Il linfonodo di Virchow o nodo segnale è un linfonodo nella fossa sopraclavicolare sinistra alimentato da linfoghiandole che passano dalla cavità addominale. Fu battezzato la sede del diavolo a causa delle associazioni possibili con le malattie maligne come i tumori dell'apparato digestivo. L'aumento di volume di quest'area ha indicazioni cliniche e semeiotiche importanti: 1a linfoadenopatia con un nodo duro (segno di Troisier) si associa a possibili tumori gastrici che possano dare linfoadenopatia paraneoplastica e per questo motivo viene anche chiamato nodo sentinella.

Abstract

OBJECTIVE: To observe the effect of acupuncture of Zusanli (ST 36) on electroencephalogram (EEG) so as to probe into its law in regulating the interconnectivity of brain functional network.
METHODS: A total of 9 healthy young volunteer students (6 male, 3 female) participated in the present study. They were asked to take a dorsal position on a test-bed. EEG signals were acquired from 22 surface scalp electrodes (Fp1, Fp2, F7, F3, F2, F4, F8, A1, T3, C3, C2, C4, T4, A2, T5, P3, P2, P4, T6, O2, O1 and O2) fixed on the subject's head. Acupuncture stimulation was applied to the right Zusanli (ST 36) by manipulating the filiform needle with uniform reducing-reinforcing method and at a frequency of about 50 cycles/min for 2 min. Then the stimulation was stopped for 10 min, and repeated once again (needle-twirling frequency: 150 and 200 cycles/min), 3 times altogether.

Background. The present study was designed to evaluate if electro-acupuncture (EA) could affect oligo-/anovulation and related endocrine and neuroendocrine parameters in women with polycystic ovary syndrome (PCOS). Methods. Twenty-four women (between the ages of 24 and 40 years) with PCOS and oligo-/amenorrhea were included in this non-randomized, longitudinal, prospective study. The study period was defined as the period extending from 3 months before the first EA treatment, to 3 months after the last EA treatment (10-14 treatments), in total 8-9 months. The menstrual and ovulation patterns were confirmed by recording of vaginal bleedings and by daily registrations of the basal body temperature (BBT). Blood samples were collected within a week before the first EA, within a week after the last EA and 3 months after EA. Results. Nine women (38%) experienced a good effect. They displayed a mean of 0.66 ovulations/woman and month in the period during and after the EA period compared to a mean of 0.15 before the EA period ( p =0.004). Before EA, women with a good effect had a significantly lower body-mass index (BMI) ( p <0.001), waist-to-hip circumference ratio (WHR) ( p =0.0058), serum testosterone concentration ( p =0.0098), serum testosterone/sex hormone binding globulin (SHBG) ratio ( p =0.011) and serum basal insulin concentration (p=0.0054), and a significantly higher concentration of serum SHBG ( p =0.040) than did those women with no effect. Conclusion.