Table 7.

Analysis of surgically treated cystic nodules.

	Histological diagnosis
	Group 1 (age 3–20)				Group 2 (age 21–90)
	n	Not tumor	Adenoma	Carcinoma	n	Not tumor	Adenoma	Carcinoma
All nodules	78	17	51	10	143	77	46	20
Cystic nodules	36	10	24	2	57	29	23	5
Spongiform type cyst	10	5 (2∗)	5 (2∗)	0	12	8 (1∗)	4	0
Central type cyst	19	3 (1∗)	16 (7∗)	0	25	9 (2∗)	16 (2∗)	0
Peripheral type cyst	7	2 (1∗)	3 (1∗)	2	20	12 (2∗)	3	5 (1∗)

^∗The number of nondiagnostic cytologies.