Seborrheic keratosis that follows Blaschko's lines

ABSTRACT A 66‐year‐old Japanese man had skin lesions on the left side of his trunk and the left upper extremity for approximately 10 years. The skin lesions were asymptomatic but increased gradually, which brought the patient to our hospital. On the initial examination, we noticed 5 mm × 5 mm to 15 ...

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Bibliographic Details
Published in:Journal of dermatology 2008-05, Vol.35 (5), p.301-303
Main Authors: MABUCHI, Tomotaka, AKASAKA, Emiko, KONDOH, Akio, UMEZAWA, Yoshinori, MATSUYAMA, Takashi, OZAWA, Akira
Format: Article
Language:English
Subjects:
Aged
Blaschko's lines
Humans
Keratosis, Seborrheic - pathology
Male
seborrheic keratosis
Skin - pathology
unilateral
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Summary:ABSTRACT A 66‐year‐old Japanese man had skin lesions on the left side of his trunk and the left upper extremity for approximately 10 years. The skin lesions were asymptomatic but increased gradually, which brought the patient to our hospital. On the initial examination, we noticed 5 mm × 5 mm to 15 mm × 5 mm, round or oval, light to dark brown keratotic papules on the left side of chest and abdomen and the left upper extremity. The papules were aligned in an S‐shaped line on the trunk and in a straight line on the upper extremity. Clinical and histopathological findings led to a diagnosis of seborrheic keratosis that followed Blaschko's lines. To our knowledge, no such a case has been reported previously. Our case supports the hypothesis that seborrheic keratosis can be associated with genetic mosaicism.
ISSN:0385-2407
1346-8138
DOI:10.1111/j.1346-8138.2008.00471.x