5th-WCD-Abstract-book - ADF.pdf (1.63 MB)
The multiple faces of atypical dermatofibromas: Uncommon dermoscopic patterns
journal contribution
posted on 2018-06-18, 18:37 authored by Muntashir Shuvo, Damian Collins, Salvador J. Diaz-CanoSalvador J. Diaz-Cano, Lucia Pozo-GarciaDermatofibromas
are very common cutaneous lesions with a predilection for limbs of
young or middle-aged adults. Although the clinical diagnosis is usually
straightforward, dermoscopy is a valuable diagnostic tool to increase
the diagnostic accuracy
of these lesions.
The classic dermoscopic pattern of dermatofibromas consists in a white
central scar-like patch surrounded either by erythema or delicate
pigment network depending on the individual’s skin phototype (1).
However, dermatofibromas show a considerably variability of dermoscopic
patterns representing a diagnosis challenge even for expert
dermoscopists (2, 3).
We report fifteen cases of atypical dermatofibromas, which were
clinically diagnosed as basal cell carcinoma, Spitz naevus and malignant
melanoma. All lesions were excised and histologically confirmed as
dermatofibromas. Interestingly, most of these atypical lesions were
nodular and located on the back.
Uncommon dermoscopic patterns of dermatofibroma include multiple
colours, polymorphic blood vessels, white shiny lines on a pinkish
background, negative pigment network with dotted vessels, central white
patch with prominent peripheral linear
vessels and homogeneous blue colour with shiny white lines in the
aneurysmatic variant.
Histologic confirmation is mandatory in atypical dermatofibromas or
infrequent dermoscopic patterns to exclude another benign or malignant
tumours.
Key Words: Dermatofibroma, atypical, Spitz, melanoma, basal cell
carcinoma, dermoscopy
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2. Espasandin-Arias M, Moscarella E, Mota-Bucard A, Moreno-Moreno C,
Lallas A, Longo C, et al. The dermoscopic variability of
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