Pigmented onychomatricoma: A clinical simulator that could not mislead ultrasound.

Introduction: Onychomatricoma is a rare subungual tumor composed of stroma and nail matrix-like epithelium. Only seven cases of the pigmented variant have been reported in the literature.

Case Report: We present a 62-year-old male patient with a 2-years history of a single fingernail thickening, deformation, and hyperpigmentation.

Impact of the time interval between primary melanoma excision and sentinel node biopsy: A systematic review and meta-analysis.

Background: Obtaining a sentinel lymph node biopsy (SLNB) specimen is a standard staging procedure in the management of cutaneous melanoma. However, there is no consensus on the safe time interval between the primary melanoma biopsy procedure and the SLNB procedure.

Objective: We evaluated the association between time from biopsy to SLNB and patients' outcomes for melanoma.

Dermoscopy of Juvenile Xanthogranuloma.

Background: Dermoscopy is useful for the evaluation of juvenile xanthogranuloma (JXG). The classical "setting sun" pattern is characteristic of JXG, but its sensibility appears to be limited. An extensive description of other dermoscopic findings is not available in the literature.