| mediastinal pleura | The continuation of the costal pleura passing from the sternum to the vertebral column which covers the side of the mediastinum. Synonym: pleura mediastinalis. (05 Mar 2000) |
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| mediastinal pleurisy | Inflammation of the portion of the pleura lining the mediastinal surface of the lung. (05 Mar 2000) |
| mediastinal space | <anatomy> The space in the thoracic cavity behind the sternum and in between the two pleural sacs (containing the lungs). (27 Sep 1997) |
| mediastinal surface of lung | The part of the medial surface of a lung in contact with the mediastinum. Synonym: pars mediastinalis pulmonis, facies mediastinalis pulmonis, mediastinal part of lung. (05 Mar 2000) |
| mediastinal veins | Several small veins from the mediastinum emptying into the brachiocephalic veins or the superior vena cava. Synonym: venae mediastinales. (05 Mar 2000) |
| middle mediastinal mass | <radiology> Mnemonic: not VD, 90% malignant, Nodes, tumour (metastasis, lymphoma/leukaemia), infection, inhalational disease, Castleman disease, Tumour, primary lung, trachea, oesophagus carcinoma, Vascular, aneurysm, haematoma, Duplication cyst, bronchogenic, enteric, neurenteric (12 Dec 1998) |
| posterior mediastinal arteries | Numerous small arteries supplying the pleura and lymph nodes of the posterior mediastinum. Synonym: rami mediastinales aortae thoracicae, posterior mediastinal arteries. (05 Mar 2000) |
| posterior mediastinal mass | <radiology> Mnemonic: HALOVEEN, haematoma, abscess, lymph nodexs, osteophyte, vertebral (metastasis, plasmacytoma), extramedullary haematopoesis, oesophagus, neurogenic (12 Dec 1998) |
| adrenal hyperplasia | <pathology> A condition of diffuse enlargement of the adrenal glands. Origin: Gr. Plassein = to form (27 Sep 1997) |
| adrenal hyperplasia, congenital | A group of inherited disorders of adrenal steroidogenesis, the physical expression of which varies with the sex of the patient, the severity of the congenital enzyme defect, and the age at which the defect makes its presence felt. The most common form, the simple virilizing form, is due to a 21-hydroxylase deficiency. There is also a salt-losing form (a more complete 21-hydroxylase deficiency), a hypertensive form (11-hydroxylase deficiency), a 17-hydroxylase deficiency form, a desmolase deficiency form, and a 3-beta-hydroxysteroid deficiency form. (12 Dec 1998) |
| angiolymphoid hyperplasia with eosinophilia | Solitary or multiple benign cutaneous nodules comprised of immature and mature vascular structures intermingled with endothelial cells and a varied infiltrate of eosinophils, histiocytes, lymphocytes, and mast cells. (12 Dec 1998) |
| atypical melanocytic hyperplasia | Proliferation of melanocytes showing nuclear atypicality, especially as scattered single cells high in the epidermis; interpreted by some pathologists as malignant melanoma in situ. (05 Mar 2000) |
| basal cell hyperplasia | Increase in the number of cells in an epithelium resembling the basal cells. (05 Mar 2000) |
| benign prostatic hyperplasia | <urology> A benign enlargement of the prostate gland begins normally after age 50 years probably secondary to the effects of male hormones. If significant enlargement occurs, it may pinch off te urethra making urination difficult or impossible. See: urinary retention. Origin: Gr. Plassein = to form (06 Aug 1998) |
| verrucous hyperplasia | A non-invasive precursor of verrucous or squamous carcinoma of the oral mucosa, occurring in the elderly, characterised by sharp or blunt upward papillary projections of squamous epithelium. (05 Mar 2000) |