Histologic Diagnosis of Inflammatory Skin Diseases

Ecthyma gangrenosum

Ecthyma gangrenosum Presentation stereotypical Age and sex Any age, both sexes; usually in chronically or terminally ill patients or those vulnerable to Pseudomonas septicemia Distribution of lesions Anogenital and axillary regions especially Shape…

A Clinical Atlas of 101 Common Skin Diseases

Septic Vasculitis

A small-vessel vasculitis characterized clinically by vesiculopustules on an erythematous base, purpuric macules and papules, and hemorrhagic bullae, and histopathologically by thrombi within venules, a consequence of sepsis….

Histologic Diagnosis of Inflammatory Skin Diseases

Septic vasculitis

Septic vasculitis Synonyms Infectious angiitis Presentation stereotypical Age and sex Young adults of both sexes Distribution of lesions Widespread usually Arrangement of lesions Scattered Individual lesions Red macules, petechiae, hemorrhagic vesic…

Histologic Diagnosis of Inflammatory Skin Diseases

Applicable Terms

ABSCESS [L. abscessus (a going away)]: Clinically, a circumscribed collection of pus and histopathologically a localized collection of neutrophils. An abscess may form in the epidermis, both surface and infundibular, eccrine ducts, dermis, and subcu…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Lymphocytic Vasculitis?

“Lymphocytic vasculitis can be inferred unequivocally if there are infiltrates of lymphocytes in and around the walls of venules accompanied by fibrin deposition in their walls or lumens, or both.” Carlson JA, Mihm MC, Leboit PE. Cutan…

Histologic Diagnosis of Inflammatory Skin Diseases

Farmyard pox

Farmyard pox Synonyms Barnyard pox Presentation stereotypical Age and sex No predilection for age, but more common among men who are herders of sheep (orf) and cows (milker’s nodule), and in veterinarians Distribution of lesions Fingers especi…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

Images 10.99.1A: Vasculitis, small vessel, neutrophilic; panniculitis, lobular; perivascular and interstitial dermatitis, and vesicular dermatitis, subepidermal + 10.99.1B: Thrombi in the lumen of venules and countless bacteria in the int…

Histologic Diagnosis of Inflammatory Skin Diseases

Pyoderma gangrenosum

Pyoderma gangrenosum Synonyms Phagedena goemoetrica Dermatitis gangrenosa Malignant pyoderma Presentation stereotypical Age and sex Adults of both sexes Distribution of lesions Localized usually to the lower extremities; widespread episodically In…