'Dimpling' is not unique to dermatofibromas.
The dimpling of the skin with lateral compression or 'Fitzpatrick's sign' is considered by many to be pathognomonic for dermatofibromas (DFs). Despite the description of this sign in all major textbooks, not all DFs dimple and all that dimple are not DFs. Other diagnostic investigations such as the use of dermatoscopy may help to confirm the clinical suspicion of DF.
Meffert
J J
JJ
Department of Dermatology, Brooke Army Medical Center, Fort Sam Houston, Tex, USA.
Peake
M F
MF
Wilde
J L
JL
D001706:Biopsy; D002648:Child; D003937:Diagnosis, Differential; D005260:Female; D006099:Granuloma / Q000175:diagnosis / Q000473:pathology; D018219:Histiocytoma, Benign Fibrous / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D008853:Microscopy; D008875:Middle Aged; D018296:Pilomatrixoma / Q000175:diagnosis / Q000473:pathology; D011312:Pressure; D012867:Skin / Q000473:pathology; D012871:Skin Diseases / Q000175:diagnosis / Q000473:pathology; D012878:Skin Neoplasms / Q000175:diagnosis* / Q000473:pathology; D014973:Xanthomatosis / Q000175:diagnosis / Q000473:pathology