text: Other diagnostic studies for<unk>  cancer include Fluoro-D-glucose positron emission tomography (PET)-CT which shows increased uptake of tumor  metabolic cells. Fluoro-D-glucose positron emission tomography (PET)-CT may be performed to detect late stages of<unk>  cancer and inaccessible regions by endoscopy. Endoscopy can be useful in detecting primary tumor invasion and biopsy.
option_0: Hypopharyngeal cancer other imaging findings
option_1: Laryngeal cancer other imaging findings
option_2: Nasopharyngeal carcinoma other imaging findings
option_3: Laryngeal cancer other diagnostic studies
option_4: Oral cancer other imaging findings
option_5: Laryngeal cancer differential diagnosis
option_6: Nasopharyngeal carcinoma other diagnostic studies
option_7: Hypopharyngeal cancer differential diagnosis