right back into the mans pants. If you don’t think a full on Cimicidae infection is gross….just wait until you see one. You will itch for a month.

wikipedia.org

2. Ascariasis:

The great white parasitic roundworm. Though not as common nor as long as her tapeworm counterpart, Ascariasis are far more cruel. Contracted from eating ascariasis fecal matter, the larvae hatch in your gut, they dig through your intestines, eat through your lungs, move into your respiratory tract, and get reswallowed into your gut where they grow very large and very numerous. The worms can grow up to 1 foot in length, measuring inches in circumference, and there may be hundreds in one intestine. The image below is an intestine that has been opened up after surgery.

 
The most disgusting medical diagnosis…

1. Myiasis:

Maggots eating your flesh…and you don’t even know it! How do flies get in your body to lay eggs in the first place? How do people not realize there are hundreds of maggots eating their dying skin? How does it all happen? I don’t know, but the simple thought of the whole cycle makes me feel queasy. One interesting fact is that the use of maggot therapy is on the rise. Some physicians are beginning to adopt a century old practice of cleaning necrotic wounds with maggots…interesting. If you are really brave, check out the video published in BMC Surgery of a surgeon removing multiple maggots from a woman chest.
 

Canadian Medical Association Journal


Dermatology Online Journal


Myiasis in a cat

 

Honorable Mention:

Hypertrichosis:

“Werewolf Disease” is a genetic syndrome resulting in hear growth on every inch of your body.

Dracunculiasis:

Or “Guinea Worm Disease” results from long skinny roundworms that live in blisters in the legs and feet.

Filariasis:

Another roundworm disease, this one causes blockage of your lymphatic vessels leading to elephantiasis.