Eur Arch Otorhinolaryngol. 2013 Feb;270(2):401-3
FIRST PARAGRAPH: The classification of neoplasms is an important matter, with correlation of a tumor’s type with its biological behavior. To provide internationally acceptable criteria for the histological diagnosis of tumors, the World Health Organization (WHO) published an updated Pathology and Genetics of Head and Neck Tumours Classification of Tumours in 2005, which included tumors of the hypopharynx, larynx and trachea.
PubMed ID: 23315201
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