Variants of Spitz nevus Variants Reference Angiomatoid Spitz nevus (a) 2, 3 Atypical pigmented spindle cell nevus (b) 4, 5 Atypical Spitz nevus (c) 4, 5 Desmoplastic Spitz nevus (d) 6, 7 Hyalinizing Spitz nevus (e) 1 Malignant Spitz nevus (f) 5, 8 Pagetoid Spitz nevus 5, 9 Pigmented spindle cell nevus 4, 10, 11 Recurrent Spitz nevus 12 Spitz nevus with florid pseudoepithelial 13 hyperplasia Spitz nevus with halo phenomenon 14 Tubular epithelioid cell
nevus (g) 15 (a) Several investigators consider angiomatoid Spitz nevus to be a variant of desmoplastic Spitz nevus.
Perivascular epithelioid cell
neoplasms of soft tissue and gynecologic origin: a clinicopathologic study of 26 cases and review of the literature.
Melanocytic nevi with an atypical epithelioid cell
component: clinical, histopathologic, and fluorescence in situ hybridization findings.
7] E-AML tumours are comprised of round to polygonal epithelioid cells
with clear or granular eosinophilic cytoplasm intermixed with spindle cells, often showing varying degress of mitotic activity.
There were significant associations related to ciliary body involvement, the presence of epithelioid cell
type, the TNM stages, and the presence of metastasis (Table 1).
The tumors are generally hypercellular, made up of spindle cells and epithelioid cells
The second component showed groups and bundles of spindled to epithelioid cells
interspersed among the former.
In the tuberculoid form, lesions are granulomatous with few organisms, extensive epithelioid cells
, giant cells, and lymphocytic infiltration (7).
Disseminated histiocytic infiltration of either aggregates or sheets of epithelioid cells
containing acid-fast bacilli, in the absence of caseous necrosis, were observed in different organs of the infected doves, especially lungs (23/23), intestines (9/23).
showed dense cytoplasm and distinct cell borders (Figure 2).
Microscopic examination of the air-dried, Diff-Quik-stained smear revealed a cellular population of malignant-appearing epithelioid cells
arranged predominantly in a discohesive to loosely cohesive pattern (Figure 1).
Angiomyolipoma (AML) are benign tumours composed of varying amounts of thick-walled dysplastic blood vessels, smooth muscle and mature adipose tissue derived from epithelioid cells
Revised histopathologic examination of the biopsy specimen showed a dermal inflammatory infiltrate of histiocytes containing numerous intracellular Leishmania amastigotes and epithelioid cells
, lymphocytes, and few plasma cells (Figure, panel B).
Presence of macrophages, epithelioid cells
and langhans type of giant cells were predominantly found.
Currently, GISTs are defined as GI tract mesenchymal tumors containing spindle or epithelioid cells
that mark positive for kit protein (CD 117).