| precancerous | <pathology> In a very early stage of cancer development and abnormal changes occur in tissue as a pre-determinant for possible future malignancy. (31 Dec 1997) |
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| precancerous conditions | Pathological processes that tend eventually to become malignant. (12 Dec 1998) |
| precancerous lesion | A noninvasive lesion with a predictable likelihood of becoming malignant; e.g., actinic keratosis. (05 Mar 2000) |
| precancerous melanosis of Dubreuilh | An obsolete term for lentigo maligna. (05 Mar 2000) |
| Bowen's precancerous dermatosis | A persistent progressive non-elevated red scaly or crusted plaque which is due to an intradermal carcinoma and is potentially malignant. Atypical squamous cells proliferate through the whole thickness of the epidermis. The lesions may occur anywhere on the skin surface or on mucosal surfaces. The cause most frequently found is trivalent arsenic compounds. Freezing, cauterization or diathermy coagulation is often effective. (12 Dec 1998) |
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