| Outbound Relationships | Type | Target | Active | Characteristic | Refinability | Group | Values | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Is a | Disorder of lymphatic vessel | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Is a | Disorder of abdomen | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Is a | Disorder of pelvic region | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Is a | Langerhans cell histiocytosis, disseminated | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Is a | Letterer-Siwe disease | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Finding site | Pelvic lymph node structure | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Finding site | Dendritic cell system structure | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Course | Persistent embryonic otic artery | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Course | Worth disease | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Course | Persistent embryonic hypoglossal artery | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Course | Boomerang dysplasia | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Finding site | Leukocyte | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Pathological process | Malignant neoplastic process | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Associated morphology | Langerhans cell histiocytosis, no International Classification of Diseases for Oncology subtype | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Associated morphology | Langerhans cell histiocytosis, disseminated | false | Inferred relationship | Existential restriction modifier | 2 |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Is a | Primary malignant neoplasm of trunk | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Is a | Disorder of lymph node | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Is a | Neoplasm of lymph node | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Associated morphology | Langerhans cell histiocytosis, disseminated | false | Inferred relationship | Existential restriction modifier | 3 |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Associated morphology | Langerhans cell histiocytosis, disseminated | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Is a | Primary malignant neoplasm of pelvis | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Is a | Neoplasm of intrapelvic lymph node | true | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Associated morphology | Langerhans cell histiocytosis, disseminated | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Associated morphology | White blood cell abnormality | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Associated morphology | Langerhans cell histiocytosis, disseminated | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Finding site | Lymphoid system structure | false | Inferred relationship | Existential restriction modifier | 3 |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Associated morphology | Malignant neoplasm of primary, secondary, or uncertain origin | false | Inferred relationship | Existential restriction modifier | 3 |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Finding site | Hematopoietic system structure | false | Inferred relationship | Existential restriction modifier | 3 |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Associated morphology | Langerhans cell histiocytosis - category | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Associated morphology | Langerhans cell histiocytosis, disseminated | true | Inferred relationship | Existential restriction modifier | 1 |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Finding site | Pelvic lymph node structure | true | Inferred relationship | Existential restriction modifier | 1 |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Is a | Letterer-Siwe disease of intra-abdominal lymph nodes | true | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of intrapelvic lymph nodes | Is a | Malignant tumor of pelvis | true | Inferred relationship | Existential restriction modifier |  |  |