The extrathyroid distribution is observed in 4–16 % cases of highly differentiated thyroid cancer; it is marked by a great resistance to the treatment and worst prognoses. The resection of trachea is considered to be the method of choice under the condition of intraluminal trachea invasion. The socalled «shaving excision» is widely used for the treatment of extraluminary invasion. To decrease the risk of local recurrent of tumour growing after the procedure of «shaving excision» the authors of the article have proposed to use the additional cryodistruction towards the area of trachea invasion as an efficient and safe method of devitalization of microfoci of tumour in trachea wall.

It was analyzed and identified clinico-pathomorphological features of papillary thyroid microcarcinoma (PTMC) concurrent with chronic lymphocytic thyroiditis (CLT). We found PTMC associated with CLT to have smaller size of carcinoma, significantly lower invasion to lymphatic vessels and capsule of thyroid gland as well as lower rate of metastases to local lymphonodules. Our results lead to conclusion that PTMC associated with CLT has lower level of biological aggressiveness. From these data we also hypothesize that CLT with may serve as a positive prognostic factor for patients with PTMC.

The aim of the study was to analyze and estimate clinical and pathological features of papillary thyroid microcarcinoma concurrent with follicular thyroid adenoma. Our findings suggest PTMC accompanied by follicular thyroid adenoma to have a less aggressive biological behavior compared to pure PTMC that might be considered in routine clinical practice. Moreover, PTMC associated with follicular thyroid adenoma may have prognostic importance for closer and long-time follow up of patients.

Results of the study revealed the oncological process to show less favorable clinicopathologicalfeatures in patients with thyroid cancer (TC) only as compared to TC comorbid by bening thyroidneoplasms. It determines that TC accompanied by other thyroid lesions exhibited better prognosticfeatures such as low proportion of male patients, smaller size of primary tumor due to elevated numberof cases with thyroid microcarcinoma, low proportion of biologically aggressive medullary TC. Theage over 45 years was found to be only one unfavorable factor for patients with TC comorbid beningthyroid lesions.