passages.id: split_6_test_1039_passage
passages.type: progene_text
passages.text: Group 1 ( 11 patients ) had received no previous surgery ; group 2 ( 13 ) underwent thyroidectomy before referral and had an elevated calcitonin level without radiologic evidence of local regional or distant metastases ; and group 3 ( 16 ) underwent thyroidectomy before referral and had an elevated calcitonin level with radiologic evidence of local - regional recurrence .