null cell pituitary adenoma

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• Pituitary adenoma — Classification and external resources ICD 10 D35.2 …   Wikipedia

• null-cell adenoma — a pituitary adenoma whose cells give negative results on tests for staining and hormone secretion; although classically they were considered to be composed of sparsely granulated or degranulated (nonfunctioning) cells, some contain functioning… …   Medical dictionary

• Adenoma — A benign tumor that arises in or resembles glandular tissue. If it becomes cancerous, it is called an adenocarcinoma. * * * A benign epithelial neoplasm in which the tumor cells form glands or glandlike structures; usually well circumscribed,… …   Medical dictionary

• chromophobe adenoma — chromophobic adenoma a pituitary adenoma composed of cells that lack acidophilic or basophilic granules; this is the same entity as the more precisely named null cell a …   Medical dictionary

• nonfunctional adenoma — nonfunctioning adenoma a pituitary adenoma that does not secrete excessive amounts of any hormone; many null cell adenomas are of this type. Called also nonsecreting or nonsecretory a. and endocrine inactive a …   Medical dictionary

• syndrome — The aggregate of symptoms and signs associated with any morbid process, and constituting together the picture of the disease. SEE ALSO: disease. [G. s., a running together, tumultuous concourse; (in med.) a concurrence of symptoms, fr. syn,… …   Medical dictionary

• macroadenoma — A pituitary adenoma larger than 10 mm in diameter. * * * mac·ro·ad·e·no·ma .mak rō .ad ən ō mə n, pl mas also ma·ta mət ə an adenoma of the pituitary gland that is greater than ten millimeters in diameter * * * mac·ro·ad·e·no·ma (mak″ro… …   Medical dictionary