Purple-brown coalescing macules on the mandibular area of the face.

This patient presented with a 1-year history of violaceous-brown, coalescing reticulated macules on his face, with no similar lesions in other body areas. Laboratory findings were normal and antinuclear antibody test was negative. Histopathological findings included lichenoid tissue reaction and prominent pigmentary incontinence.

Congenital longitudinal melanonychia: a case report.

Congenital longitudinal melanonychia is rarely seen in Caucasians and poses a diagnostic dilemma. It is characterized by the presence of hyperpigmented brown or black streaks visible in the nail plate. We present the case of 20-month-old boy with congenital longitudinal melanonychia, the diagnostic procedure, and management.