Trichoblastoma: is a clinical or dermoscopic diagnosis possible?

Background Trichoblastoma is a rare benign skin tumour that must be differentiated from basal cell carcinoma for its benign course and favourable outcome. Objectives To describe clinical and dermoscopic features of solitary primitive trichoblastoma and to compare them with trichoblastic basal cell c...

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Bibliographic Details
Published in:Journal of the European Academy of Dermatology and Venereology 2016-11, Vol.30 (11), p.1978-1980
Main Authors: Ghigliotti, G., De Col, E., Parodi, A., Bombonato, C., Argenziano, G.
Format: Article
Language:English
Subjects:
Dermoscopy - methods
Diagnosis, Differential
Humans
Skin Neoplasms - diagnosis
Skin Neoplasms - pathology
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Summary:Background Trichoblastoma is a rare benign skin tumour that must be differentiated from basal cell carcinoma for its benign course and favourable outcome. Objectives To describe clinical and dermoscopic features of solitary primitive trichoblastoma and to compare them with trichoblastic basal cell carcinoma (tBCC). Methods Digital dermoscopic images of 19 trichoblastoma and 19 tBCC were compared and reviewed by a dermatologist experienced in dermoscopy. Results The most striking dermoscopic difference between trichoblastoma and tBCC was the presence of blue‐grey globules and blue‐grey ovoid nests that were found to be more frequent but not exclusive of tBCC. Arborizing vessels were found both in trichoblastoma and tBCC, with a lower frequency in the latter. Conclusion Histology remains the gold standard to differentiate trichoblastoma from tBCC.
ISSN:0926-9959
1468-3083
DOI:10.1111/jdv.13830