Post on 23-Dec-2015
Senile purpura:
Multiple purpuric macules
Idiopathic thrombocytopenic purpura:
Multiple petechiae on the arm
Disseminated intravascular coagulation:
Extensive geographic cutaneous infarction on the forearm
Disseminated intravascular coagulation:
Extensive deep purple ecchymoses with
hemorragic blister formation
Henoch-Schonlein purpura:
Multiple palpable deep purple macules on the extensor side of lower extremities and buttocks
Henoch-Schonlein purpura:
Small venules show fibrinoid necrosis with considerable red cell extravasation.
Henoch-Schonlein purpura:
The DIF of IgA shows granular depositions at the papillary dermis.
Pityriasis lichenoides et varioliformis acuta :
Multiple erythematous papules on the back and buttocks
Pityriasis lichenoides et varioliformis acuta :
Multiple erythematous papules with necrotic and crusted lesions on the buttocks
Pityriasis lichenoides et varioliformis acuta :
Multiple erythematous papules with necrotic and crusted lesions on the buttocks
Pityriasis lichenoides et varioliformis acuta :
This view shows basal cell hydropic degeneration, moderate lymphohistiocytic infiltrate at the upper dermis and red cell extravasation.
Pityriasis lichenoides et varioliformis acuta :
This view shows mild spongiosis, basal cell hydropic degeneration, moderate lymphohistiocytic infiltrate at the upper dermis and red cell extravasation.
Pityriasis lichenoides chronica :
Multiple brownish-to-red scaly papules with and crusted lesions
Erythema elevatum diutinum :
Multiple erythematous nodules present on the back of the hand.
Erythema elevatum diutinum :
Multiple erythematous nodules present on the back of the hand.
Erythema elevatum diutinum :
Multiple erythematous nodules present on the palm and fingers.
Erythema elevatum diutinum :
Multiple erythematous nodules present on the palm and fingers.
Sweet’s syndrome :
Erythematous, edematous plaques on the periorbital area with superficial tiny pustules .
Sweet’s syndrome :
Erythematous, edematous plaques on the neck with pustules and crusted lesions .
Sweet’s syndrome :
The epidermis shows subcorneal pustulation. There are diffuse mixed cell infiltrates in the dermis.
Sweet’s syndrome :
The infiltrate consisted largely of neutrophils.
Polyarteritis nodosa:
Several dermal and subcutaneous nodules on the back of the foot.
Polyarteritis nodosa:
Several erythematous dermal and subcutaneous nodules with ulceration on the foot.
Polyarteritis nodosa:
Necrotizing vasculitis is seen within the subcutaneous fat.
Polyarteritis nodosa:
Necrotizing vasculitis is seen within the subcutaneous fat.
Wegener’s granulomatosis:
Several erythematous-dark red ulcerating plaques and nodules on the foot.
Wegener’s granulomatosis:
One erythematous-dark red ulcerating plaque with blister formation.
Wegener’s granulomatosis:
Extensive necrotizing vasculitis is seen within the dermis with red cell extravasation.
Wegener’s granulomatosis:
Close-up view shows necrotizing vasculitis with red cell extravasation.
Wegener’s granulomatosis:
Nasal mucosa biopsy shows necrotizing vasculitis
Wegener’s granulomatosis:
Transbronchial biopsy shows necrotizing vasculitis with extravascular granuloma formation.
Wegener’s granulomatosis:
Chest films shows cavitation on the right upper lobs.
Dego’s syndrome:
Small white papules with central depression and white fine scaling.
Dego’s syndrome:
There is hyperkeratosis with epidermal atrophy
Dego’s syndrome:
There is hyperkeratosis with epidermal atrophy with ectatic vessels.
Dego’s syndrome:
There is hyperkeratosis with epidermal atrophy. Note the ectatic vessels.
Livedo reticularis:
A mottled violaceous discoloration of the skin in a net-like pattern.
Livedo reticularis:
A mottled erythematous discoloration of the skin in a net-like pattern.
Livedoid vasculitis: Multiple purpuric macules
Livedoid vasculitis: Multiple purpuric macules
Livedoid vasculitis: Punched-out ulcers are seen on the ankle
Lymphomatoid granulomatosis: Multiple erythematous macules
Lymphomatoid granulomatosis: Nodular to ulcerative cutaneous lesions
Lymphomatoid granulomatosis: Nodular to ulcerative cutaneous lesions
Lymphomatoid granulomatosis: Nodular lymphoid and/or granulomatous infiltration surrounding the vessels
Lymphomatoid granulomatosis: Nodular lymphoid infiltration surrounding the vessles
Purpura pigmentosa chronica: Multiple erythematous patches on the lower leg
Purpura pigmentosa chronica: Scaly petechial or purpuric macules
Acne vulgaris: Multiple erythematous papules and pustules
Acne vulgaris: Multiple erythematous papules and pustules
Steroid acne: Multiple erythematous papules and pustules
Steroid acne: Multiple erythematous papules and pustules
Neonatal: Multiple erythematous papules and pustules on a neonate
Rosacea: Swollen nose with sebaceous gland hyperplasia and fibrosis
Rosacea: Telangiectasia and erythema.
Androgenic alopecia: Alopecia with the typical M-shape pattern
Follicular muconosis: Acute form. Boggy plaques on the face.
Follicular muconosis: Acute form. Boggy plaques on the face.
Follicular muconosis: Mucin deposition in the follicles. Interfollicular cell infiltrate
Follicular muconosis: Mucin deposition in the follicles. Interfollicular cell infiltrate
Follicular muconosis: Mucin deposition in the follicles. Interfollicular cell infiltrate
Relapsing polychondritis: Erythema, swelling, and pain of the cartilaginous portion of the ear
Relapsing polychondritis: Loss of basophilic staining and breakdown of lacunar structure of the cartilage
Relapsing polychondritis: Loss of basophilic staining and breakdown of lacunar structure of the cartilage
Relapsing polychondritis: Breakdown of lacunar structure of the cartilage
Eosinophilic pustular folliculitis: Erythematous plaque with superimposed coalescent pustules
Eosinophilic pustular folliculitis: Erythematous plaque with superimposed coalescent pustules
Eosinophilic pustular folliculitis: Microabscess composed of eosinophils
Pityrosporum folliculitis: Pruritic eryhematous papules and pustules, primarily on the back, chest, and shoulders
Pityrosporum folliculitis: Pruritic eryhematous papules and pustules, primarily on the back, chest, and shoulders
Eosinophilic cellulitis: Recurrent painful or pruiritic plaques
Eosinophilic cellulitis: Recurrent painful or pruiritic plaques with bullae
Eosinophilic cellulitis: Recurrent painful or pruiritic plaques with bullae
Eosinophilic cellulitis: Diffuse eosinophilic infiltrate throughout the dermis
Eosinophilic cellulitis: Diffuse eosinophilic infiltrate throughout the dermis. Flame figures can be seen.