PHEOCHROMOCYTOMA
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  Pheochromocytoma



Pheochromocytoma

    A small tumor of chromaffin cells, usually of the adrenal medulla, but occasionally of the chromaffin tissue of sympathetic paraganglia. Functional tumors secrete catecholamines.

RELATED TERMS
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Tumor
Overgrowth of tissue.

Medulla
The inner part of an organ. The adrenal medulla is the center of the adrenal gland where epinephrine (adrenaline) is produced.

Tissue
Biological tissue is a group of cells that perform a similar function.The study of tissues is known as histology, or, in connection with disease, histopathology.The classical tools for studying the tissues are the wax block, the tissue stain, and the optical microscope, though developments in electron microscopy, immunofluorescence, and frozen sections have all added to the sum of knowledge in the last couple of decades.

Secrete
To make and give off such as when the beta cells make insulin and then release it into the blood so that the other cells in the body can use it to turn glucose (sugar) into energy.



SIMILAR TERMS
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PREVIOUS AND NEXT TERMS
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Pedunculated
Elevated, as on a stem (peduncle).

Peribronchial
Around the bronchus.

Petechia
A pinpoint, non-raised, purplish-red spot caused by intradermal or subcutaneous hemorrhage. Plural is petechiae.

Peyer's Patches
Ovoid, elevated patches of closely packed lymphoid follicles in the mucosa and submucosa of the small intestine. Also called aggregated lymphoid follicles.

Phagocyte
Any cell that ingests foreign material, other cells or microorganisms.

Pheochromocytoma

Phlebitis
Inflammation of the vein.

Pinna
The projecting part of the ear; also known as the auricle.

Pedunculated polyp
A polyp attached by a thin stalk (peduncle).

Polypoid
Resembling a polyp.

Purpura
A hemorraghic disease characterized by extravasation of blood into the tissues producing spontaneous ecchymoses and petechiae.

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