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Histologic Diagnosis of Inflammatory Skin Diseases

Images

Images 10.22.1A: Vesicular dermatitis, intraepidermal, spongiotic + 10.22.1B: Hyphae in the cornified layer = Dermatophytosis Were there no hyphae present in the stratum corneum, the differential diagnosis also would include allergic cont…

Differential Diagnosis in Dermatopathology

Discussions

…ost likely they are formed by infundibula. In sum, perforating folliculitis (which really is not a folliculitis but an infundibulitis) and elastosis perforans serpiginosa (which usually is not serpiginous but arcuate and polycyclic) are distinctive p…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Dandruff a Disease?

“Seborrheic dermatitis consists of a dry form (simple dandruff), with small dry to thick powdery scales . . .” White JW. Localized eczematous disease. In: Sams WM, Lynch PJ, eds. Principles and practice of dermatology. New York, NY: Ch…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Sclerotic Fibroma?

…ibroma, and that it may be induced by inflammation, especially folliculitis.” Chang SN, Chun SI, Moon TK, Park WH. Solitary sclerotic fibroma of the skin: degenerated sclerotic change of inflammatory conditions, especially folliculitis. Am J D…

Histologic Diagnosis of Inflammatory Skin Diseases

Hair Follicles

Morphologic and qualitative differences in hair, a cornified end-product of matrical cells positioned in the center of a follicular bulb, exist among the races of Man. In general, Caucasians have the most prominent hair, Asians have the least, and A…

Histologic Diagnosis of Inflammatory Skin Diseases

Study By Disease

…ue) secondary to Crohn’s disease (Quiz #555) Suppurative folliculitis (Quiz #811) Suppurative folliculitis (Quiz #814) Suppurative folliculitis (furuncle) (Quiz #812) Suppurative infundibulitis (Quiz #665) Suppurative infundibulitis in a patien…

Histologic Diagnosis of Inflammatory Skin Diseases

Reactive perforating collagenosis

Reactive perforating collagenosis Presentation stereotypical Age and sex Any age, both sexes Distribution of lesions Asymmetric at sites of trauma; sometimes symmetrical Arrangement of lesions May be linear Individual lesions Ulcerated papules toppe…

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…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Common Baldness—an Inflammatory Disease?

“The results also show that inflammation in MPA [male pattern alopecia] is a relatively consistent finding and that, although often insignificant, this frequently leads to an inflammatory folliculitis, perifollicular fibrosis, and unusually…

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