Search Results for: actinic squamous-cell

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Epidermal Cyst and Epidermoid Cyst?

…helium. “The commonest type of epithelial cyst of the skin is the epidermal cyst which is lined entirely by stratified squamous epithelium usually without skin appendages. . . . These cysts may arise from hair follicles, sebaceous ducts, and…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…d light. 10.38.12A: Nodular dermatitis, granulomatous + 10.38.12B: 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…

Differential Diagnosis in Dermatopathology

Discussions

…, the result being lichen simplex chronicus imposed on the longstanding photoallergic dermatitis. The face of a patient with actinic reticuloid often resembles that of a lion (leonine), as does that of some patients with lymphoma or leukemia and,…

Differential Diagnosis in Dermatopathology

Photoallergic dermatitis vs. Phototoxic dermatitis

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,…

Histologic Diagnosis of Inflammatory Skin Diseases

Lupus erythematosus

…certainly is lupus erythematosus. Lupus profundus, at first glance, may be confused for a lymphoma, such as a subcutaneous T-cell one. The presence of many plasma cells in lobules, of nuclear “dust” of lymphocytes, and of sclerosis that…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…c dermatitis This condition, complicated by signs of lichen simplex chronicus, is known also as persistent light eruption or actinic reticuloid, it, fundamentally, being a photoallergic dermatitis of long standing that has been rubbed vigorously and…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Atrophoderma?

…– Progeria, acrogeria – Congenital poikilodermas – Focal dermal hypoplasia Acquired skin atrophies – Actinic (senile) skin atrophy – Inanition atrophy – Traction and pressure atrophy – Anetodermas –…

Inguinal porokeratosis in a Japanese man

Inguinal porokeratosis in a Japanese man

…dominant pattern. Five different forms can be distinguished, including the plaque type of Mibelli, disseminated superficial actinic porokeratosis (some lesions of this type are distributed mainly in areas not exposed to the sun or appear in…

Histologic Diagnosis of Inflammatory Skin Diseases

Dermatomyositis

…diagnosis is discoid lupus erythematosus, and if there is a distinctive lobular panniculitis in which lymphocytes and plasma cells are joined by nuclear “dust” of lymphocytes, the diagnosis is discoid lupus erythematosus (lupus…