| Outbound Relationships | Type | Target | Active | Characteristic | Refinability | Group | Values | 
| Letterer-Siwe disease of lymph nodes of head, face and neck | Is a | Disorder of lymphoid system | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of lymph nodes of head, face and neck | Is a | Letterer-Siwe disease | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of lymph nodes of head, face and neck | Finding site | Leukocyte | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of lymph nodes of head, face and neck | Finding site | Structure of lymph node of head and neck | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of lymph nodes of head, face and neck | Finding site | Hematopoietic system structure | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of lymph nodes of head, face and neck | Pathological process | Malignant neoplastic process | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of lymph nodes of head, face and neck | Is a | Disorder of lymph node | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of lymph nodes of head, face and neck | Associated morphology | Langerhans cell histiocytosis, no International Classification of Diseases for Oncology subtype | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of lymph nodes of head, face and neck | Finding site | Dendritic cell system structure | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of lymph nodes of head, face and neck | Is a | Finding of head and neck region | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of lymph nodes of head, face and neck | Associated morphology | White blood cell abnormality | false | Inferred relationship | Existential restriction modifier |  |  | 
| Letterer-Siwe disease of lymph nodes of head, face and neck | Finding site | Hematopoietic system structure | false | Inferred relationship | Existential restriction modifier |  |  |