Malignant neoplasm of orbit

**Inclusion terms:** - Malignant neoplasm of connective tissue of orbit - Malignant neoplasm of extraocular muscle - Malignant neoplasm of peripheral nerves of orbit - Malignant neoplasm of retrobulbar tissue - Malignant neoplasm of retro-ocular tissue

**Excludes1:** - malignant neoplasm of orbital bone (C41.0)