| nelson syndrome | <syndrome> A syndrome characterised by deep pigmentation and the presence of an acth-msh secreting adenoma of the pituitary gland developing after adrenalectomy for cushing's syndrome. at present it is not known whether the adenoma occurs de novo or represents enlargement of a previously undetected tumour. (12 Dec 1998) |
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| Nelson tumour | A pituitary tumour causing the symptoms of Nelson syndrome. (05 Mar 2000) |
| Nelson, Don | <person> U.S. Internist, *1925. See: Nelson syndrome, Nelson tumour. (05 Mar 2000) |