Search Results for: collagenous spherulosis

Differential Diagnosis in Dermatopathology

Discussions

…oriented oblique to the epidermis. Minor deviations from arrangement parallel do not in themselves imply the existence of a collagenous nevus. In a true collagenous nevus, though, malaligned bundles of collagen are numerous, the condition often…

Keratotic papules of palms and soles

Keratotic papules of palms and soles

…ith the presence of elastorrhexis in acrokeratoelastoidosis, which is absent in focal acral hyperkeratosis [5]. Degenerative collagenous plaques of hands instead affect sun-damaged skin with symmetrical papules and plaques clustered on thumb, first…

Study By Disease

Study By Disease

…221; (Masson’s blue neuronevus) (Quiz #359) “Collagenous” nevus, papillary dermal type* (Quiz #111) “Collagenous” nevus, papillary dermal type* (Quiz #441) “Collagenous” nevus, papillary dermal type* (Quiz…

Histologic Diagnosis of Inflammatory Skin Diseases

Polymorphous light eruption

…lary dermis whose delicate bundles of collagen still are connected, albeit tenuously, to the epidermis. Only when those fine collagenous connections to the epidermis have been broken can a subepidermal blister be said to have formed. Contrary to our…

Histologic Diagnosis of Inflammatory Skin Diseases

Collagen

…lagen and to collagen of blood vessels. Type XVII collagen is a transmembrane protein characterized by alternating segments, collagenous and noncollagenous. It was recognized initially as the 180 KDa bullous pemphigoid antigen 2, a constituent of…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Nevus?

…n congenital melanocytic nevi), of keratocytes (e.g., in epidermal nevi), of elements of connective tissue mostly, (e.g., in collagenous nevi, nevus flammeus, and nevus lipomatosus), and of a mixture of elements epithelial and nonepithelial (e.g.,…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Hyalin?

…l bodies)… are examples of intracellular hyaline deposits. Extracellular hyalin has been somewhat more difficult to analyze. Collagenous fibrous tissue in old scars may appear hyalinized … In long-standing hypertension and diabetes mellitus, the…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Chondrodermatitis Nodularis Helicis?

…oepitheliomatous hyperplasia. Below the ulcer there is histologic evidence of perichondritis and degenerative changes of the collagenous tissue.” Mehregan AH, Hashimoto K, Mehregan DA, et al. Pinkus’ Guide to Dermatohistopathology, 6th…