PubMed · 6068491
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M Arslan. 1967. Ultrasonic selective hypophysectomy.. https://doi.org/10.1016/s0041-624x(67)80009-x
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Acromegaly is associated with changes in lipoprotein metabolism and an excess in cardiovascular mortality. We have examined low density lipoprotein (LDL) subfraction distribution in 24 patients with active acromegaly and in controls matched for age, sex and body mass index. LDL was subfractionated by density gradient ultracentrifugation. The concentration of small dense LDL-III was significantly higher in the acromegalic patients compared to the controls (94.2 +/- 44.9 versus 67.2 +/- 30.4 mg/dl, P < 0.05) and there was a concomitant reduction in the intermediate subfraction LDL-II (124.8 +/- 31.3 versus 149.9 +/- 30.0 mg/dl, P < 0.05). Univariate analysis showed that both growth hormone (GH) and insulin-like growth factor (IGF)-I correlated with LDL-III and inversely with LDL-II. Acromegalic patients were found to have lower hepatic lipase (HL) and lipoprotein lipase (LPL) activities than controls (HL: 13.29 +/- 6.56 versus 21.58 +/- 7.27 micromol FFA released/ml/h, P < 0.001: LPL: 7.22 +/- 3.04 versus 11.53 +/- 7.85 micromol FFA released/ml/h, P < 0.05) whereas plasma cholesteryl ester transfer protein (CETP) activity was significantly increased (8.15 +/- 1.81 versus 5.54 +/- 1.86 pmol/microl/h, P < 0.001). Both GH and IGF-I were significantly associated with HL, LPL and CETP activities. Multivariate analysis on this relatively small sample size showed that in normal subjects, triglyceride and HL activity were the major determinants of LDL-III. In contrast, GH and HDL were the main determinants in acromegaly, accounting for 32 and 24% in the variability of LDL-III respectively. In conclusion, GH excess has a direct effect on LDL subfraction distribution.
OBJECTIVE: To find out whether recent techniques of investigating hypophyseal adenoma (computed tomography, magnetic resonance imaging and hormonal measurements) have brought about earlier diagnosis. PATIENTS AND METHODS: The time of onset of first symptoms and the duration from first symptoms to diagnosis (anamnestic time) were determined retrospectively from clinical, endocrinological, ophthalmological and localizing data on 517 patients (311 women, 206 men) with hypophyseal adenoma. RESULTS: The most common initial symptom was oligo- or amenorrhoea, in 57.9% of women, and disturbed libido or potency in 38.5% of men. Next most common were visual field deficits (women: 11.6%, men: 26.7%), signs of acromegaly (women: 11.3%, men 18.2%) and headaches (women: 11.3%, men 15.5%). The median anamnestic time in women, 3.0 years, was significantly longer than the 2.3 years in men (P < 0.001). In hormonally inactive adenoma the corresponding times were 2.0 years in women and 1.0 year in men; in prolactinoma 4.2 years and 2.0 years; in growth-hormone secreting adenoma 5.0 years and 5.5; and in ACTH-secreting adenoma 5.0 years and 1.0 year. CONCLUSIONS: Although diagnostic techniques have greatly improved, the anamnestic time for hypophyseal adenoma is not shorter than in earlier studies. This findings underlines the need for clearly directed history-taking and for good training in endocrinology.