| borderline hypertension | By consensus, that blood pressure zone between highest acceptable "normal" blood pressure and hypertensive blood pressure. The Framingham Heart Study defines this as pressures between 140 and 160 mm Hg systolic and 90 and 95 mm Hg diastolic. (05 Mar 2000) |
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| borderline leprosy | A form of leprosy that is very unstable immunologically; the cutaneous nerves frequently present bacilli, but the lepromin test is usually negative; cutaneous lesions are comprised of flat bands or plaques. Synonym: dimorphous leprosy. (05 Mar 2000) |
| borderline personality | See: borderline personality disorder. (05 Mar 2000) |
| borderline personality disorder | <psychiatry> An individual who is impulsive and unpredictable with fluctuations in intense moods. Occasionally psychotic. (27 Sep 1997) |
| borderline tumour | A neoplasm of the ovary, usually arising in young women, composed of complex epithelial hyperplasia without stromas invasion; may recur if incompletely removed surgically, but is clinically less aggressive than carcinoma. Synonym: low malignant potential tumour. (05 Mar 2000) |
| leprosy, borderline | A form of leprosy in which there are clinical manifestations of both principal types (lepromatous and tuberculoid). The disease may shift toward one of these two polar or principal forms. (12 Dec 1998) |
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