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.
DPR diagnosis begins with an examination of a patient's overall health record, laboratory results, and physical symptoms. Further testing, including biopsy and microscopic analysis, can help confirm the presence of DPR by identifying characteristic changes in skin cells.