Dermoscopy of a plantar combined blue nevus: a simulator of melanoma.
Dermoscopy allows early detection of melanoma also on acral volar skin. The majority of melanocytic nevi on palms and soles may show three major dermoscopic patterns: the parallel-furrow pattern, the lattice-like pattern, and the fibrillar pattern. Melanomas at these sites are characterized by the parallel ridge pattern. We present the case of a 59-year-old woman who had an oval papule of bluish color, measuring 0.6 x 0.9 cm, localized on her left sole, that had been present, unchanged, for more than 10 years. Dermoscopy showed a parallel ridge pattern. The histopathological examination revealed a combined blue nevus. We present this case to underline that on acral volar skin also intradermal nevi, such as combined blue nevi, may dermoscopically exhibit a parallel ridge pattern, simulating melanoma.
Panasiti
V
V
Department of Dermatology, University of Rome La Sapienza, Rome, Italy. ilcapo75@gmx.net
Devirgiliis
V
V
Borroni
R G
RG
Mancini
M
M
Rossi
M
M
Curzio
M
M
Mastrecchia
B
B
Bottoni
U
U
Innocenzi
D
D
Calvieri
S
S
D046169:Dermoscopy; D003937:Diagnosis, Differential; D005260:Female; D005534:Foot Diseases / Q000175:diagnosis / Q000473:pathology*; D006801:Humans; D008545:Melanoma / Q000175:diagnosis / Q000473:pathology*; D008875:Middle Aged; D018329:Nevus, Blue / Q000175:diagnosis / Q000473:pathology*; D012867:Skin / Q000473:pathology; D012878:Skin Neoplasms / Q000175:diagnosis / Q000473:pathology*