Martorell-Calatayud et al listed criteria for acquired elastotic hemangioma. The authors are from Fundacion Instituto Valenciano de Oncologia in Valencia, Wake Forest University in Winston Salem and Fundacion Jimenez Diaz in Madrid.
Clinical features:
(1) middle-aged or older adult
(2) slow-growing erythematous to violaceous well-defined plaque
(3) occurrence in sun-exposed skin (usually upper extremity or head and neck)
Histologic features:
(1) band-like proliferation of small capillary vessels limited to upper dermis
(2) background of solar elastosis
(3) plump endothelial cells with a hobnail pattern (from protrusion into vascular lumen)
The diagnosis requires exclusion of other diagnoses such as Kaposi's sarcoma and cutaneous angiosarcoma.
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