Tylosis is the medical word for thick, hard, callus-like skin on the palms of the hands and the soles of the feet.1PubMed Central. Tylosis with oesophageal cancer: Diagnosis, management and molecular mechanisms In one rare family form, though, that skin is an outward sign of a serious risk inside the body: a very high chance of cancer of the esophagus.2PubMed Central. Uncommon Endoscopic Findings in a Tylosis Patient: A Case Report What tylosis means for you depends less on how the skin looks than on where it comes from and whether it runs in your family.
Tylosis and the Rare Inherited Form Linked to Cancer
Doctors have a broader term, palmoplantar keratoderma, for any thickening of the skin on the palms and soles, and you may see it in your records.3Cutis. Paraneoplastic Palmoplantar Keratoderma Secondary to Metastatic Uterine Adenocarcinoma It can be inherited or it can develop later in life.4Cutis. Paraneoplastic Palmoplantar Keratoderma Secondary to Metastatic Uterine Adenocarcinoma The inherited forms make up a large and varied group, and dermatologists still debate how to classify them.5PubMed Central. The hereditary palmoplantar keratoses: an updated review and classification
One of those inherited forms is specifically linked to esophageal cancer. Tylosis with esophageal cancer, often shortened to TOC, is a rare inherited condition.6Handbook of Tumor Syndromes. Tylosis with Esophageal Cancer It is also called Howel-Evans syndrome.7PubMed Central. Uncommon Endoscopic Findings in a Tylosis Patient: A Case Report In TOC the thickening appears in patches, at pressure points such as the heels, rather than evenly over the whole palm or sole.8PubMed Central. Uncommon Endoscopic Findings in a Tylosis Patient: A Case Report
Ordinary calluses come from friction, such as a tool handle or a tight shoe, and they soften once the rubbing stops. Inherited thickening keeps coming back even when you are putting less pressure on the area, and it often starts in childhood.
A dermatologist sorts out the cause by looking at the pattern: whether the thickening is patchy or covers the whole palm and sole, and whether it reaches the backs of the hands and feet. They also ask about relatives with thick skin or esophageal cancer, which is the clue that separates the cancer-linked family form from the others.
The name itself causes confusion. “Tylosis” is sometimes used loosely for any thick palm and sole skin, but on medical notes it often refers specifically to the cancer-linked family form. If the word appears in your records, ask your doctor which meaning they intend.
Symptoms You Can See and Feel
The main sign is thickened, hard skin on the palms and soles, often in patches at pressure points.9Handbook of Tumor Syndromes. Tylosis with Esophageal Cancer The skin can crack and split, with mild scaling.10PubMed Central. Resolution of paraneoplastic palmoplantar keratoderma after treating mixed serous neuroendocrine tumor of the pancreas: a case report and literature review Many people with thickened palm and sole skin describe pain that can seriously affect daily life.11PubMed. Pain mechanisms in hereditary palmoplantar keratodermas In severe cases, walking and working with the hands can become difficult.12PubMed Central. Treatment of Painful Palmoplantar Keratoderma Related to Pachyonychia Congenita Using EGFR Inhibitors
Day to day, splits in thickened palms can make gripping tools, handling paper, or typing painful. Thick soles can change how you walk, as people shift weight to avoid sore spots, and shoes may rub or feel too tight.
People with TOC may have white patches inside the mouth.13GARD. Palmoplantar keratoderma-esophageal carcinoma syndrome The inside of the esophagus can have tiny white bumps about 2 to 5 mm across, which can only be seen with a camera.14PubMed Central. Tylosis with oesophageal cancer: Diagnosis, management and molecular mechanisms These bumps usually cause no symptoms.
Some changes call for a doctor visit. Trouble swallowing, or a sense that food sticks on the way down, should be checked promptly, especially in someone from a family with the cancer-linked form. Weight loss you cannot explain by changes in eating or activity is another reason to be seen. Cracks that bleed, ooze, swell, or become increasingly painful may be infected and need treatment.
What Causes Tylosis
TOC is caused by changes in a gene called RHBDF2.15PubMed Central. RHBDF2 mutations are associated with tylosis, a familial esophageal cancer syndrome This gene controls a protein that helps skin cells respond to stress and to the signals that tell them to grow.16PubMed Central. iRHOM2-dependent regulation of ADAM17 in cutaneous disease and epidermal barrier function The faulty version turns those growth signals up, so skin cells on pressure-bearing areas multiply more than they should. That extra growth may help explain the thickening, though researchers are still working out the full picture.17PubMed Central. iRHOM2-dependent regulation of ADAM17 in cutaneous disease and epidermal barrier function
In TOC, one changed copy of the gene is enough to cause it.18PubMed Central. RHBDF2 mutations are associated with tylosis, a familial esophageal cancer syndrome Each child of an affected parent has a 1 in 2 chance of inheriting it. It affects sons and daughters alike, and it can pass down from either the mother or the father.
A blood or saliva sample can be checked for a change in the RHBDF2 gene. In a family where the cancer-linked form is suspected, a positive result confirms the diagnosis. The result also helps decide who needs regular cancer screening and who does not.
Thick palm and sole skin that appears in adulthood can be the body’s reaction to a cancer elsewhere.19Cutis. Paraneoplastic Palmoplantar Keratoderma Secondary to Metastatic Uterine Adenocarcinoma In one reported case, the thick skin cleared up after a pancreatic tumor was treated.20PubMed Central. Resolution of paraneoplastic palmoplantar keratoderma after treating mixed serous neuroendocrine tumor of the pancreas: a case report and literature review Skin conditions such as eczema or psoriasis can also thicken palm and sole skin, and removing the trigger can sometimes clear it.
Treatment for Thick, Painful Skin
First-line options are keratolytics, which are skin-softening creams containing urea, salicylic acid, or lactic acid.21PubMed. Acquired palmoplantar keratoderma Regular paring or filing away of the thick skin helps.22PubMed. Acquired palmoplantar keratoderma Retinoid creams and steroid creams are other options.23PubMed. Acquired palmoplantar keratoderma Results build with regular use, so people usually need to keep applying the creams, and the thickening tends to come back if they stop.
At home, a routine can make a real difference:
- Soak: put hands or feet in warm water for about ten minutes first, since softened skin is easier to file and less likely to tear.
- File: gently work the thick areas with a foot file or pumice stone, taking off a little at a time and stopping if the skin feels tender. Avoid blades or razors, which can cause bleeding and infection.
- Moisturize: apply a urea cream to slightly damp skin so it holds in moisture, and cover with cotton gloves or socks overnight for stronger effect.
- Protect: choose cushioned, well-fitting shoes, because pressure and rubbing are what make thick patches sore and crack.
Retinoid tablets such as acitretin have long been known to work for thick skin conditions.24Cutis. Tylosis in a Patient With Howel-Evans Syndrome: Management With Acitretin They are a vitamin A-related medicine, used when creams and paring have not controlled the skin. They need blood tests at the start and about every 3 months, mainly checking liver function and cholesterol.25Cutis. Tylosis in a Patient With Howel-Evans Syndrome: Management With Acitretin Retinoids can cause birth defects, so doctors take special care with anyone who could become pregnant, and side effects such as dry lips and skin mean the doctor weighs benefit against harm.
Surgery is rare. In one severe case, surgically shaving down the thick skin gave relief for about 3 to 4 months before it grew back.26PubMed. Cutting Through Complexity: Surgical Management of Severe Palmoplantar Keratoderma In another case, surgeons removed the affected skin entirely and replaced it with grafts.27PubMed. Cutting Through Complexity: Surgical Management of Severe Palmoplantar Keratoderma
Treatment controls the thickening but does not cure the condition or lower the risk of esophageal cancer.
Esophageal Cancer Risk and Screening
People with TOC have about a 95% chance of developing esophageal cancer by age 65.28Handbook of Tumor Syndromes. Tylosis with Esophageal Cancer The cancer starts in the flat lining cells of the esophagus.29PubMed Central. Uncommon Endoscopic Findings in a Tylosis Patient: A Case Report Early on it often causes no symptoms, so by the time swallowing becomes difficult it may have progressed. The figure describes people who carry the changed gene, so it does not apply to everyone with thick palms and soles.
Guidelines recommend an endoscopy, a camera check of the esophagus, every 1 to 3 years starting at age 30.30PubMed. ASGE guideline: The role of endoscopy in the surveillance of premalignant conditions of the upper GI tract The aim is to find early changes before symptoms appear, when they are easier to treat.
A thin, flexible tube with a camera is passed through the mouth so the doctor can see the lining of the esophagus. Most people are given sedation, so you will need someone to drive you home. The doctor can take small tissue samples to examine later.
Dermatologists are encouraged to discuss quitting smoking with affected families.31PubMed. A survey study with assessment of esophageal screening and genetic counseling in patients with Howel-Evans syndrome Stopping smoking removes a known esophageal cancer risk, and limiting alcohol helps for the same reason.
What Family Members Should Do
Genetic counseling can be offered to patients and relatives once the condition is known to run in a family.32Orphanet Journal of Rare Diseases. Tylosis with oesophageal cancer: Diagnosis, management and molecular mechanisms Because the TOC gene change has been identified, relatives can be tested for it.33Orphanet Journal of Rare Diseases. Tylosis with oesophageal cancer: Diagnosis, management and molecular mechanisms When the family’s gene change is known, relatives who test negative can avoid unnecessary screening.
A counselor reviews the family history and explains the chance of inheriting the change and what a positive or negative result would mean. Testing is voluntary.
For a relative, the steps are practical. Ask your doctor for a referral to a genetics service. Bring a family tree showing who had thick palm and sole skin or esophageal cancer, and at what age. If you test positive, share the result with siblings and adult children, since they may also be at risk, and begin screening at age 30, as the guidelines advise.
Support groups for rare diseases can connect you with people who understand the daily challenges. If pain or stress is affecting daily life, tell your doctor, since treatment and support options exist for both.