Search Results for: neoplasms

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Differential Diagnosis in Dermatopathology

Discussions

…ly vascular and edematous stroma. Despite the many changes histopathologic that apocrine and eccrine hidradenomas share, the neoplasms of wholly different nature can be distinguished from one another at a glance with scanning magnification by virtue…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…lla present often 11. No hamartomas or neoplasms with adnexal differentiation concurrent in the section of tissue 11. Benign neoplasms with adnexal differentiation (e.g., trichoblastoma) and much less commonly malignant neoplasms (e.g., sebaceous…

Differential Diagnosis in Dermatopathology

Apocrine mixed tumor vs. Eccrine mixed tumor

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

Apocrine (clear-cell) hidradenoma vs. Eccrine (poroid) hidradenoma

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…

Confusion—specimen mix-up in dermatopathology and measures to prevent and detect it

Confusion—specimen mix-up in dermatopathology and measures to prevent and detect it

…rgent diagnoses on the same neoplasm in an incisional biopsy and the subsequent re-excision specimen. However, two different neoplasms in the immediate vicinity of one another are not rare, especially in skin damaged severely by sunlight. Moreover,…

Differential Diagnosis in Dermatopathology

Discussions

…sm. Although the finding of protrusion of cytoplasm into nuclei is not specific, it is seen mostly in melanocytic and neural neoplasms. The concept of neural crest derivation of granular-cell tumor is supported further by studies utilizing…

Regressing basal-cell carcinioma masquerading as benign lichenoid keratosis

Regressing basal-cell carcinioma masquerading as benign lichenoid keratosis

…ing, it should be reserved to those lesions. If used in broader, non-specific fashion, i.e., for various types of regressing neoplasms affected by a lichenoid tissue reaction, it necessarily includes not only viral warts but also some solar…

Papillary adenocarcinoma in situ of the skin: report of four cases

Papillary adenocarcinoma in situ of the skin: report of four cases

…ermatologica. 1991;182:47-51. 33. Denianke K, Ackerman AB, The issue of eccrine versus apocrine differentiation of cutaneous neoplasms affiliated with tubules, Dermatopatholology: Practical & Conceptual. 2003;9(4). 34. Crowson AN, Magro CM, Mihm…

Differential Diagnosis in Dermatopathology

Discussions

In general, neoplasms metastatic to the skin present little difficulty in differential diagnosis from neoplasms primary in the skin. Carcinoma of the breast is an exception. If there are but a few neoplastic cells and numerous inflammatory cells…

Differential Diagnosis in Dermatopathology

Granular-cell tumor vs. Xanthoma

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…

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