Dermatology Practical & Conceptual

Dermatoscopic pattern of a cylindroma

…ple irregular lobules in a jigsaw-mosaic pattern diagnostic of cylindroma (Figures 3 and 4). Figure 1. Clinical view of the cylindroma on the left parietal scalp. [Copyright: ©2014 Cohen et al.] Figure 2. Dermatoscopic view shows several scatte…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Eccrine Neoplasms?

Classification of Skin Appendage Tumors Eccrine Differentiation Eccrine nevus Eccrine duct proliferation Eccrine-centered nevus Eccrine angiomatous hamartoma Syringofibroadenoma or acrosyringeal nevus Comedo nevus of the palm, linear eccrine nevu…

Dermatology Practical & Conceptual

Dermatoscopic pattern of a spiradenoma

…ry of the aggregations. The latter feature is reminiscent of a cylindroma but the aggregates of cells are too large. Cylindroma-like features may be encountered in spiradenomas and sometimes these two entities occur together suggesting a common origi…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Origin of Adnexal Neoplasms?

“Thus one needs to bear in mind the information required of a pathologist about a particular tumour, which can be summarized as follows: 1. What is the origin of the tumour? 2. What is likely the behavior of the tumour? 3. What is the extent…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Sebaceous Epithelioma?

“Sebaceous epithelioma or sebaceoma. . . Sebaceous epithelioma, in contrast to sebaceous adenoma, grows in irregular masses and does not contain as many mature sebaceous cells.” Hashimoto K, Lever WF. Tumors of skin. In: Fitzpatrick TB…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Hyalin?

“With the high power the hyaline is seen in very varied forms, which all show the same fuchsin red reaction. The first forms a section by itself; it comprises hyaline balls of different size, which lie free between the epithelial cells, and w…

Differential Diagnosis in Dermatopathology

Study By Disease

“Blue nevus” (Jadassohn-Tièche) (Quiz #360) “Blue nevus” (Jadassohn-Tièche) (Quiz #525) “Blue nevus” (Masson’s blue neuronevus) (Quiz #359) “Collagenous” nevus, papillary dermal type* (Quiz #11…

Histologic Diagnosis of Inflammatory Skin Diseases

Factitious dermatitis and panniculitis

Factitious dermatitis and panniculitis Synonyms Self-induced skin disease Pathomimicry Dermatitis artifacta Munchhausen syndrome Dermatitis passivata Factitial lymphedema (Secretan syndrome) Malingering Self-mutilation Presentation stereotypical Age…