| Source | Code | Name | Case count | Share of cases (%) |
|---|---|---|---|---|
| CANC | CANC_TOPO(C482)_MORPHO(8461)_BEH(3) | Peritoneum, NOS, Serous surface papillary carcinoma (C56.9) | 20 | |
| CANC | CANC_TOPO(C481)_MORPHO(8461)_BEH(3) | Specified parts of peritoneum, Serous surface papillary carcinoma (C56.9) | 14 | |
| DEATH | DEATH_ICD10(C480) | Retroperitoneum | 12 | |
| CANC | CANC_TOPO(C480)_MORPHO(8890)_BEH(3) | Retroperitoneum, Leiomyosarcoma, NOS | 10 | |
| CANC | CANC_TOPO(C480)_MORPHO(8850)_BEH(3) | Retroperitoneum, Liposarcoma, NOS | 8 | |
| DEATH | DEATH_ICD10(C488) | Overlapping lesion of retroperitoneum and peritoneum | 8 | |
| CANC | CANC_TOPO(C480)_MORPHO(9680)_BEH(3) | Retroperitoneum, Malignant lymphoma, large B-cell, diffuse, NOS | 6 | |
| DEATH | DEATH_ICD10(C481) | Specified parts of peritoneum | 6 | |
| CANC | CANC_TOPO(C480)_MORPHO(8858)_BEH(3) | Retroperitoneum, Dedifferentiated liposarcoma | 5 | |
| CANC | CANC_TOPO(C482)_MORPHO(9052)_BEH(3) | Peritoneum, NOS, Epithelioid mesothelioma, malignant | 5 | |
| DEATH | DEATH_ICD10(C482) | Peritoneum, unspecified | 5 |