Characterization of focal hypermetabolic thyroid incidentaloma: An analysis with F-18 fluorodeoxyglucose positron emission tomography/computed tomography parameters

Table 1 Demographic and clinical characteristics of patients who had abnormal hypermetabolism in the thyroid (n = 339)

Characteristics	Male	Female	Total
Subjects (n)	185	154	339
Age (yr, mean ± SD)	68 ± 11.2	63 ± 15.0	66 ± 13.3
Primary malignancy (n)
Lung	64	33	97 (28.6%)
Colorectal	31	11	42 (12.4%)
Breast	0	50	50 (14.7%)
Lymphoma	15	15	30 (8.8%)
Gastrointestinal	20	8	28 (8.3%)
Hepatobiliary	20	8	28 (8.3%)
Head and neck	13	2	15 (4.4%)
Other	22	27	49 (14.5%)