IntroductionPreoperative localization of parathyroid adenomas and staining of parathyroid adenomas guided by different methods improve surgical outcomes. The purpose of the present study was to evaluate the contribution of US-guided methylene blue staining to the surgical performance of parathyroid adenomas.Material and MethodThe study was conducted in the endocrinology and general surgery clinic on 152 parathyroid adenoma patients who underwent methylene blue staining with preoperative US guidance. This application is a new method and is very different from other applications since methylene blue is administered parenterally. In the procedure, a very low-dose methylene blue is administered to the inside or wall of the parathyroid adenoma with a fine needle. The data of the patients were obtained retrospectively from patient files and electronic records.ResultsIn the present study, a total of 152 patients who had suspicious parathyroid adenomas with difficult localization and a history of previous surgical failure were stained with methylene blue in the preoperative period. This practice was associated with minimally invasive surgery and very short operative time. The methylene blue staining method was also found to be effective in the diagnosis, localization, and treatment of parathyroid adenomas with 100% sensitivity and 100% specificity.ConclusionAs a result of the present study, it was concluded that methylene blue staining provides a guide for the excision of parathyroid adenomas, potentially improving surgical outcomes in the resection of unsuccessful attempts and ectopic parathyroid adenomas difficult to identify.