Endocrine Abstracts

Introduction, material and methods: Differentiated thyroid cancer is a pretty common reason for consulting in our specialty. In general terms, the prognosis is good in the main histological type but there are many others that can worsen the prognosis. It can determine the kind of surgery from hemithyroidectomy (e.g. microcarcinoma) to no intervention because of its extension at the moment of diagnosis. We have collected the data of our patients with differentiated thyroid cancer during the period from 2000 to 2015 and we have described the epidemiological, pathological and surgical aspects of them and compared with the rest of the main series published. Statistical analysis was made with Stata.

Results: A total amount of 87 valid cases of thyroid cancer were diagnosed during the period from 2000 to 2015. The average age was 46.16 (95% CI, 42.76–49.55). From these cases, 72 were female (83.0%) and 15 were male (17.24%). Diagnosis with FNA before surgery showed: 30 (34.88%) were Bethesda 2, 29 (33.72%) were Bethesda 5, 13(15.12%) were Bethesda 3 or 4, 6 (6.98%) were Bethesda 1 and in 8 (9.3%), FNA was not made. About surgery, they underwent to: 65 (74.71%) total thyroidectomy, 1 (1.15%) near-total thyroidectomy, 3 (3.45%) hemithyroidectomy, 17(19.54%) total thyroidectomy in two periods and 1 (1.15%) did not have thyroid surgery; 47(54.02%) were underwent lymphadenectomy and 40(45.98%) were not. About histological type, 80 (91.55%) were papillary thyroid cancer and 8 (8.05%) were follicular thyroid cancer. About histological subtype: 28 (36.44%) were classical forms, 14 (18.42%) were microcarcinoma subtype, 25 (32.89%) were follicular subtype, 3 (3.95%) were encapsulated subtype, 2 (2.63%) were tall cell variant, 1 (1.32%) was diffuse sclerosing variant, 1 (1.32%) was Hürthle papillary carcinoma, 1 (1.32%) was minimally invasive follicular carcinoma and 1 (1.32%) was invasive follicular carcinoma.

Conclusions: We can confirm that thyroid cancer is presented predominantly in women at a young age. Also, we can appreciate the low sensitivity of the FNA in our centre. Total thyroidectomy (in 1 or 2 periods) is the most usual technique for the thyroid surgery, leaving hemithyroidectomy for micropapillary thyroid cancer and conservative treatment for unresectable cases. The most frequent histological type is papillary thyroid cancer and within this, the classical form. Based on our data, we can say that our results are similar to the main series published (except in some fields as the FNA results).