Histologic Diagnosis of Inflammatory Skin Diseases

Identification of Basic Patterns: Subcutaneous Fat: Panniculitis

See Fig. 5.385 A-C. Figure 5.385 Patterns of panniculitis. A. Septal mostly. B. Lobular mostly. C. Septal and lobular “equally.” At scanning magnification, the normal subcutaneous fat is seen to be segregated by struts of fibrous tiss…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Trichoblastoma, trichoepitheliomatous type Trichoblastic (basal-cell) carcinoma, nodular type 1. Ulceration uncommon and always secondary to trauma 1. Ulceration common 2. Neoplasm symmetrical 2. Neoplasm asymmetrical 3. Neoplasm well-circum…

Histologic Diagnosis of Inflammatory Skin Diseases

Rosacea

Rosacea Synonyms Gutta rosea Presentation stereotypical Age and sex Young and middle-aged adults, usually Caucasian women Distribution of lesions Center of the face in vertical and horizontal directions, i.e., nose, forehead, cheeks, and chin Indivi…

Histologic Diagnosis of Inflammatory Skin Diseases

Parasitic infestations

Parasitic infestations Presentation stereotypical Age and sex No predilection for age or sex; occurring chiefly in the tropics Distribution of lesions Localized usually to one site anatomic; some infestations parasitic are associated with lesions wi…