A Clinical Atlas of 101 Common Skin Diseases

Sebaceous Gland Hyperplasia

An enlargement of normal pre-existing sebaceous lobules on the face, the forehead, cheeks, and nose in particular, that results in lesions seen clinically to consist of a rim of yellow papules around a central dell that represents a dilated ostium o…

A Clinical Atlas of 101 Common Skin Diseases

Granuloma Annulare

An inflammatory, i.e., granulomatous, process that usually takes the form of papules which in constellation often assume annular, arcuate, and serpiginous shapes. Many variants exist, among them widespread papules, papules in photodistribution, papu…

A Clinical Atlas of 101 Common Skin Diseases

Dermatofibroma

An inflammatory process that develops secondary to trauma, usually in the form of a penetrating injury or rupture of a follicle, and that proceeds through stages of granulation tissue with numerous extravasated erythrocytes, granulomatous inflammati…

Histologic Diagnosis of Inflammatory Skin Diseases

Identification of Basic Patterns: Skin: Fibrosing Dermatitis

…e in the sequence chronological of dermatofibroma: a prominent dell. Fibroplasia in a longstanding dermatofibroma may cause the skin to retract markedly, the result being a dramatic dell in the center of the lesion, causing it to pucker. Sclerosis in…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

Images 10.20.1A: Nodular dermatitis, granulomatous + 10.20.1B: Numerous extravasated erythrocytes, siderophages, and fibrocytes = Dermatofibroma An important finding for diagnosis of a dermatofibroma such as this one is seen at the periph…

Histologic Diagnosis of Inflammatory Skin Diseases

Dermatofibroma

Dermatofibroma Synonyms Benign fibrous histiocytoma Fibroma dura Subepidermal nodular sclerosis Histiocytoma Histiocytoma cutis Sclerosing hemangioma Fibroma simplex or fibroma durum Nodulus cutaneus Fibrome en Pastille Dermatofibroma lenticulare De…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Dermatofibroma?

“Cutaneous fibroma Fibroma simplex Simple fibroma of the skin, as defined above, is a benign tumor, usually appearing solitary, on the upper part of the body and the extremities, which, mainly imbedded in the skin, is only rarely and little…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Normal, Typical, Ordinary, Banal, and Common Nevus?

“A normal mole is usually less than 5 millimeters (.25 inches) in diameter. Any mole that grows larger than that size may be cancerous.” http://www.faqs.org/health/Sick-V4/Skin-Cancer.html. Accessed November 29, 2006. “When a ty…

Differential Diagnosis in Dermatopathology

Sebaceous hyperplasia vs. Nevus sebaceus of Jadassohn

An inflammatory process that develops secondary to trauma, usually in the form of a penetrating injury or rupture of a follicle, and that proceeds through stages of granulation tissue with numerous extravasated erythrocytes, granulomatous inflammati…