The whole spectrum of head and neck cancer consists of
 Orbital cancers
 Oral cancers
    Cancer of lip , angle of mouth , buccal mucosa , 
    toungue , alveolus(jaw) , palate , tonsil
Ear malignancies
Nasal and sinonasal cancers
Nasopharyngeal cancers
Laryngeal/hypopharyngeal cancers
Salivary gland cancers
              Parotid gland
              Submandibular salivary gland
Thyroid and parathyroid gland cancers
Parapharyngeal space and skull base tumors
Secondary neck cancers

Other areas of his interest are voice disorders and Nasal Endoscopic surgery.