Table 3.
Number and type of other primaries before and after GIST
| Cancer type | Before GIST (n) | After GIST (n) | Total, n (% of patients with additional malignancy) | |
| GU carcinoma | 50 | 12 | 62 (33) | |
| Prostate | 25 | 3 | ||
| Kidney | 7 | 5 | ||
| Uterus | 7 | |||
| Bladder | 5 | 1 | ||
| Ovary | 5 | 2 | ||
| Testis | 1 | |||
| Ureter | 1 | |||
| GI carcinoma | 39 | 9 | 48 (26) | |
| Colorectal | 13 | 5 | ||
| Esophagus | 9 | |||
| Pancreas | 5 | |||
| Appendix | 3 | 1 | ||
| Small intestine | 3 | 1 | ||
| Stomach | 3 | 2 | ||
| Liver | 2 | |||
| Gall bladder | 1 | |||
| Breast | Breast | 12 | 3 | 15 (8) |
| Hematologic | 6 | 6 | 12 (6) | |
| Leukemia | 4 | 4 | ||
| Lymphoma | 2 | 2 | ||
| Head, neck, and lung | 5 | 6 | 11 (6) | |
| Lung | 4 | 6 | ||
| Retinoblastoma | 1 | |||
| Sarcoma | 4 | 5 | 9 (5) | |
| Leiomyosarcoma | 2 | |||
| Sarcoma, unclassified | 1 | 3 | ||
| Sarcoma, epithelioid | 1 | |||
| Sarcoma, desmoid | 1 | |||
| Liposarcoma | 1 | |||
| Melanoma | Melanoma | 7 | 2 | 9 (5) |
| Thyroid | Thyroid | 3 | 3 | 6 (3) |
| Endocrine | 1 | 2 | 3 (2) | |
| Parotid salivary gland carcinoma | 1 | 1 | ||
| Adrenal | 1 | |||
| Neurological | – | 1 | 1 | |
| Cerebral hemisphere | 1 | |||
| Unknown primary carcinoma | Unknown | 7 | 3 | 10 (5) |
| Total | 134 | 52 | 186 |
GI, gastrointestinal; GIST, gastrointestinal stromal tumor; GU, genitourinary.