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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.
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Adj.1.pleomorphic - relating to or characterized by pleomorphism
References in periodicals archive ?
Pleomorphic LCIS and florid LCIS are morphologic variants of LCIS that have been identified and increasingly studied in the past few decades with the advent and routine use of E-cadherin immunohistochemistry (Table).
Biopsy of the lesion will show hyperchromatic, pleomorphic tumor cells that dissect between collagen bundles with endothelial cells that are multilayered along with hemorrhage.
However, in salivary masses, pleomorphic adenoma was more common in females whereas sialadenitis of the submandibular gland was more common in males.
On microscopy, the lesion was identified as a pleomorphic adenoma (figure 4).
Histopathology revealed pleomorphic tumor cells with pleomorphic round to oval eccentric nuclei, prominent eosinophilic nucleoli, multinucleate giant cells with intracytoplasmic melanin pigment, and atypical mitotic figures (Figure 2b).
Spinal Pleomorphic Xanthoastrocytoma: Case Report and literature review
Paraffin embedded blocks and detailed clinical data of 63 cases of pleomorphic adenoma reported at local tertiary care hospitals from Jan.
Conclusion: Pleomorphic adenoma was the commonest benign salivary gland tumor and mucoepidermoid carcinoma was the commonest malignant tumor.
But his determination to fight on has inspired the kind-hearted community who have made donations to help towards his battle with some going towards the Christie Hospital in Manchester where he's being treated for pleomorphic soft tissue sarcoma - a rare type of cancer.
Pleomorphic adenoma (PA) is reported to be commonest benign neoplasm of salivary glands in Pakistan constituting 80-90% of all benign salivary gland tumours while mucoepidermoid carcinoma (MEC) and adenoid cystic carcinoma (AdCC) constitute 44% and 31% of all malignant salivary gland neoplasms.
He underwent surgery in May last year for pleomorphic liposarcoma only for two new tumours to be found months later.
He had surgery in May last year, which doctors hoped would rid him of pleomorphic liposarcoma.