The Necessity Of Thyriod Microcarcinoma And Neck Lymphatic Clearing, And That Of The Appropriate Scope

1.Objectives:To obersve the lymphatic metastasis of 87 thyroid microcarcinoma patients after neck dissections,and discuss the necessity and circumsciption of neck dissection for the thyroid microcarcinoma patient.2.Methods:Choose from Dec 1995 to Jun 2003 in zhe jiang cancer hospital are 87 cases of the thyroid microcarcinoma,of which 5 were male and 82 case of females,at the age of 26 to 67,and the median age is 47.9.All patients were taken sonography and CT before operation,single thyriod nodule was 38,and multiple thyriod nodules was 49.LevelⅥneck dissection was 46,levelⅡ-Ⅵneck dissection was 41.All patients were followed-up by 5-13 years,the median time is 8.4years.Then we analysis the lymphatic metastasis of this cases and get the conclusion.3.Results:The prevalence of lymphatic metastasis in levelⅥneck dissection was about 24/46(52.1%);the prevalence of lymphatic metastasis in levelⅡ—Ⅵneck dissection was about 23/41(56.1%),in which the lymphatic metastasis in levelⅥwas 12/41 (29.3%),and in levelⅡ—Ⅴwas 19/41(46.3%).The total prevalence of lymphatic metastasis was 47/87(54.6%),the lymphatic metastasis was mostly seen in levelⅢ (37/87),Ⅳ(31/87) andⅡ(12/87),we did not see lymphatic metastasis in levelⅤ.4.Conclusions:(1) The prevalence of lymphatic metastasis in thyriod microcarcinoma patients was 54.6%in this cases.(2) The neck dissection of thyriod microcarcinoma is necessary,The neck dissection of levelⅡ-Ⅵis required if lymphatic metastasis diagnosis is made before operation; The neck dissection of levelⅥis required for thyriod microcarcinoma of CNO,and sometimes extend to levelⅡ—Ⅵis practicable.