| Inbound Relationships | 
Type | 
Active | 
Source | 
Characteristic | 
Refinability | 
Group | 
| Malignant tumor of parapharyngeal space | 
Is a | 
True | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant tumor of ear, nose and throat | 
Is a | 
True | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Primary malignant neoplasm of false vocal cord | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Primary malignant neoplasm of head | 
Is a | 
True | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Primary malignant neoplasm of neck | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Primary malignant neoplasm of postcricoid region | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Primary malignant neoplasm of thyroid gland | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to laryngeal aspect of aryepiglottic fold | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to postcricoid region | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to vocal cord | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant neoplasm of head NOS | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant neoplasm of jaw NOS | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant neoplasm of supraclavicular fossa NOS | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant tumor of lower labial sulcus | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant tumor of lacrimal gland | 
Is a | 
True | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Melanoma in situ of face | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Overlapping malignant neoplasm of nasopharynx | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Primary malignant neoplasm of peripheral nerves of head | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Primary malignant neoplasm of peripheral nerves of face | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Primary malignant neoplasm of peripheral nerves of neck | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Bowen's disease of eyelid | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastasis to nervous system and eye | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Primary cerebral lymphoma | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Squamous cell carcinoma of skin of cheek | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant tumor of soft tissue of head, face and neck | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastasis to head and neck lymph node | 
Is a | 
True | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| 11p partial monosomy syndrome | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Lethal midline granuloma | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Primary malignant neoplasm of anterior wall of nasopharynx | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Primary malignant neoplasm of blood vessel of face | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Primary malignant neoplasm of blood vessel of head | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Primary malignant neoplasm of blood vessel of neck | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Primary malignant neoplasm of cranial nerve | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Primary malignant neoplasm of jaw | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Primary malignant neoplasm of muscle of head | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Primary malignant neoplasm of upper respiratory tract | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to accessory sinus | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to adenoid | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to blood vessel of face | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to blood vessel of head | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to blood vessel of neck | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to bone of face | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to bone of skull | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to cervical vertebral column | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to cranial nerve | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to infraclavicular lymph nodes | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to lymph nodes of face | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to mastoid air cells | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to mouth | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to muscle of head | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to muscle of neck | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to occipital lymph nodes | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to tonsil | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to parathyroid gland | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to soft tissues of face | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to soft tissues of head | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to sphenoid bone | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to submandibular lymph nodes | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to submental lymph nodes | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to upper respiratory tract | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Reticulosarcoma of lymph nodes of head, face, and neck | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant tumor of middle ear | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant tumor of anterior two-thirds of tongue | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant tumor of base of tongue | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant tumor of major salivary gland | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant tumor of retromolar area | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant tumor of mastoid air cells | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant tumor of soft tissue of head | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant tumor of eye | 
Is a | 
True | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant tumor of orbit | 
Is a | 
True | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant tumor of minor salivary gland | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant tumor of neck | 
Is a | 
True | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant tumor of optic nerve | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant tumor of face | 
Is a | 
True | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant tumor of oral cavity | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant neoplasm of pharynx | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant neoplasm of connective and soft tissue of head, face and neck | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant melanoma of chin | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant neoplasm of nasolacrimal duct | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant tumor of cranial nerve | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant neoplasm of pituitary gland and craniopharyngeal duct | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to skin of head | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Metastatic malignant neoplasm to brain and spinal cord | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Reticulosarcoma of lymph nodes of head, face and neck | 
Is a | 
True | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Burkitt's lymphoma of lymph nodes of head, face and neck | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Hodgkin's granuloma of lymph nodes of head, face and neck | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Hodgkin's sarcoma of lymph nodes of head, face and neck | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Hodgkin's disease, lymphocytic-histiocytic predominance of lymph nodes of head, face and neck | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Hodgkin's disease, nodular sclerosis of lymph nodes of head, face and neck | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Hodgkin's disease, mixed cellularity of lymph nodes of head, face and neck | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Hodgkin's disease, lymphocytic depletion of lymph nodes of head, face and neck | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Nodular lymphoma of lymph nodes of head, face and neck | 
Is a | 
True | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Mycosis fungoides of the lymph nodes of head, face and neck | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Sézary's disease of lymph nodes of head, face and neck | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Melanoma in situ of skin structure of scalp and/or neck | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant tumor of posterior margin of nasal septum and choanae | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant tumor of optic nerve and sheath | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Cerebral tumor - malignant | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant neoplasm of skin of ear and external auricular canal NOS | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant neoplasm of border of tongue | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  | 
| Malignant neoplasm of skin head and neck | 
Is a | 
False | 
Malignant tumor of head and/or neck | 
Inferred relationship | 
Existential restriction modifier | 
  |