5) The histogenesis
of primary osteosarcoma of the breast has not been fully elucidated, though an origin from totipotent mesenchymal cells of the breast stroma or a transformation from a pre-existing fibroadenoma or phyllodes tumor have been suggested.
There are 2 main theories on the histogenesis
of primary NETs of the breast.
Intestinal-type adenocarcinoma of the larynx: Report of a rare aggressive phenotype and discussion of histogenesis
has not been fully elucidated (9).
Immunohistochemistry was performed with markers like keratin, vimentin and HMB-45 to know the histogenesis
Although the histogenesis
and pathogenesis of xanthogranulomas still remain unclear, it has been generally postulated that xanthogranuloma is granulomatous degeneration induced by chronic inflammatory processes, hemorrhage, or infarction in circumscribed area.
Molecular analysis of immunoglobulin variable genes in human immunodeficiency virus-related non-Hodgkin's lymphoma reveals implications for disease pathogenesis and histogenesis
of this condition is still poorly understood.
There are several theories on the histogenesis
of teratomas, but it is now believed that benign cystic ovarian teratomas are parthenogenetic tumors that develop from a single germ cell that had completed its first, but not its second meiotic division, causing gene disruption that triggers signaling defects in either oocytes or in the surrounding follicular granulosa cells (BALAKRISHNAN & CHAILLET, 2013).
Intravenous leiomyomatosis with uterine leiomyoma and adenomyosis: a case presentation and brief comment on the histogenesis
1,2) The histogenesis
of extragonadal GCT is unknown.
of the development of these cysts is unclear with several proposed theories of origin including caudal growth of the developing mesonephric duct, ectopic ovarian tissue, a secondary Mullerian system, and endometriosis [3, 5].