Histologic Diagnosis of Inflammatory Skin Diseases

Pityriasis rosea

Pityriasis rosea Synonyms Pityriasis circiné Pityriasis disseminé Pityriasis marginée et circiné Roseola annulata Roseola squamosa Presentation stereotypical Age and sex Usually young to middle-aged persons of both sexes; women especially Distributi…

Histologic Diagnosis of Inflammatory Skin Diseases

Linear IgA dermatosis

…lae, elbows, and sacral region, and presents itself usually as urticarial papules and vesicles, rather than as bullae. Correlation clinicopathologic Urticarial papules consist of edematous dermal papillae that house neutrophils. Tense blisters are s…

Differential Diagnosis in Dermatopathology

Discussions

…mbilicus, a zone that generally is spared by lesions of PUPPP. Urticarial papules of PUPPP have predilection for stria on the abdomen, unlike the urticarial lesions of herpes gestationis. Blisters, i.e., vesicles and bullae, the most important sign m…

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…

Differential Diagnosis in Dermatopathology

Xanthogranuloma vs. Reticulohistiocytic granuloma

A condition of persons of any age, but particularly children with a genetic proclivity for allergic rhinitis and conjunctivitis, and allergic asthma. Intense pruritus induces patients to rub the skin intensely and to scratch furiously, the resultant…

Histologic Diagnosis of Inflammatory Skin Diseases

Blister secondary to hypoxemia and local pressure

Blister secondary to hypoxemia and local pressure Presentation stereotypical Age and sex Any age and either sex Distribution of lesions Sites of pressure Configuration of lesions Linear often, especially over wings of scapulae Individual lesions Ery…

Histologic Diagnosis of Inflammatory Skin Diseases

Erythema figuratum

…thema gyratum repens, or to one another, among those being the urticarial stage of bullous pemphigoid and, at times, even urticaria itself, to say nothing of psoriasis and mycosis fungoides that, episodically, present themselves as annular, arcuate,…