tailieunhanh - Ebook Histopathology of the skin: Part 2

(BQ) Part 1 book "Histopathology of the skin" presents the following contents: Pigmented purpuric dermatosis, dermatitis herpetiformis, sarcoidosis, lupus erythematosus, pyoderma gangrenosum, urticaria pigmentosa, gyrate and annular erythemas, seborrheic keratosis, basal cell carcinoma,. Invite you to consult. | 21 Chapter Pigmented Purpuric Dermatosis Schamberg s Disease Progressive pigmentary dermatosis PPD includes a group of conditions characterized clinically by the presence of petechial and pigmentary macules on lower legs. The disease has a chronic and relapsing course. There is extravasation of erythrocytes in the skin and or marked hemosiderin deposits which produces reddish brown lesions on skin. Following clinical entities are included under the heading of pigmented purpuric dermatosis. Schamberg s disease progresseive pigmented purpuric dermatosis . Purpura annularis telangiectodes Majocchis disease Lichen aureus. Pigmented purpuric lichenoid dermatosis of Gougerot and Blum Eczematoid like purpura of Doucas and Kapetanakis. Other rare conditions included in the group are Itching purpura of Lowenthal. Linear PPD. Granulomatous variant. Transitory PPD. Familial forms. There are a number of drugs reported to induce PPD. They are Acetaminophen. Aspirin. Adalin. Carbamol Chlordiazepoxide. Glipizide. Glybuzole. Hydralazine Meprobamate. Persentin. Reserpine. Thiamine. Interferon alfa. Injection Medroxy progesterone acetate. Schamberg s Disease Progressive Pigmented Purpuric Dermatosis Schamberg s disease is characterized by asymptomatic closely set pinhead-sized reddish brown macules resembling groups of cayenne-pepper present mainly on the lower limbs. Pigmented Purpuric Dermatosis 127 Purpura Annularis Telangiectodes Majocchis Disease The lesions are annular bluish-red in color which initially show central red telangiectatic puncta and later on there is atrophy. The lesions are variable in number and may involve upper extremities also. Pigmented Purpuric Lichenoid Dermatosis Gougerot-Blum Syndrome Clinically the condition presents as plaques of various hues comprising of tiny lichenoid paplues. Lichen Aureus Lichen Purpuricus This is characterized by sudden onset of intensely itchy localized eruption consisting of lichenoid papules in association with purpuric .