substernal thyroid

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• retrosternal thyroid — substernal thyroid an accessory thyroid gland or thyroid tissue situated in the thorax behind the sternum …   Medical dictionary

• test — 1. To prove; to try a substance; to determine the chemical nature of a substance by means of reagents. 2. A method of examination, as to determine the presence or absence of a definite disease or of some substance in any of the fluids, tissues,… …   Medical dictionary

• goiter — A chronic enlargement of the thyroid gland, not due to a neoplasm, occurring endemically in certain localities, especially regions where glaciation occurred and the soil is low in iodine, and sporadically elsewhere. SYN: struma (1). [Fr. from L.… …   Medical dictionary

• ICD-9-CM Volume 3 — is a system of procedural codes. It is a subset of ICD 9 CM (volumes 1 and 2 are used for diagnostic codes.) The United States National Center for Health Statistics drafted ICD 10 PCS in 2000 as a potential replacement for ICD 9 CM Volume 3, but… …   Wikipedia

• Oxygen toxicity — Classification and external resources In 1942–43 the UK Government carried out extensive testing for oxygen toxicity in divers. The chamber is pressurised with air to 3.7  …   Wikipedia

• Mediastinal tumor — Classification and external resources Micrograph of the primitive neuroepithelium of an immature teratoma of the mediastinum. H E stain …   Wikipedia