Reticulate acropigmentation of Kitamura and Dowling-Degos disease overlap: a rare case report

Reticulate acropigmentation of Kitamura (RAK) and Dowling-Degos disease (DDD) belong to the rare heterogeneous group of reticulate pigmentary disorders. They are inherited as an autosomal dominant trait with variable penetrance and are characterized by the presence of hyperpigmented macules coalescing in a reticular fashion. We hereby describe a 29-year-old male patient having hyperpigmented macules on the neck, axillae, dorsum of the hands and feet, along with palmar pitting. A clinicopathological overlap of both these entities (RAK and DDD) was seen in this patient, which is a rare occurrence, indicating that they are two different phenotypic presentations of a single disease.