Search Results for: neoplasms

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Basal-Cell Carcinoma Common in Nevus Sebaceus?

…carcinoma in situ of the epidermis. In: Farmer E, Hood A. Pathology of the Skin. 2nd ed. New York: McGraw-Hill, 2000. “Neoplasms arise commonly in association with nevus sebaceus. The most common neoplasms observed are basal cell carcinoma…

Extraocular sebaceous carcinoma: a series of three cases with varied presentation

Extraocular sebaceous carcinoma: a series of three cases with varied presentation

…sity may be explained by the common embryologic origin of the folliculo-sebaceous-apocrine unit being recapitulated in their neoplasms, as well. These tumours are known to be great mimics of different types of neoplasms, which often makes the right…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Nuclear Atypia, Cytoplasmic Atypia, and Architectural Atypia?

…is normal skin. Both cutaneous melanocytic nevi and melanomas display architectural atypia because both (like all cutaneous neoplasms) are deviations from normal skin. Ironically, in cutaneous pathology, nuclear atypia is irrelevant to a decision…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Invasion by Neoplastic Cells?

…tend to be asymmetrical, poorly circumscribed, and neither oriented vertically nor wedge-shaped. As a rule, nuclei of benign neoplasms are monomorphic and not crowded, whereas those of malignant neoplasms are pleomorphic and crowded. The concept of…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Inverted Follicular Keratosis, Tricholemmoma, and Desmoplastic Tricholemmoma?

…n B. Helwig) tricholemmoma (John T. Headington), and desmoplastic tricholemmoma (Daniel Santa Cruz) as distinctive cutaneous neoplasms. We aver that those three conditions are not neoplasms, but hyperplasias of infundibula consequent to infection by…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Borderline, Minimal Deviation, and Nevoid Melanomas?

…is yet another transparent attempt from assuming responsibility for ones mistakes. In brief, there are no minimal deviation neoplasms or borderline neoplasms. Those terms are circumlocutions and evasions. The obligation of histopathologists is to…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Tricho-, pilo-, folliculo- ?

…s RSM Jr, Helwig EB. Pilomatricoma (calcifying epithelioma). Arch Dermatol 1961;83:606-618. “Classification of primary neoplasms of the hair follicle I. Neoplasms of the outer hair sheath Tricholemmoma a. clear cell type b. intermediate cell…

The order of things and the classification of melanoma

The order of things and the classification of melanoma

…; which belongs to the class of “melanocytic neoplasms,” which are part of the kingdom of “neuroectodermal neoplasms,” which belong to the universe of “neoplasms.” As science progresses, the era of morphology is…