Search Results for: actinic squamous-cell

Histologic Diagnosis of Inflammatory Skin Diseases

Our Definition of “Inflammation” and “Inflammatory Disease”

…matory cells. Fourth, it may not be possible by conventional miscroscopy to determine whether particular cells, e.g., plasma cells, mast cells, histiocytes, and fibrocytes in a particular circumstance are inflammatory or neoplastic, e.g.,…

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

Photoallergic dermatitis vs. Phototoxic dermatitis

…ie, the history of trauma (in both cases) often related by patients was given weight disproportionate, as was the mixture of cell types. The line between hyperplasia and neoplasia are now known to be far fuzzier that when Virchow formulated them….

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,…

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…