摘要
Anisakiasis can involve any part of the digestive tract, but most cases reported have involved the stomach;few reports have described colonic anisakiasis. Furthermore, asymptomatic colonic anisakiasis has been reported to be very rare. A 58-year-old Japanese male asymptomatically received colonoscopy due to a fecal occult blood testing positive, and an <em>Anisakis</em> larva was removed in the ascending colon. After colonoscopy, an detailed questionings concerning eating raw fish revealed that the patient ate the liver of raw filefish 21 days before the colonoscopy. Thus, questionings concerning eating the raw fish were very important and helpful for correct diagnosis. This case report demonstrated that colonic anisakiasis can be diagnosed by colonoscopy before severe complications (intestinal obstruction, perforation, and cancer development) occur. Also, biopsy forceps could be used to remove the <em>Anisakis</em> worms, demonstrating that diagnosis and treatment can be simultaneously performed.
Anisakiasis can involve any part of the digestive tract, but most cases reported have involved the stomach;few reports have described colonic anisakiasis. Furthermore, asymptomatic colonic anisakiasis has been reported to be very rare. A 58-year-old Japanese male asymptomatically received colonoscopy due to a fecal occult blood testing positive, and an <em>Anisakis</em> larva was removed in the ascending colon. After colonoscopy, an detailed questionings concerning eating raw fish revealed that the patient ate the liver of raw filefish 21 days before the colonoscopy. Thus, questionings concerning eating the raw fish were very important and helpful for correct diagnosis. This case report demonstrated that colonic anisakiasis can be diagnosed by colonoscopy before severe complications (intestinal obstruction, perforation, and cancer development) occur. Also, biopsy forceps could be used to remove the <em>Anisakis</em> worms, demonstrating that diagnosis and treatment can be simultaneously performed.
作者
Tomoshi Takeda
Kenji Niwa
Akie Sano
Atsunori Kodama
Kuninori Hatasa
Yasunari Matsuno
Masao Kagami
Motoki Takenaka
Kohjiro Niwa
Takuji Tanaka
Tomoshi Takeda;Kenji Niwa;Akie Sano;Atsunori Kodama;Kuninori Hatasa;Yasunari Matsuno;Masao Kagami;Motoki Takenaka;Kohjiro Niwa;Takuji Tanaka(Department of Internal Medicine, Gujo City Hospital, Shimadani, Gujo City, Gifu, Japan;Section of Laboratory Medicine and Obstetrics & Gynecology, Gujo City Hospital, Shimadani, Gujo City, Gifu, Japan;Sano Internal Medicine Clinic, Naka-fukuno-cho, Seki City, Gifu, Japan;Department of Obstetrics & Gynecology, Gifu University School of Medicine, Yanagido, Gifu City, Japan;Department of Internal Medicine, Kizawa Memorial Hospital, Shimokobi, Kobicho, Minokamo City, Japan;Department of Diagnostic Pathology & Research Center of Diagnostic Pathology, Gifu Municipal Hospital, Gifu City, Japan)
