Yu-Shu Yen, Li-Min Sun, Cheng-Li Lin, Shih-Ni Chang, Fung-Chang Sung and Chia-Hung Kao
Evidence suggests that hormones play a role in modifying both uterine myoma (UM) and meningioma. A number of studies have observed the positive association between these diseases. The aim of the current population-based study was to determine if women with UM are at a higher risk for meningioma.
The authors used data from the National Health Insurance system of Taiwan for the study. The UM cohort contained 281,244 women. Each woman was randomly frequency-matched with 4 women without UM, based on age, index year of diagnosis, occupation, urbanization (urbanization level was categorized by the population density of the residential area into 4 levels, with Level 1 as the most urbanized and Level 4 as the least urbanized), and comorbidity, to form the control cohort. Cox's proportional hazard regression analysis was conducted to estimate the influence of UM on the meningioma risk.
Among women with UM, the risk of developing meningioma was significantly higher (45%) than among women without UM (95% CI 1.23–1.70). The same phenomenon was observed among most age groups, but a significant difference was only seen in the middle-age range. For women with UM, further analysis did not show a significant change after myomectomy. The cumulative incidence of meningioma between groups with and without UM differed over time.
The nationwide population-based cohort study found that Taiwanese women with UM are at higher risk for developing meningioma.
Ming Li, Suxi Gu, Jianqiang Ni, Xiutong Fang, Xiaodong Zhu and Zhiyu Zhang
The authors evaluated the effectiveness of Lenke Type 2 criteria in scoliosis correction with the segmental pedicle screw (PS) technique, with emphasis on shoulder balance.
Twenty-five consecutive patients with Lenke Type 2 scoliosis (structural double thoracic curves, sidebending Cobb angle > 25°, or T2–5 kyphosis > 20°) who underwent segmental PS instrumentation were included in this study. At surgery, the patients were an average of 14.1 years of age, and the average duration of follow-up was 2.9 years. For radiological evaluation of the patients, preoperative, postoperative, and the latest available follow-up radiographs were used. The difference between right and left shoulder heights was determined to assess shoulder balance. All patients were treated with fusion of both the proximal and distal curves.
The mean preoperative proximal thoracic curve of 43° was corrected to 21° postoperatively, a 51.2% correction. The preoperative lower thoracic curve of 61° was corrected to 23°, for a 62.3% correction. The preoperative shoulder height difference of −5.92 ± 12.52 mm (range: −31 to +14 mm, negative designating a lower left shoulder) was improved to 1.52 ± 8.12 mm. Postoperatively, no patient had significant or moderate shoulder imbalance, 4 patients had minimal shoulder imbalance, and 21 patients had balanced shoulders.
Although Lenke Type 2 criteria were developed wth Cotrel-Dubousset instrumentation, they are successfully applied to determining thoracic fusion when segmental PS instrumentation is used.
Yu Lei, Yan-Jiang Li, Qi-Hao Guo, Xing-Dang Liu, Zhuang Liu, Wei Ni, Jia-Bin Su, Heng Yang, Han-Qiang Jiang, Bin Xu, Yu-Xiang Gu and Ying Mao
Chronic frontal hemodynamic disturbances are associated with executive dysfunction in adult patients with moyamoya disease (MMD). However, the impact of surgical revascularization on executive dysfunction and its underlying mechanism remains unclear. The aim of the present study was to examine the postoperative radiological correlates of cognitive improvement and thereby explore its underlying mechanism.
Fourteen patients who met the inclusion criteria were identified at Huashan Hospital, were operated on, and were successfully followed up for 6 months. Postoperative changes in cortical perfusion and regional amplitude of low-frequency fluctuations (ALFF) were examined by SPECT and resting-state functional MRI, respectively. Executive function was evaluated by 2 tests (Trail Making Test Part B and the summation of executive subtests of Memory and Executive Screening [MES-EX]). Follow-up neuropsychological outcomes were then correlated with radiological changes to identify nodes functioning as leading contributors to postoperative executive outcomes.
All patients underwent successful unilateral bypass procedures, with some operations performed on the left side and some on the right side. At the 6-month follow-up, the baseline and follow-up test scores for the different sides did not differ significantly. The group with good collaterals (Matsushima Grade A, 9 patients) exhibited significantly increased postoperative perfusion (change in [△] hemodynamics) in bilateral frontal (left, p = 0.009; right, p = 0.003) and left parietal lobe (p = 0.014). The Spearman's correlation test suggested that only the right frontal lobe exhibited significant positive postoperative radiological correlates with cognitive performance (△MES-EX vs △hemodynamics, r = 0.620, p = 0.018; △MES-EX vs △ALFF, r = 0.676, p = 0.008; △hemodynamics vs △ALFF, r = 0.547, p = 0.043). Subsequent regional ALFF analysis revealed that the right dorsolateral prefrontal cortex (DLPFC) was the only node in the responsible hemisphere to exhibit significant postoperative changes.
The results not only advance our understanding of pathological interactions of postoperative executive performance in adult MMD, but also indicate that the right DLPFC amplitude might be a quantitative predictor of postoperative executive control improvement.