Search Results for: cysts

Histologic Diagnosis of Inflammatory Skin Diseases

Acquired epidermolysis bullosa

…mis situated beneath the subepidermal blister Fibrosis in the uppermost part of the dermis in some lesions Tiny infundibular cysts (milia) Correlation clinicopathologic A blister forms beneath the epidermis and, by electron microscopy, is seen to be…

Histologic Diagnosis of Inflammatory Skin Diseases

"Folliculitis" (Infundibulitis)

…ally, is not accompanied by comedones, but often is joined by firm papules, and on the nose by a combination of infundibular cysts and sebaceous hyperplasia (rhinophyma). Pyoderma gangrenosum often starts out as suppurative infundibulitis and…

Differential Diagnosis in Dermatopathology

Discussions

…in metastatic adenocarcinoma, often show comma-like extensions that have been compared to the shape of a tadpole. Cornifying cysts and calcification are common features of syringoma, but not, as a rule, of metastases from carcinoma. Clinically,…

Differential Diagnosis in Dermatopathology

Trichoepithelioma vs. Infundibulocystic basal-cell carcinoma

A hamartoma of epidermis, epithelial structures of adnexa, and presumably dermal elements, typified, when fully formed, by a papillated or verrucous yellowish plaque situated usually on the scalp. The condition may present itself as a solitary…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Tricho-, pilo-, folliculo- ?

…ted either to hairs or to the so-called hair disk (Haarscheibe). If a student is to understand the real nature of follicular cysts, hamartomas, and neoplasms, it is essential that differences be appreciated between the names of those lesions, on one…

Differential Diagnosis in Dermatopathology

Discussions

…sential, elements for diagnosis of it. There also may be papules, pustules, and nodules the latter representing infundibular cysts which, on rupture, became inflamed. When the inflammatory process is florid, it may eventuate, in years, in pitted or…

Differential Diagnosis in Dermatopathology

Dilated pore vs. Pilar sheath acanthoma

A hamartoma of epidermis, epithelial structures of adnexa, and presumably dermal elements, typified, when fully formed, by a papillated or verrucous yellowish plaque situated usually on the scalp. The condition may present itself as a solitary…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…le infiltrate of lymphocytes and plasma cells 9. Comedones and milia present often 9. No comedones or milia 10. Infundibular cysts and sinus tracts may be accompaniments 10. No infundibular cysts or sinus tracts 11. Telangiectasias not remarkable…

In vivo reflectance confocal microscopy features of a melanoacanthoma

In vivo reflectance confocal microscopy features of a melanoacanthoma

…ide [7]. Histopathologically, melanoacanthoma shows an epidermis usually marked by hyperkeratosis, acanthosis and horn pseudocysts, as well as islands of small basaloid cells intermingled with large dendritic melanocytes. The melanocytes are large,…

Histologic Diagnosis of Inflammatory Skin Diseases

Pattern Analysis in Historical Perspective

…nce in their ability to diagnose skin diseases other than molluscum contagiosum, fibroepithelial polyps, epidermal inclusion cysts, and analogues in obviousness, thereby prompting them either to refrain from “reading out” sections of…