| Outbound Relationships | Type | Target | Active | Characteristic | Refinability | Group | Values | 
| Malignant neoplasm of pelvic bones, sacrum and coccyx | Is a | Malignant tumor of bone and articular cartilage | false | Inferred relationship | Existential restriction modifier |  |  | 
| Malignant neoplasm of pelvic bones, sacrum and coccyx | Is a | Neoplasm of pelvic bone | false | Inferred relationship | Existential restriction modifier |  |  | 
| Malignant neoplasm of pelvic bones, sacrum and coccyx | Is a | Neoplasm of trunk | false | Inferred relationship | Existential restriction modifier |  |  | 
| Malignant neoplasm of pelvic bones, sacrum and coccyx | Is a | Neoplasm of pelvis | false | Inferred relationship | Existential restriction modifier |  |  | 
| Malignant neoplasm of pelvic bones, sacrum and coccyx | Pathological process | Malignant neoplastic process | false | Inferred relationship | Existential restriction modifier |  |  | 
| Malignant neoplasm of pelvic bones, sacrum and coccyx | Pathological process | Neoplastic process | false | Inferred relationship | Existential restriction modifier |  |  | 
| Malignant neoplasm of pelvic bones, sacrum and coccyx | Associated morphology | Neoplasm | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Malignant neoplasm of pelvic bones, sacrum and coccyx | Finding site | Anatomical structure | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Malignant neoplasm of pelvic bones, sacrum and coccyx | Finding site | Structure of innominate bone and/or sacrum and/or coccyx | true | Inferred relationship | Existential restriction modifier | 1 |  | 
| Malignant neoplasm of pelvic bones, sacrum and coccyx | Is a | Neoplasm of sacrum | false | Inferred relationship | Existential restriction modifier |  |  | 
| Malignant neoplasm of pelvic bones, sacrum and coccyx | Is a | Malignant tumor of pelvis | true | Inferred relationship | Existential restriction modifier |  |  | 
| Malignant neoplasm of pelvic bones, sacrum and coccyx | Associated morphology | Malignant neoplasm of primary, secondary, or uncertain origin | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Malignant neoplasm of pelvic bones, sacrum and coccyx | Finding site | Bone structure of sacrum | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Malignant neoplasm of pelvic bones, sacrum and coccyx | Is a | Malignant neoplasm of bone | true | Inferred relationship | Existential restriction modifier |  |  | 
| Malignant neoplasm of pelvic bones, sacrum and coccyx | Associated morphology | Malignant neoplasm of primary, secondary, or uncertain origin | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Malignant neoplasm of pelvic bones, sacrum and coccyx | Finding site | Bone structure of sacrum | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Malignant neoplasm of pelvic bones, sacrum and coccyx | Is a | Neoplasm of pelvic bone | true | Inferred relationship | Existential restriction modifier |  |  | 
| Malignant neoplasm of pelvic bones, sacrum and coccyx | Associated morphology | Malignant neoplasm of primary, secondary, or uncertain origin | false | Inferred relationship | Existential restriction modifier | 2 |  | 
| Malignant neoplasm of pelvic bones, sacrum and coccyx | Finding site | Structure of innominate bone and/or sacrum and/or coccyx | false | Inferred relationship | Existential restriction modifier | 2 |  | 
| Malignant neoplasm of pelvic bones, sacrum and coccyx | Is a | Malignant tumor of lower limb | false | Inferred relationship | Existential restriction modifier |  |  | 
| Malignant neoplasm of pelvic bones, sacrum and coccyx | Associated morphology | Malignant neoplasm | true | Inferred relationship | Existential restriction modifier | 1 |  | 
| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Primary malignant neoplasm of ilium | Is a | False | Malignant neoplasm of pelvic bones, sacrum and coccyx | Inferred relationship | Existential restriction modifier |  | 
| Primary malignant neoplasm of ischium | Is a | False | Malignant neoplasm of pelvic bones, sacrum and coccyx | Inferred relationship | Existential restriction modifier |  | 
| Primary malignant neoplasm of pubis | Is a | False | Malignant neoplasm of pelvic bones, sacrum and coccyx | Inferred relationship | Existential restriction modifier |  | 
| Malignant neoplasm of sacral vertebra | Is a | True | Malignant neoplasm of pelvic bones, sacrum and coccyx | Inferred relationship | Existential restriction modifier |  | 
| Malignant neoplasm of coccygeal vertebra | Is a | True | Malignant neoplasm of pelvic bones, sacrum and coccyx | Inferred relationship | Existential restriction modifier |  | 
| Ca pelvic bones/sacrum/coccyx | Is a | False | Malignant neoplasm of pelvic bones, sacrum and coccyx | Inferred relationship | Existential restriction modifier |  | 
| Malignant neoplasm of pelvis, sacrum or coccyx NOS | Is a | False | Malignant neoplasm of pelvic bones, sacrum and coccyx | Inferred relationship | Existential restriction modifier |  | 
| Primary malignant neoplasm of pelvic bones, sacrum and coccyx | Is a | True | Malignant neoplasm of pelvic bones, sacrum and coccyx | Inferred relationship | Existential restriction modifier |  | 
| Malignant sacral teratoma | Is a | False | Malignant neoplasm of pelvic bones, sacrum and coccyx | Inferred relationship | Existential restriction modifier |  | 
| Primary malignant neoplasm of pelvic bone | Is a | False | Malignant neoplasm of pelvic bones, sacrum and coccyx | Inferred relationship | Existential restriction modifier |  | 
| Sarcoma of bone of pelvis | Is a | True | Malignant neoplasm of pelvic bones, sacrum and coccyx | Inferred relationship | Existential restriction modifier |  | 
| Metastatic malignant neoplasm to pelvic bone | Is a | True | Malignant neoplasm of pelvic bones, sacrum and coccyx | Inferred relationship | Existential restriction modifier |  | 
| Carcinoma of pelvic bones, sacrum and coccyx | Is a | True | Malignant neoplasm of pelvic bones, sacrum and coccyx | Inferred relationship | Existential restriction modifier |  | 
| Malignant neoplasm of pelvis, sacrum or coccyx NOS | Is a | False | Malignant neoplasm of pelvic bones, sacrum and coccyx | Inferred relationship | Existential restriction modifier |  |