Differential Diagnosis in Dermatopathology

Discussions

Both sebaceous hyperplasia and nevus sebaceus of Jadassohn consist of abnormalities of sebaceous glands but the former, as the name denotes, is a hyperplasia, whereas the latter is a hamartoma that involves not only sebaceous units, but other adnexa…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Chondrodermatitis Nodularis Helicis?

“At the dermatology meeting in Berlin, Jadassohn also indicated that changes in the cartilage can often be established clinically, especially the knobby sites on the helix that show a whitish transparence through a thinned epidermis. My expe…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Halo Phenomenon?

“This study supports the concept that the halo nevus should not be regarded as a single clinicopathological entity, but rather that the halo phenomenon occurs in a wide spectrum of nevus types exhibiting a wide spectrum of histological atypia…

Differential Diagnosis in Dermatopathology

Discussions

…pilliferum. Those infundibula of epidermis connect directly to surface epidermis. The association, episodically, between syringocystadenoma papilliferum and nevus sebaceus of Jadassohn is well established. Many authors contend that this phenomenon oc…

Differential Diagnosis in Dermatopathology

See Classification of Pigmented Lesions

…l type Nevoid hyperkeratosis of the nipple Benign neoplasms Solar lentigo, including lichen planus-like keratosis Seborrheic keratosis Malignant neoplasms Basal cell carcinoma, pigmented Solar keratosis, pigmented Melanocytic lesions Benig…

Differential Diagnosis in Dermatopathology

Syringocystadenoma papilliferum vs. Hidradenoma papilliferum

…by markedly edematous acuminate papules and edematous plaques situated mostly on the face, upper part of the trunk, and arms, especially the hands, and often accompanied by fever and leukocytosis. It may be idiopathic or a manifestation of a systemi…

Histologic Diagnosis of Inflammatory Skin Diseases

Psoriasis

…busch LR von. Psoriasis and pustuloses exanthem. Arch Dermatol Syphilol 1910;99:335–46. Bibliography for guttate parapsoriasis Brocq L. Les parapsoriasis. Ann Dermatol Syphiligr 1902; 3:433. Endlitz. Ann Dermatol Paris 1898;ix:132. Jadassohn J. Ueber…

Histologic Diagnosis of Inflammatory Skin Diseases

Pigmented Lesions

…) Proliferation of fibrocytes and histiocytes (lipophages and siderophages early in the course) in a mass in the reticular dermis, those cells appearing to be splayed between thickened bundles of collagen at the lateral margins. Melanin increased in…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Sebaceous hyperplasia Nevus sebaceus of Jadassohn 1. Dome-shaped papule with a central cell 1. Relatively flat-topped plaque in early stage; papillated or digitated plaque in fully developed and later stages; no dell 2. Basket-woven pattern of…

Histologic Diagnosis of Inflammatory Skin Diseases

Lymphocytoma cutis

…Dermatol 1980;116:1142–46. Fendt H. Beiträge zur Kenntnis der sogenannten sarcoiden Geschwülste der Haut. Arch Dermatol Syphilol 1900;53:213. Hirsch P, Lukes R. Reactive pseudolymphoma, nodular type. Arch Dermatol 1965;91:408. Jadassohn J. Vorstellu…