pleomorphism


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pleomorphism

 [ple″o-mor´fizm]
the assumption of various distinct forms by a single organism or within a species. adj., adj pleomor´phic, pleomor´phous.

pol·y·mor·phism

(pol'ē-mōr'fizm),
Occurrence in more than one form; existence in the same species or other natural group of more than one morphologic type.
Synonym(s): pleomorphism

pleomorphism

/pleo·mor·phism/ (-mor´fizm) the occurrence of various distinct forms by a single organism or within a species.pleomor´phicpleomor´phous

pleomorphism

(plē′ə-môr′fĭz′əm)
n.
1. Chemistry See polymorphism.
2. Biology The occurrence of two or more distinct forms, as of an organism during its life cycle or of cells of a certain type.

ple′o·mor′phic adj.

pol·y·mor·phism

(pol'ē-mōr'fizm)
Occurrence in more than one form; existence in the same species or other natural group of more than one morphologic type.
Synonym(s): pleomorphism.

pleomorphism

Taking different physical forms. Also known as polymorphism.

pol·y·mor·phism

(pol'ē-mōr'fizm)
Occurrence in more than one form; existence in same species or other natural group of more than one morphologic type.
Synonym(s): pleomorphism.

pleomorphism (plē´əmôr´fiz´əm),

n the ability to change shape or form.

pleomorphism

having more than one shape or form.
References in periodicals archive ?
Nest of Tumour Cells in a Pool of Extracellular Mucin with Small Dark Nuclei showing Mild Pleomorphism (HPE- H and E) 40X (HPE: 186/12)
The automatic endothelial analysis gives the density plus polymegathism and pleomorphism indices, which makes Confoscan-4 a more objective device in the evaluation of corneal endothelium than other confocal microscopes.
Histochemical studies showed a neoplasm made up of glial cells with nuclear pleomorphism and eosinophilic cytoplasm arranged in sheets.
In the present study we have investigated the changes in the endothelial cell count and cell's polymegathism and pleomorphism after SLT in OAG.
Occurrence of atypia may take the form of cellular pleomorphism of the basaloid cells, large polygonal squamoid cells, with pale vesicular nuclei, increased and abnormal mitotic figures, presence of granular cells and clear cells, and spindle-shaped de-differentiation.
Malignancy is usually suggested if high mitotic activity, increased cellularity, pleomorphism, nuclear atypia, blood vessel infiltration, and tumor necrosis are shown histologically [1-3, 6].
Histologically, the tumour shows intersecting fascicles of spindle cells with cigar-shaped nuclei and eosinophilic cytoplasm without significant nuclear pleomorphism or tumour necrosis.
The characteristic cytomorphologic features noted correspond to the histologic features and include large polygonal to round cells with granular to flocculent cytoplasm, well defined cell borders, mild nuclear pleomorphism, vesicular nuclei, perinuclear clearing, and small to indistinct nucleoli.
Less differentiated areas in the tumor showing less keratinization and more nuclear pleomorphism is shown in Fig.
The proportion of endothelial cells that are hexagonal can be quantified by specular microscopy, with clinically significant pleomorphism arising if the hexagonal cell density is less than 50%.
The pathologic examination of the surgical specimen from neck dissection shows numerous multinucle ated osteoclast-like giant cells within cellular and vascular stroma containing plump, oval mononuclear cells with nuclei similar to giant cells (Figure 3); expansile and infiltrative growth; frequent mitotic figures; secondary cystic degeneration, reactive bone formation; no cytologic atypia or pleomorphism.