Association between Tumor Size and Bilateral Involvement in Papillary Thyroid Carcinoma

Table 1

Distribution of bilateral cases according to primary tumor size.

Specimen groups	Definition	Number of specimens	Percentage (%)
Group 1	Tumor foci less than or equal to 1 cm in each lobe (microcarcinoma)	109	42
Group 2	Tumor foci greater than 1 cm in one lobe and less than 1 cm in the other lobe	121	46
Group 3	Tumor foci greater than 1 cm in each lobe	32	12