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WHO histological classification of tumors of the hypopharynx, larynx, and trachea

Malignant epithelial tumors

Squamous cell carcinoma - ICD-O 8070/3

Verrucous carcinoma - ICD-O 8051/3
Basaloid squamous cell carcinoma - ICD-O 8083/3
Papillary squamous cell carcinoma - ICD-O 8052/3
Spindle cell carcinoma - ICD-O 8074/3
Acantholytic squamous cell carcinoma - ICD-O 8075/3
Adenosquamous carcinoma - ICD-O 8560/3

Lymphoepithelial carcinoma - ICD-O 8082/3
Giant cell carcinoma - ICD-O 8031/3
Malignant salivary gland-type tumors

Mucoepidermoid carcinoma - ICD-O 8430/3
Adenoid cystic carcinoma - ICD-O 8200/3

Neuroendocrine tumors

Typical carcinoid - ICD-O 8240/3
Atypical carcinoid - ICD-O 8249/3
Small cell carcinoma, neuroendocrine type - ICD-O 8041/3
Combined small cell carcinoma, neuroendocrine type - ICD-O 8045/3

Benign epithelial tumors

Papilloma - ICD-O 8050/0
Papillomatosis - ICD-O 8060/0
Salivary gland-type adenomas

Pleomorphic adenoma - ICD-O 8940/0
Oncocytic papillary cystadenoma - ICD-O 8290/0

Soft tissue tumors

Malignant tumors

Fibrosarcoma - ICD-O 8810/3
Malignant fibrous histiocytoma - ICD-O 8830/3
Liposarcoma - ICD-O 8850/3
Leiomyosarcoma - ICD-O 8890/3
Rhabdomyosarcoma - ICD-O 8900/3
Angiosarcoma - ICD-O 9120/3
Kaposi sarcoma - ICD-O 9140/3
Malignant peripheral nerve sheath tumor - ICD-O 9540/3
Synovial sarcoma - ICD-O 9040/3

Borderline tumors / LMP

Inflammatory myofibroblastic tumor - ICD-O 8825/1

Benign tumors

Schwannoma - ICD-O 9560/0
Neurofibroma - ICD-O 9540/0
Lipoma - ICD-O 8850/0
Leiomyoma - ICD-O 8890/0
Rhabdomyoma - ICD-O 8900/0
Hemangioma - ICD-O 9120/0
Lymphangioma - ICD-O 9170/0
Granular cell tumor - ICD-O 9580/0

Hematolymphoid tumors

Plasmacytoma - ICD-O 9734/3

Tumors of bone and cartilage

Chondrosarcoma - ICD-O 9220/3
Osteosarcoma - ICD-O 9180/3
Chondroma - ICD-O 9220/0
Giant cell tumor - ICD-O 9250/1

Mucosal malignant melanoma - ICD-O 8720/3

Secondary tumors