Histologic Diagnosis of Inflammatory Skin Diseases

Errors and Reasons

Error: Abortive is an accurate modifier of particular pathologic processes, e.g., abortive dermatofibroma, abortive morphea, and abortive T-cell lymphoma. Reason: The idea itself is abortive! For example, what is called “abortive T-cell lympho…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

Images 10.43.1A: Nodular dermatitis, granulomatous + 10.43.1B: Interstitial and palisaded array of histiocytes around loci of deposits of mucin and degeneration of collagen = Granuloma annulare This is a presentation stereotypical of gran…

Histologic Diagnosis of Inflammatory Skin Diseases

Rheumatoid nodule

Rheumatoid nodule Presentation stereotypical Age and sex Children and adults, more often females Distribution of lesions Near joints, especially elbows, and along bony structures, particularly extensor surfaces of forearms Individual lesions Nodules…

Histologic Diagnosis of Inflammatory Skin Diseases

Identification of Basic Patterns: Skin: Nodular and Diffuse Dermatitis

See Fig. 5.174 A&B. Figure 5.174 A&B. Nodular dermatitis and diffuse dermatitis. Nodular dermatitis is distinguished from perivascular dermatitis (see Fig. 5.16 A&B) by the density of the infiltrate of inflammatory cells. In the periv…

Histologic Diagnosis of Inflammatory Skin Diseases

Elastosis perforans serpiginosa

Elastosis perforans serpiginosa Synonyms Elastoma intrapapillare perforans verruciforme Keratosis follicularis serpiginosa Serpiginous perforating elastosis Perforating elastoma Elastoma intrapapillare perforans Presentation stereotypical Age and…