Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Epidermal Cyst and Epidermoid Cyst?

“Epidermoid cyst. Synonym: Sebaceous cyst, steatoma, epithelial cyst. Definition: A cyst containing keratin and its breakdown products, surrounded by an epidermoid wall.” Mackie RM. Epidermal skin tumors. In: Champion RH, Burton JL, Eb…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…12B: A band of histiocytes, some of them multinucleate, around squamous epithelium that, in turn, surrounds cellulose = Foreign body reaction to a splinter The splinter came to be surrounded by squamous epithelium by virtue of epidermis, either surfa…

Histologic Diagnosis of Inflammatory Skin Diseases

See Classification of Pigmented Lesions

…ke keratosis Seborrheic keratosis Malignant neoplasms Basal cell carcinoma, pigmented Solar keratosis, pigmented Melanocytic lesions Benign Melanosis Simple lentigo Nevus of Ota, nevus of Ito Nevi Congenital Classic acral Superficial Super…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Dermatofibroma?

…gn tumor composed of a mixture of fibroblastic and histiocytic cells that are often arranged in cartwheel or storiform pattern and accompanied by varying numbers of inflammatory cells, foam cells, and siderophages. …When located in the skin, th…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Lentigo Maligna?

“Melanoma arising from lentigo maligna is preceded by or forms a part of a recognizable series of events affecting the melanocytic cellular system in a way similar to these stages. First, there is a long period characterized by an increase in…

Dermatology Practical & Conceptual

Letter to the Editor

To the Editor, In her essay, “On the nature of thought processes and their relationship to the accumulation of knowledge, Part XIII: The nature of evidence” [1], Cris Anderson helps us to look at the question of why a person would choose an alternat…

Histologic Diagnosis of Inflammatory Skin Diseases

Identification of Basic Patterns: Skin: Fibrosing Dermatitis

…aracterized episodically by extensive desmoplasia, and in some carcinomas metastatic to skin in which desmoplasia may be rife. Granulation tissue (Fig. 5.365 A&B), that quintessential inflammatory process characterized by an exuberant proliferati…