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Trichilemmal cyst with homogeneous blue pigmentation on dermoscopy
Author(s) -
Gencoglan Gulsum,
Karaarslan Isil Kilinc,
Akalin Taner,
Ozdemir Fezal
Publication year - 2009
Publication title -
australasian journal of dermatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.67
H-Index - 53
eISSN - 1440-0960
pISSN - 0004-8380
DOI - 10.1111/j.1440-0960.2009.00566.x
Subject(s) - medicine , dermatology , homogeneous , cyst , pigmentation disorder , pathology , physics , thermodynamics
A 61‐year‐old woman was referred to our dermoscopy unit for a pigmented lesion that had been present on her left arm for 8 years. The patient did not notice any enlargement or change in colour. On dermoscopy, homogeneous blue pigmentation was seen. The lesion was excised with the pre‐operative diagnosis of melanoma, blue naevus and dermatofibroma. Histopathological examination showed a trichilemmal cyst in the mid‐dermis. Although homogeneous blue pigmentation on dermoscopy is the hallmark of blue naevus, it may be seen in metastatic melanoma and exceptionally in hemosiderotic and cellular types of dermatofibroma. Trichilemmal cyst should be borne in mind also in the dermoscopic differential diagnosis.