Abnormal nail morphology Nail psoriasis 2020-11-29T14:25:23Z Psoriatic nail abnormality characterized by the presence of neutrophils in the nail bed epithelium, hyperkeratosis with parakeratosis, presence of exudates on the corneal epithelium, focal hypogranulosis and psoriasiform hyperplasia of the nail bed. The prevalence of nail involvement in individuals with psoriasis is approximately 50%, with even higher prevalnce in individuals with psoriatic arthritis.