Metastasis: Small Intestine Lesion
Cancers are sorted by a combination of rarity, overall frequency of metastases, and predilection for this site. Group metastases by characteristic.
| Cancer | Frequency | Comments |
| Gastrointestinal Stromal Tumor | (Primary Tumor) |  most common sites are stomach and small intestine (about equally)
often endophytic and/or exophytic components |
| Melanoma | Common | |
| Gastrointestinal Carcinoid | (Primary Tumor) | The small intestine is the most common site for GI carcinoids. The appendix used to be the most common site but is a rare site in the most recent series. The second most common site is rectum, followed by colon and stomach.
The primary tumor can be single or multiple in the small intestine. It is often overshadowed by mesenteric lymphadenopathy in size (and occasionally is not found at all). It often projects into the lumen and can cause intussusception. |
| Colorectal Adenocarcinoma | Very Rare | |
| Renal Cell Carcinoma | Very Rare | |
| Cervical Cancer | Rare | |
| Endometrial Cancer | Rare | |
| Testicular Cancer | Very Rare |  |
| Transitional Cell Carcinoma of the Bladder | Uncommon | |
| Non-Hodgkin's Lymphoma | Rare | typically not obstructed |
| Adrenal Cortical Carcinoma | Very Rare | |
| Gallbladder Cancer | Very Rare | can locally invade duodenum |
| Hodgkin's Lymphoma | Rare | |