The Differential Diagnosis of Psoriasis Vulgaris

Psoriasis is a chronic, relapsing dermatose characterized by erythematous scaly plaques. Histopathological signs parakeratosis, losing of granular layer, acanthosis, papillomatosis, microabscess, capillary proliferation, excessive mitosis up to 50 fold. Differential diagnosis of psoriasis should be done with all bacterial-viral diseases, tumors, precancerous lesions, mycosis fungoides, subacute lupus erythematosus, allergic and atopic dermatitis, lichen planus, tinea pedis. In the differential diagnosis of psoriasis, Vulgaris should be thinking generally five dermatological diseases. 1. Nummular eczema, 2. MF, 3. Pityriasis rubra pilaris, 4. Duhring’s disease (dermatitis herpetiformis), 5. Bowen’s disease. In this review will be discussed clues of differential diagnosis of psoriasis.