A Case of Amyloidosis Cutis Dyschromica

The patient was a 56-year-old female. The whole body has brown patches for 16 years. Dermatological examination: brown patches were observed on the trunk and lower limbs, with scattered hypomigmentation patches and symmetrical distribution of skin lesions. Histopathology of the skin showed mild hyperkeratosis in the epidermis, focal liquefaction degeneration in the basal layer, masses of light red stained material in the dermal papilla, scattered or small patches of lymphocytes and tissue cell infiltration around capillaries in the superficial dermis, more pigmentophagocytes and positive methyl violet staining were observed. Diagnosis: cutaneous amyloidosis with abnormal pigmentation. The patient is still being followed up.