It is newly recognized by the World Health Organization Classification of Head and Neck Tumours .
Biphenotypic sinonasal sarcoma is a newly recognized , very rare , low grade malignant tumor of the nasal cavity which formerly was probably included in fibrosarcoma and synovial sarcoma cases .
sarcoma is newly recognized by the World Health Organization Classification of Head and Neck Tumours .
Biphenotypic sinonasal sarcoma is a newly recognized , very rare , low grade malignant tumor of the nasal cavity which formerly was probably included in fibrosarcoma and synovial sarcoma cases .