1/2. Tripe palms associated with systemic mastocytosis: the role of transforming growth factor-alpha and efficacy of interferon-alfa.Tripe palms are thickened, moss-like or velvety textured exaggerations of the normal dermatoglyphics. The disease belongs to the spectrum of papulosquamous paraneoplastic syndromes. Although suspected, the role of transforming growth factor-alpha (TGF-alpha) has not been clearly established. A 54-year-old man with systemic mastocytosis presented with thickening and darkening of the palms and soles. We performed skin biopsies for light microscopy (including toluidine blue), in situ hybridization and double labelling, and determination of serum tryptase, histamine and TGF-alpha levels. Toluidine blue stained the mast cells that had massively infiltrated the dermis. Tripe palm samples showed extensive hyperkeratosis. The TGF-alpha probe reacted strongly with the mast cells that also reacted with the antitryptase monoclonal antibody. Elevated tryptase, histamine and TGF-alpha levels prior to interferon-alfa administration decreased under treatment. The demonstration of TGF-alpha in infiltrating mast cells, the clinical regression of tripe palms and the lowering of the serum level and the mast cell molecular signal of the cytokine when systemic mastocytosis was controlled by interferon-alfa, suggest a key role for TGF-alpha in this cutaneous paraneoplastic syndrome.- - - - - - - - - - ranking = 1keywords = palm (Clic here for more details about this article) |
2/2. Solitary mastocytoma on the palm.We report a solitary mastocytoma with a recurrent tense bulla on the palm of a 4-month-old male infant. Histologically there were numerous mast cells infiltrating the dermis. The bulla subsided without treatment in 2 weeks, remaining an oval reddish patch. The present case shows that solitary mastocytoma can occur on the palm, but to our knowledge, this site is unusual.- - - - - - - - - - ranking = 0.75keywords = palm (Clic here for more details about this article) |