Diagnosis of DPR begins with review of a patient's medical history, laboratory results, and clinical examination of symptoms. Biopsy and histopathological examination can be used to test for the presence of hyperkeratosis, parakeratosis, follicular plugging, and basal cell melanization, all indicators of DPR.
The process of diagnosing DPR involves a comprehensive review of the patient's medical background, laboratory data, and clinical presentation. To confirm the presence of DPR, tissue samples may be examined under a microscope to identify signs such as hyperkeratosis, parakeratosis, and basal cell melanization.