| 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) |
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| 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 lymph nodes | Nodes located along the thoracic aorta; they receive vessels from the oesophagus, diaphragm, liver and pericardium and send efferents to the thoracic duct and bronchomediastinal lymphatic trunk(s). Synonym: nodi lymphatici mediastinales posteriores. (05 Mar 2000) |
| posterior mediastinal mass | <radiology> Mnemonic: HALOVEEN, haematoma, abscess, lymph nodexs, osteophyte, vertebral (metastasis, plasmacytoma), extramedullary haematopoesis, oesophagus, neurogenic (12 Dec 1998) |
| African endomyocardial fibrosis | Fibrosis of the inner layers of the myocardium, often including the endocardium, causing diastolic restriction of the heart; indigenous to East Africa. (05 Mar 2000) |
| radiation fibrosis | The formation of scar tissue as a result of radiation therapy to the lung. (12 Dec 1998) |
| replacement fibrosis | The formation of fibrous tissue that occupies sites where various other cells and tissues have become atrophied, or degenerated and necrotic. (05 Mar 2000) |
| retroperitoneal fibrosis | <radiology> Ureters tapered or obstructed, most severe at L4-5, ureters deviated medially, Treatment: symptomatic; steroids have ? long-term benefit Differential diagnosis: malignancy, lymphoma (especially Hodgkin's), metastasis from colon and breast, retroperitoneal sarcoma, drugs, methysergide (Sansert), haemorrhage, aortic aneurysm, trauma or surgery, inflammation, Crohn's disease, diverticulitis, pancreatitis, extravasated urine, radiation (12 Dec 1998) |
| pericentral fibrosis | Fibrosis occurring around the central veins in the hepatic lobules. (05 Mar 2000) |
| perimuscular fibrosis | Fibrosis in the outer media of arteries, usually the renal arteries of young women, where it causes segmental stenosis and hypertension; a variety of fibromuscular dysplasia. Synonym: subadventitial fibrosis. (05 Mar 2000) |
| pipestem fibrosis | A characteristic pipe-shaped fibrosis formed around hepatic portal veins in some cases of long-continued heavy infection with Schistosoma mansoni; thought to be induced by the presence of large numbers of schistosome eggs in the hepatic tissues. Synonym: Symmers' clay pipestem fibrosis, Symmers' fibrosis. (05 Mar 2000) |
| congenital fibrosis of the extraocular muscles | An autosomal dominant disorder associated with blepharoptosis and absence of eye movements. (05 Mar 2000) |