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Publication
Caso dermatológico: Nevo melanocítico subungueal com pseudo-sinal de Hutchinson
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Advisor(s)
Abstract(s)
ABSTRACT
Hutchinson’s sign is characterized
by extension of brown-black pigment
from the nail bed, matrix, and nail plate
onto the adjacent cuticle and proximal
and/or lateral nailfolds. It is an important
indicator of subungual melanoma. However,
experience has demonstrated that
Hutchinson’s sign, although valuable, is
not an infallible predictor of melanoma.
In fact, periungual pigmentation may be
caused by a variety of benign disorders
(pseudo-HS) and is not pathognomonic of
melanoma.
The authors present the clinical
case of subungual melanocytic nevus
with pseudo-Hutchinson sign in a seven
year-old boy. He presented with subungual
pigmentation of the second toe of
the left foot, associated with periungual
pigmentation compatible with Hutchinson
sign. However, the biopsy of the lesion revealed
a melanocytic nevus.
Diagnosis: Subungual melanocytic
nevus with pseudo-Hutchinson sign
Description
Keywords
pseudo-Hutchinson sign periungual hyperpigmentation melanocytic nevus subungual melanoma
Citation
Nascer e Crescer 2010; 19(1): 44-45