Early maternal hypothyroxinemia altars histogenesis
and cerebral cortex cytoarchitecture of the progeny.
Controversies Regarding Histogenesis
: The source of origin of lateral periodontal cysts remains controversial, with extensive debate in the literature over whether the lesion derives from the dental lamina, reduced enamel epithelium, or rests of Malassez.3 Due to the morphologic similarity between the lateral periodontal cyst's epithelial lining, reduced enamel epithelium, and the presence of focal epithelial thickenings similar to that seen in the lining of dentigerous cysts, it has been hypothesized that the source of derivation is the reduced enamel epithelium of an erupting tooth.
John's intellectual and visionary input in the field of salivary gland histogenesis
and tumorigenesis has clearly been valued, and his scholarly publications have advanced the diagnosis and management of these tumors.
They are composed of stromal cells of unknown histogenesis
and many capillaries (9).
It was suggested that extraskeletal osteosarcomas might represent malignant growth of a single component in a teratoma.[sup.23] Chitiyo listed 4 possible methods of histogenesis
: (1) metaplasia of the bladder epithelium; (2) stromal metaplasia; (3) transfer of osteoblasts via blood stream; or (4) the development of osteoblasts from immature mesenchymal tissue derived from the Wolfian body from which the trigone develops.[sup.6] Kikuchi and colleagues suggested that the frequent location of these tumours in the trigone is evidence of an origin from the Wolfian body.[sup.19] In our case, the tumour was located near the trigone and can supports Kikuchi's hypothesis.
Alveolar soft-part sarcoma: A review of the pathology and histogenesis
. Ultrastruct Pathol.
Primary giant-cell tumor of the salivary gland is a rare lesion with an incompletely characterized histogenesis
. To the best of our knowledge, only 16 cases have been previously documented in the English-language literature.
We discuss the histogenesis
of these tumors; the common vascular origin and the mutual transformation of these two rumors suggest that the hemangiopericytoma may also have developed during occupational exposure to high concentrations of vinyl chloride monomer.
of colorectal adenomas: origin in the monocryptal adenoma and initial expansion by crypt fission.
of AT has been a matter of debate for many years with the proposed cells of origin being endothelial, mesothelial, mesonephric, mullerian and epithelial (8).
of these tumours is still debatable.