| Intestinal symptoms |
| Abdominal pain |
| Diarrhea |
| Systemic or B symptoms |
| Fever |
| Night sweating |
| Unexplained weight loss |
| Gastrointestinal complications |
| Perforation |
| Obstruction |
| Hemorrhage |
| Comorbidity |
| Splenic hypofunction/atrophy |
| Mesenteric lymph node cavitation |
| Severe malnutrition |
| Laboratory findings |
| Anemia |
| Peripheral eosinophilia |
| Low albumin |
| High lactate dehydrogenase |
| Pathology findings |
| CD3 positivity/CD4 negativity |
| High mitotic index |
| Nonmonomorphic infiltrate |
| CD56 negativity |
| CD30 positivity |
| High eosinophils, histiocytes, and small lymphocytes |
| Monoclonal rearrangement of the TCR-γ chain at PCR analysis |
| Intestinal symptoms |
| Abdominal pain |
| Diarrhea |
| Systemic or B symptoms |
| Fever |
| Night sweating |
| Unexplained weight loss |
| Gastrointestinal complications |
| Perforation |
| Obstruction |
| Hemorrhage |
| Comorbidity |
| Splenic hypofunction/atrophy |
| Mesenteric lymph node cavitation |
| Severe malnutrition |
| Laboratory findings |
| Anemia |
| Peripheral eosinophilia |
| Low albumin |
| High lactate dehydrogenase |
| Pathology findings |
| CD3 positivity/CD4 negativity |
| High mitotic index |
| Nonmonomorphic infiltrate |
| CD56 negativity |
| CD30 positivity |
| High eosinophils, histiocytes, and small lymphocytes |
| Monoclonal rearrangement of the TCR-γ chain at PCR analysis |