SECTION EDITOR: MARY S. STONE, MD; ASSISTANT SECTION EDITORS: SOON BAHRAMI, MD; CARRIE ANN R. CUSACK, MD; SENAIT W. DYSON, MD; MOLLY A. HINSHAW, MD; ARNI K. KRISTJANSSON, MD
Histologic study of the biopsy specimen revealed orthohyperkeratotic, acanthotic epidermis along with an irregular elongated rete ridge and lichenoid tissue reaction with a bandlike infiltrate of lymphocytes in the upper dermis. Civatte bodies and pigment incontinence were conspicuous. Results from a complete blood cell count and biochemical blood tests showed normal findings. Serological test results for hepatitis B and C virus infections were negative. Internal malignant diseases were absent. The lesions started resolving gradually and spontaneously 2 weeks after the patient's first visit. Eight months later, the lesions had resolved completely, leaving behind slight pigmentation; there was no recurrence.
Grayish Brown Macules on the Axillae, Lower Abdomen, and Groin —Diagnosis. Arch Dermatol. 2011;147(9):1097-1102. doi:10.1001/archdermatol.2011.251-b