Differential Diagnosis in Dermatopathology

Differential Diagnosis

…into subcutaneous fat and sometimes into fascia and skeletal muscles 3. “Cysts” always predominates 3. “Cysts” do not always predominate 4. “Cysts” distributed uniformly throughout the lesion 4. “Cysts&#…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…muscle in the wall of vein-like structures often 5. No smooth muscles in the wall of vessels 6. Abundant mucin in the wall of vein-like structures 6. No mucin in the wall of vessels 7. Plump endothelial cells, some of them polygonal, protrude far…

Histologic Diagnosis of Inflammatory Skin Diseases

Alopecia areata, totalis, universalis

…No lower segment (i.e., bulb and stem) of follicles apparent Muscles of hair erection intact Correlation clinicopathologic Because most of the follicles in a lesion of alopecia areata and analogues of it enter catagen together at the same time, hai…

Histologic Diagnosis of Inflammatory Skin Diseases

Study By Disease

…with infection by herpesvirus (Quiz #664) Hamartoma of smooth muscles, hair follicles, and collagen bundles (Quiz #113) Hemangioma associated with prurigo nodularis (Quiz #413) Hemangioma, labial (Quiz #726) Hemangioma, superficial (Quiz #429) Hemorr…

Differential Diagnosis in Dermatopathology

Morphea, late stage vs. Collagenous nevus

…ecome atrophic on the dorsum of the joints of fingers, and in muscles as weakness, especially of shoulder and pelvic girdles. The disease seems to be immunologic in character and, in adults, is often a response to a malignant neoplasm situated in an…

Differential Diagnosis in Dermatopathology

Angiolymphoid hyperplasia with eosinophilia vs. Kimura’s disease

…ecome atrophic on the dorsum of the joints of fingers, and in muscles as weakness, especially of shoulder and pelvic girdles. The disease seems to be immunologic in character and, in adults, is often a response to a malignant neoplasm situated in an…

Differential Diagnosis in Dermatopathology

Trichoadenoma vs. Microcystic adnexal carcinoma

…ecome atrophic on the dorsum of the joints of fingers, and in muscles as weakness, especially of shoulder and pelvic girdles. The disease seems to be immunologic in character and, in adults, is often a response to a malignant neoplasm situated in an…

Differential Diagnosis in Dermatopathology

Discussions

…crine glands and ducts, however, are preserved, as are smooth muscles of hair erection. Morphea is an inflammatory process, whereas a collagenous nevus is a hamartoma. A residuum of a once dense infiltrate of lymphocytes and plasma cells may be prese…