To B or not to B: is tylosis B truly benign? Two North American genealogies

Am J Gastroenterol. 1999 Mar;94(3):829-34. doi: 10.1111/j.1572-0241.1999.00954.x.


Tylosis is a rare, autosomal dominant syndrome presenting with hyperkeratosis of the palms and soles of the feet. Two types have been identified. Late onset tylosis (type A) is reported to be associated with a high incidence of esophageal carcinoma, whereas early onset tylosis (type B) appears to be a benign disorder. This distinction has significant implications for surveillance and prognosis. We report two families exhibiting early onset type B tylosis, spanning five and seven generations, respectively, and believe these to be the first two extensive genealogies of tylosis type B reported in North America. They serve to verify the features of type B tylosis and its benign prognosis. The world literature is reviewed and clinical relevance is discussed. Recommendations for follow-up of afflicted individuals are proposed.

Publication types

  • Case Reports

MeSH terms

  • Aged
  • Aged, 80 and over
  • Esophageal Neoplasms / complications
  • Female
  • Humans
  • Infant
  • Keratoderma, Palmoplantar, Diffuse / complications
  • Keratoderma, Palmoplantar, Diffuse / genetics*
  • Male
  • Pedigree