●A 22-year-old man, pectus excavatum with Marfan’s syndrome.
◇Fig.(A,B) Appearance before surgery;
◇ (C,D) appearance after Nuss procedure;
◇(E,F) chest X-ray after repair.

●Pectus excavatum (PE) is the most common congenital chest wall deformity, accounting for over 90% of all chest wall deformities, with an incidence rate of approximately 0.1%, and a male to female ratio of 4:1 .
Surgical correction is recommended because severe PE can affect the physical and psychological development of patients.
● In 1998, the American surgeon Donald Nuss, MD first reported the successful repair of 45 cases of PE over 10 years via a minimally invasive surgical procedure without osteotomy.
The Nuss procedure has the advantages of small and hidden incisions, short operative time, low blood loss, rapid recovery, and no need of cartilage or sternum resections.
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#医疗##每日一句# #小试牛刀# #医学生#
快来~快来~今日医疗备考每日一练题目已经放到了这边，速速选择你心仪的答案哈
以下关于脑脊液的说法正确的是：
A.脑脊液主要由脉络丛产生
B.脑脊液在第三脑室经室间孔到第四脑室
C.脑脊液主要对中枢神经系统起到缓冲、保护、运输代谢产物和调节颅内压的作用
D.脑脊液在侧脑室经中脑水管来到第三脑室
答案我们两点见呐
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考古
觉得大成子可能两边的小虎牙的位置都缺牙，有一边（左？前置摄像头的问题）乳牙滞留，掉了之后有个豁，另一边可能乳牙正常掉了，没啥缝。后续修了有豁的那边牙，补了一个小小的假牙，就是标注了3的那个。
（注:这个先天缺牙缺的大概率是侧切牙，就是原本从中间数的第二颗，现在标了2的那个牙更像是尖牙或是融合牙，大家可以看一下形态）
门牙有内旋，但我刚刚意识到很有可能缺一小角是外伤，刚刚还看到很多姐妹发无威亚的大成空翻多么厉害，但是大成真的得注意安全[悲伤]
当然也有可能是磨耗。
不知道当事人能否解释一下@D郑业成C [允悲][允悲][允悲]
以上一切基于本人（口腔医学生）猜测，如有错误……纯属娱乐