Pitfall in pigmentation: pseudopods in the nail plate.
BACKGROUND
We present here a patient with an unusual type of nail plate pigmentation featuring pseudopod formation.


OBJECTIVE
To identify additional dermoscopic criteria.


METHODS
Dermoscopy of the nail with control biopsy.


RESULTS
Pseudopods of the nail resulted from erythrocytes entrapped between the layers of the nail plate.


CONCLUSIONS
Pseudopod formation of the nail may represent a diagnostic criterion to distinguish hemorrhage and melanoma of the nail apparatus.
Haas
Norbert
N
Department of Dermatology, Medical Faculty (Charité), Humboldt-University Berlin, Berlin, Germany. norb.haas@charite.de
Henz
Beate-Maria
BM
D001706:Biopsy; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008875:Middle Aged; D009260:Nail Diseases / Q000175:diagnosis*; D009262:Nails / Q000098:blood supply*; D010859:Pigmentation Disorders / Q000175:diagnosis*