Dermoscopy features of atypical fibroxanthoma: A multicenter study of the International Dermoscopy Society

Elvira Moscarella, Simonetta Piana, Francesca Specchio, Athanassios Kyrgidis, Gianluca Nazzaro, Maite L Eliceche, Francesco Savoia, Leonardo Bugatti, Giorgio Filosa, Iris Zalaudek, Federica Scarfi, Mike Inskip, Cliff Rosendahl, John H Pyne, Graeme Siggs, Arzu K Toğral, Horatio Cabo, Lubomir Drlik, Aimilios Lallas, Caterina LongoGiuseppe Argenziano

Research output: Contribution to journalArticlepeer-review

Abstract

BACKGROUND/OBJECTIVES: Little is known about the dermoscopic features of atypical fibroxanthoma.

METHODS: This was a case-control study. Atypical fibroxanthoma lesions were compared with a control group with non-melanoma skin cancer.

RESULTS: Altogether 40 atypical fibroxanthoma were collected. Most developed in men (93%), appearing mainly as nodular (63%), amelanotic (93%) and ulcerated (78%) lesions. Most lesions were located on the scalp (55%) and the ears (13%). Dermoscopically, most atypical fibroxanthoma displayed red (83%) and white (70%) structureless areas and irregular linear vessels (43%). A series of features achieved statistical significance when comparing atypical fibroxanthoma with non-melanoma skin cancer. The presence of red and white structureless areas and white lines, and the absence of yellowish-white opaque scales, hairpin vessels and arborising vessels were predictive of atypical fibroxanthoma in univariate analysis. However, when squamous cell carcinoma was excluded from the analysis, none of the criteria achieved statistical significance. When basal cell carcinoma was excluded, three variables achieved statistical significance in predicting atypical fibroxanthoma: red, structureless areas, the absence of opaque yellowish-white scales and absence of white circles.

CONCLUSIONS: Atypical fibroxanthomas seem to be barely distinguishable from basal cell carcinoma dermoscopically, but they are more easily distinguishable from a well to moderately differentiated squamous cell carcinoma. A histopathological examination is needed for the final diagnosis.

Original languageEnglish
Pages (from-to)309-314
Number of pages6
JournalAustralasian Journal of Dermatology
Volume59
Issue number4
DOIs
Publication statusPublished - Nov 2018

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