Histologic Diagnosis of Inflammatory Skin Diseases

Crohn’s disease

Crohn’s disease Synonyms Inflammatory bowel disease Regional ileitis Regional enteritis Chronic cicatrizing enteritis Presentation stereotypical Age and sex Young adults; slight predominance of women Distribution of lesions The poles of the ga…

Histologic Diagnosis of Inflammatory Skin Diseases

Borreliosis (erythema migrans)

Borreliosis (erythema migrans) Presentation stereotypical Age and sex Any age and either sex Distribution of lesions Nearly anywhere, but mostly the lower extremities; involvement of face and scalp is more common in children Configuration of lesions…

Differential Diagnosis in Dermatopathology

Metastatic carcinoma from a breast vs. Morpheiform basal-cell carcinoma

An inflammatory process caused by one of several bacteria, especially Streptococcus pyogenes, and manifested clinically as erythematous patches and erythematous edematous plaques with scalloped outlines upon which vesicles and bullae, some of them h…

Histologic Diagnosis of Inflammatory Skin Diseases

Hypodermitis sclerodermiformis

Hypodermitis sclerodermiformis Synonyms Hypodermatitis sclerodermiformis Hypodermitis sclerositans Liposclerosis Lipodermatosclerosis Stasis dermatosclerosis Sclerotic panniculitis Sclerosing panniculitis Presentation stereotypical Age and sex Adult…

Histologic Diagnosis of Inflammatory Skin Diseases

"Folliculitis" (Infundibulitis)

“Folliculitis” (Infundibulitis) Synonyms What is designated, universally, folliculitis is, in actuality, infundibulitis. In short, infundibulitis is NOT a synonym for folliculitis; the former, for purposes practical, is a suppurative pro…

Differential Diagnosis in Dermatopathology

Discussions

In general, neoplasms metastatic to the skin present little difficulty in differential diagnosis from neoplasms primary in the skin. Carcinoma of the breast is an exception. If there are but a few neoplastic cells and numerous inflammatory cells sca…

Histologic Diagnosis of Inflammatory Skin Diseases

Leukocytoclastic vasculitis

Leukocytoclastic vasculitis Synonyms Leukocytoclastic angiitis Allergic vasculitis Hypersensitivity angiitis Hypersensitivity vasculitis Anaphylactoid purpura Immune complex vasculitis Purpura rheumatica Presentation stereotypical Age and sex Any ag…