Crypt abscesses.
D004804:Eosinophils / Q000166:cytology*; D006801:Humans; D007413:Intestinal Mucosa / Q000473:pathology*; D011832:Radiation Injuries / Q000473:pathology*; D011878:Radiotherapy / Q000009:adverse effects; D012002:Rectal Diseases / Q000209:etiology / Q000473:pathology*