Seborrheic keratosislike melanoma with folliculotropism.
BACKGROUND
Seborrheic keratosislike melanoma could be one of the most problematic melanoma simulators, and it may be incorrectly treated by electrocautery or cryotherapy. Dermoscopic examination of pigmented tumors improves the diagnostic accuracy in these challenging lesions. In these tumors, numerous comedolike openings are present.


METHODS
A 34-year-old man was seen for a conspicuous pigmented lesion on his back that clinically resembled a seborrheic keratosis because of the presence of multiple comedolike openings. Findings from dermoscopic examination showed distinct melanoma criteria (atypical pigmented network, asymmetric globules and dots, and a blue-whitish veil), in addition to multiple comedolike openings. Histopathological examination confirmed a peculiar melanoma variant characterized by prominent folliculotropism and minimal radial spreading. This tumor was not associated with chronic sun-damaged skin.


CONCLUSIONS
Dermoscopy was useful in identifying a particular case of seborrheic keratosislike melanoma with folliculotropism, thus avoiding incorrect treatment.
Carrera
Cristina
C
Melanoma Unit, Department of Dermatology, Hospital Clínic de Barcelona, Institut d'Investigacions Biomèdiques August Pi i Sunyer, Spain. criscarrer@yahoo.es
Segura
Sonia
S
Palou
Josep
J
Puig
Susana
S
Segura
Jordi
J
Martí
Rosa M
RM
Malvehy
Josep
J
D000328:Adult; D006801:Humans; D017492:Keratosis, Seborrheic / Q000473:pathology; D008297:Male; D008545:Melanoma / Q000473:pathology*; D012878:Skin Neoplasms / Q000473:pathology*