| NAP | nasion, point A, pogonion [convexity or concavity of the facial profile]; nerve action potential; ne... |
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| N&D | nodular and diffuse |
| NHL | nodular histiocytic lymphoma; non-Hodgkin lymphoma |
| NL | neural lobe; neutral lipid; nodular lymphoma; normal; normal libido, normal limits |
| NM | near-miss; neomycin; neuromedin; neuromuscular; neutrophil migration; nictitating membrane; nitrogen... |
| nodular syphilid | Origin: NL. So called from its gummy contents See Gum. <medicine> A kind of soft tumour, usually of syphilitic origin. Source: Websters Dictionary (01 Mar 1998) |
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| nodular transformation of the liver | A rare condition in which nodules of hyperplastic hepatocytes develop without fibrosis or general loss of lobular architecture. Synonym: nodular regenerative hyperplasia. (05 Mar 2000) |
| nodular tuberculid | A type of panniculitis characterised histologically by the presence of granulomas, vasculitis, and necrosis. It is traditionally considered to be the tuberculous counterpart of nodular vasculitis, but is now known to occur without tuberculous precedent. It is seen most commonly in adolescent and menopausal women, is initiated or exacerbated by cold weather, and typically presents as one or more recurrent erythrocyanotic nodules or plaques on the calves. The nodules may progress to form indurations, ulcerations, and scars. (12 Dec 1998) |
| nodular vasculitis | Chronic or recurrent nodular lesions of subcutaneous tissue, especially of the legs of older women, with lobular panniculitis, granulomatous inflammation with multinucleated giant cells, focal necrosis, and obliterative inflammation of the small blood vessels, resembling erythema induratum but without evidence of associated tuberculosis. (05 Mar 2000) |
| toxic nodular goitre | <endocrinology> An enlarged thyroid gland which contains nodules which release excess thyroid hormone. This condition usually arises from long-standing simple goitre in the elderly. Symptoms of hyperthyroidism result. (12 Jan 1998) |
| focal nodular hyperplasia | <radiology> Focal nodules of normal hepatocytes, Kuppfer cells and bile ducts, F more than M, rare, benign, multiple in 20%, haemorrhage (most common complication) in only 2-3% (unlike hepatic adenoma), stellate fibrous septae (stellate scar), NM: normal or increased uptake on HIDA and sulfur colloid (12 Dec 1998) |
| localised nodular tenosynovitis | A nodule, possibly inflammatory in nature, arising commonly from the flexor sheath of the fingers and thumb; composed of fibrous tissue, lipid-and haemosiderin-containing macrophages, and multinucleated giant cells. Synonym: localised nodular tenosynovitis. (05 Mar 2000) |