26 January 2026
: Case report 
A 34-Year-Old Man With a Traumatic Penetrating Injury of the Buttock and Occult Retained Foreign Body Resulting in a High Anal Fistula Managed by Trans-Sphincteric Surgery
Unusual clinical course, Challenging differential diagnosis, Diagnostic / therapeutic accidents, Management of emergency care
Xianbao Liu ABCDEFG 1*, Weigan Lin CEF 2, Minhui Ke A 1, Xianmin Gao A 1, Ruoxuan Shi BCD 1DOI: 10.12659/AJCR.950448
Am J Case Rep 2026; 27:e950448
Figure 1 Coronal CT shows swelling of the left pelvic wall with surrounding air accumulation (red circle), which was initially diagnosed as diffuse cellulitis and pelvico-rectal abscess. Notably, a faint low-density shadow corresponding to the occult bramble foreign body was present but not identified at the time; this shadow was later confirmed to be the early manifestation of the foreign body before water absorption.