Journal of cutaneous medicine and surgery
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Mastocytosis is a rare disease characterized by a primary pathological increase in mast cells in different tissues. The skin is the most frequently affected organ. Cutaneous mastocytosis, including urticaria pigmentosa, solitary mastocytoma, diffuse cutaneous mastocytosis, and telangiectasia macularis eruptiva perstans (TMEP), is usually distinguished from systemic mastocytosis. TMEP is characterized mainly by telangiectatic macules. ⋯ TMEP is a rare form of mastocytosis, which occurs mainly in adults, generally has a good prognosis, and little tendency to urticate or show constitutional symptoms. Clinicians should consider this disorder when confronted with a progressive atypical telangiectatic lesion. However, the malignant neoplasm also found in this patient is of uncertain significance.