Late-onset disseminated superficial actinic porokeratosis in an elderly woman

INTRODUCTION Disseminated superficial actinic porokeratosis (DSAP) is the most common form of porokeratosis. A case of late-onset DSAP is reported with an uncommon presentation in an elderly patient. METHODS An 80-year-old woman, with diabetes mellitus treated with metformin, and hypertension treated with metoprolol and captopril, presented with multiple 2 mm-to-7 cm brown patches, for 5 years. The patches were often confluent with an atrophic center and a well-demarcated keratotic border located on the thighs, lower legs, and feet. RESULTS Histological examination of a cutaneous biopsy showed the presence of rare cornoid lamellae, confirming the clinical diagnosis of DSAP. CONCLUSION In this report, the atypical presentation of DSAP is discussed in this elderly patient and also the possible triggering factors at this age.