A 68-year-old female complained of anal pain and bleeding for 1 day. Noticeably, she had a history of eating seasoned chicken feet as a side dish for several days, and recently experienced constipation. Digital rectal examination aggravated pain, with small, hard, contents palpable in lumen. Plain abdomen radiograph revealed massive fecal impaction. On computed tomography scan, diffusely scattered hyperdense materials were observed from the anal verge to the terminal ileum without evidence of...