Angioma serpiginosum in a patchy and blaschkoid distribution: A rare condition with an unconventional presentation

Blaschkoid angioma serpiginosum: A dermoscopic diagnosis

“…AS was first described by Hutchinson in 1889, and Radcliffe–Crocker proposed the term angioma serpiginosum in 1893. [ 1 ] It is a vascular anomaly with 90% of cases occurring in females classically beginning in childhood and adolescent age with 80% cases occurring before 20 years of age. [ 2 ] Clinically, it presents with characteristic multiple, small, asymptomatic, nonpalpable, deep-red punctate macules organized in small clusters and sheets forming a serpiginous and gyrate pattern.…”

“…[ 2 ] Clinically, it presents with characteristic multiple, small, asymptomatic, nonpalpable, deep-red punctate macules organized in small clusters and sheets forming a serpiginous and gyrate pattern. [ 1 2 ] It commonly appears on extremities, often starting unilaterally over blaschko's lines Although dissemination can occur, palms, soles, and mucosa are rarely affected. Plantar involvement has been reported.…”

“…Female predominance, adolescent age of onset, and rapid progression in pregnancy might be indirect evidence of the role of estrogen in its pathogenesis. [ 1 ] Histopathology lacks epidermal changes or extravasation of red blood cells and reveals dilated, thin-walled capillaries in the dermal papillae and upper dermis. [ 2 ] Dermoscopy reveals characteristic well-demarcated red lagoons owing to dilated vascular spaces within the papillary or superficial reticular dermis.…”