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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

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
Farlex Partner Medical Dictionary © Farlex 2012

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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

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.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

pleomorphism

Taking different physical forms. Also known as polymorphism.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

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.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
This study also confirmed that if the biopsy does not have nuclear pleomorphism, loss of polarity, or cribriforming glands, it should not be diagnosed as HGD or carcinoma.
A central single assessment of less than 1/400 of the total number of endothelial cells in an eye with keratoconus may miss polymegathism, pleomorphism, and endothelial cell damage in the region of eccentric cone since the sample observed might not be representative.
Fibrosarcoma shows a herring-bone-like growth pattern, denser cellularity, greater nuclear pleomorphism, higher mitotic counts and lacks abundant collagen bands.
High power view of the tumor in the esophageal wall (b) showed the above- mentioned cells with bland looking nuclei without any atypia or pleomorphism (H&E x400).
NUMEROUS KERATIN PEARLS AND FEW MITOTIC FIGURES WITH CELLULAR AND NUCLEAR PLEOMORPHISM AND HYPERCHROMATISM WEREALSO SEEN, ADIAGNOSIS OF WELL-DIFFERENTIATED SQUAMOUS CELL CARCINOMA WAS GIVE (H&E 20X).
Keywords: Glaucoma; Corneal endothelium; Corneal endothelial cell density; Pleomorphism; Polymegathism; Selective laser trabeculoplasty; Confocal microscopy
Nuclear pleomorphism was seen in 21 (58.3%) cases and was semiquantitatively assessed to be mild in 7 (19.4%), prominent in 11 (30.6%) and marked in 3 (8.3%) cases.
Microscopically, the tumor consisted of spindle cells arranged in bundles or incidentally, with elongated, oval, or thickened, hyperchromatic nuclei, with pleomorphism. The mitotic activity was low, the cellularity was low to mild, and there were a lot of myxoid substances with aggregation of inflammatory cells around the spindle cells.
As with most histologic specimens, presence of the following increases likelihood of malignancy: necrosis, spindling, vesicular nuclei with large nucleoli, increased mitotic activity, high nuclear to cytoplasmic ratio, and pleomorphism. (8) Wide local excision is the treatment of choice for benign GCT.
Necrosis, nuclear pleomorphism, and mitotic activity were not detected.
STIC lesions exhibit histologic features of morphologic atypia (increased nuclear/cytoplasmic ratio, prominent nucleoli, increased proliferation with an intact basement membrane, variably stratified fallopian tube epithelium with nuclear pleomorphism) and have evidence of TP53 mutations (J.