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Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Perforating Diseases?

…in the basic pathologic mechanism. These include perforating granuloma annulare, perforating folliculitis, elastosis perforans serpiginosa and reactive perforating collagenosis.” Mehregan A. Perforating dermatoses: a clinicopathologic review….

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Study By Disease

…the scalp (Quiz #279) Eruptive capillary hemangioma (pyogenic granuloma) (Quiz #887) Erysipelas (Quiz #38) Erysipelas (Quiz #251) Erythema annular centrifugum (Quiz #505) Erythema annulare centrifugum (Quiz #56) Erythema annulare centrifugum (Quiz #2…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Necrobiosis?

…agen. …The necrobiotic area contains prominent mucin in granuloma annulare, fibrin in rheumatoid nodule, and degenerated collagen in necrobiosis lipoidica.” Warschaw KE, Cotton JP. Glossary. In: Farmer ER, Hood AF, eds. Pathology of the…

Histologic Diagnosis of Inflammatory Skin Diseases

Interstitial granulomatous dermatitis with arthritis

Interstitial granulomatous dermatitis with arthritis Synonyms Interstitial granulomatous dermatitis with cutaneous cords and arthritis Rheumatoid papules Palisaded and neutrophilic granulomatous dermatitis Presentation stereotypical Age and sex Ad…

Differential Diagnosis in Dermatopathology

Discussions

Interstitial granulomatous dermatitis with arthritis, a distinctive disease that appears usually in patients with rheumatoid-like arthritis, has many attributes in common with the mostly interstitial type of granuloma annulare. Lesions of both condi…

Differential Diagnosis in Dermatopathology

Discussions

The interstitial expression of granuloma annulare and of papular mucinosis have several findings histopathologic in common, among them mesenchymal cells with abundant pink cytoplasm scattered among bundles of collagen, multinucleate cells in section…

Differential Diagnosis in Dermatopathology

Discussions

Lesions of granuloma annulare that involve the subcutaneous fat mostly have many findings in common with rheumatoid nodule. Both diseases are associated with epithelioid histiocytes arrayed in a palisade around zones of degenerated collagen, mucin,…

Histologic Diagnosis of Inflammatory Skin Diseases

Cells That Mediate Inflammation (Inflammatory Cells)

…h as Sweet’s syndrome and for months and years, such as granuloma faciale/erythema elevatum diutinum, and in which eosinophils are preponderant for long, such as in a peculiar response to an insect “bite.” T lymphocytes play a criti…

Histologic Diagnosis of Inflammatory Skin Diseases

Leukocytoclastic vasculitis

…n, among many others, may induce leukocytoclastic vasculitis. Granuloma faciale/erythema elevatum diutinum represent different names for the same process pathologic on different anatomic sites, to wit, a long-standing manifestation of leukocytoclasti…

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