Histologic Diagnosis of Inflammatory Skin Diseases

Traumatic fat necrosis

Traumatic fat necrosis Synonyms Traumatic fatty necrosis Traumatic panniculitis Presentation stereotypical Age and sex Any age, especially females Distribution of lesions Localized to sites of trauma Individual lesions Plaques and nodules Course If…

A Clinical Atlas of 101 Common Skin Diseases


A constellation of lesions that represent disorders of melanocytes (e.g., axillary "freckles" and café au lait "spots") and of proliferations of Schwann cells (e.g., papules, nodules, and tumors of neurofibroma). The cutaneous lesions may be accompanied by neoplasms with neural differentiation that are situated in nerves (e.g., acoustic neuroma) and in the brain (e.g., gliomas), […]

Therapeutic Strategies in Dermatology

Chondrodermatitis Nodularis Helicis: Key Points

Key Points Chondrodermatitis nodularis helicis (CNH) is an uncommon, strikingly painful lesion on the helix or antihelix of the ear, which often appears as a crusted ulceration mimicking a cutaneous malignancy. Diagnosis may be made by clinical exa…

Histologic Diagnosis of Inflammatory Skin Diseases


…+ 10.109.5B: Foam cells and fat “microcysts” = Traumatic fat necrosis ┬áInjury to adipocytes in subcutaneous fat results in changes that are both characteristic and diagnostic, those findings being illustrated well in this lesion of tr…

Differential Diagnosis in Dermatopathology


…be present in the uppermost portion of the dermis. Amputation neuromas secondary to supernumerary digits are stubs present at birth that represent neural remnants in skin of supernumerary digits lost, presumably, in utero. Amputation neuromas often…

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…

Dermatology Practical & Conceptual

Multiple confluent reddish nodules

The patient A 48-year-old fisherman from Amazonas (north of Brazil) developed a small papule on the anterior left leg after a traumatic injury with a piece of wood 20 years ago. Over the course of years, multiple large, confluent, reddish to brownis…