Asymptomatic low-grade appendiceal mucinous neoplasm:A case report  

作　　者：Min-Quan Yao Yu-Peng Jiang Yuan-Yu Wang Yi-Ping Mou Jin-Xing Fan 

机构地区：[1]Department of Gastrointestinal Surgery,Tongxiang First People’s Hospital,Jiaxing 314500,Zhejiang Province,China [2]Department of General Surgery,Zhejiang Provincial People’s Hospital,Hangzhou 310014,Zhejiang Province,China [3]Endoscopy Center,Tongxiang First People’s Hospital,Jiaxing 314500,Zhejiang Province,China

出　　处：《World Journal of Clinical Cases》2024年第2期361-366,共6页世界临床病例杂志

基　　金：Scientific Research Fund of National Health Commission of China,Key Health Science and Technology Program of Zhejiang Province,No.WKJ-ZJ-2201;Key Project of Social Welfare Program of Zhejiang Science and Technology Department,“Lingyan”Program,No.2022C03099;and Clinical Research Fund Project of Zhejiang Medical Association,No.2021ZYC-A173.

摘　　要：BACKGROUND Low-grade appendiceal neoplasms(LAMN)are characterized by low incidence and atypical clinical presentations,often leading to misdiagnosis as acute or chronic appendicitis before surgery.The primary diagnostic tool for LAMN is abdominal computed tomography(CT)imaging.Surgical resection remains the cornerstone of LAMN management,necessitating en bloc tumor excision to minimize the risk of iatrogenic rupture.Laparoscopy,known for its minimal invasiveness,reduced postoperative discomfort,and expedited recovery,is a safe and reliable approach for LAMN treatment.Despite the possibility of pseudomyxoma peritonei development,appendectomy and partial appendectomy generally result in negative tumor margins and favorable outcomes,which can be attributed to the disease’s slow growth and lower malignancy.CASE SUMMARY A 71-year-old male patient was admitted to our hospital with a pelvic spaceoccupying lesion detected 1 mo prior.Physical examination showed a soft abdomen without tenderness or rebound and no palpable masses.No shifting dullness was noted,and digital rectal examination revealed no palpable mass.Enteroscopy revealed a raised,smooth-surfaced mass measuring 3.0 cm in the cecum.Abdominal contrast-enhanced CT showed a markedly thickened and dilated appendix with visible cystic shadows.Laparoscopic surgery was performed and revealed a significantly dilated appendix,leading to laparoscopic resection of the appendix and part of the cecum.Post-surgical pathologic analysis confirmed LAMN.The patient received symptomatic and supportive post-operative care and was discharged on postoperative day 4 without complications such as abdominal bleeding,intestinal obstruction,or incision infection.No tumor recurrence was observed during a 7-mo follow-up period.CONCLUSION LAMN is a rare disease that lacks specific clinical manifestations.Abdominal CT plays a crucial role in diagnosing LAMN,and laparoscopic surgery is a safe and effective diagnostic and therapeutic approach.

关 键 词：Low-grade appendiceal mucinous neoplasm Pseudomyxoma peritonei Computed tomography Laparoscopy APPENDECTOMY Case report 

分 类 号：R735.36[医药卫生—肿瘤]