Anthony Yang, MD, MS, Chair, and Carmen Solorzano, MD, Vice-Chair of the SSO Endocrine Disease Site Work Group, moderate as Linwah Yip, MD, from the Endocrine DSWG presents the following practice-changing studies in endocrine surgical oncology from 2019. Executive Summary of the American Association of Endocrine Surgeons Guidelines for the Definitive Surgical Management of Thyroid Disease in Adults. Patel KN, Yip L, Lubitz CC, Grubbs EG, Miller BS, Shen W, Angelos P, Chen H, Doherty GM, Fahey TJ 3rd, Kebebew E, Livolsi VA, Perrier ND, Sipos JA, Sosa JA, Steward D, Tufano RP, McHenry CR, Carty SE.  Ann Surg. 2020 Mar;271(3):399-410. PMID: 32079828 Thyroid Lobectomy for T1b-T2 Papillary Thyroid Cancer with High-Risk Features. Suman P, Razdan SN, Wang CE, Tulchinsky M, Ahmed L, Prinz RA, Winchester DJ. J Am Coll Surg. 2020 Jan;230(1):136-144. PMID: 31672668 Five-Year Results of Radiofrequency and Laser Ablation of Benign Thyroid Nodules: A Multicenter Study from the Italian Minimally Invasive Treatments of the Thyroid Group. Bernardi S, Giudici F, Cesareo R, Antonelli G, Cavallaro M, Deandrea M, Giusti M, Mormile A, Negro R, Palermo A, Papini E, Pasqualini V, Raggiunti B, Rossi D, Sconfienza LM, Solbiati L, Spiezia S, Tina D, Vera L, Stacul F, Mauri G. Thyroid. 2020 Jul 24. PMID: 32578498 Clinical Presentation, Treatment, and Outcome of Parathyroid Carcinoma: Results of the NEKAR Retrospective International Multicenter Study. Lenschow C, Schrägle S, Kircher S, Lorenz K, Machens A, Dralle H, Riss P, Scheuba C, Pfestroff A, Spitzweg C, Zielke A, Nießen A, Dotzenrath C, Riemann B, Quinkler M, Vorländer C, Zahn A, Raue F, Chiapponi C, Iwen KA, Steinmüller T, Kroiss M, Schlegel N; NEKAR study group. Ann Surg. 2020 Jul 7. PMID: 32649472 Value of Molecular Classification for Prognostic Assessment of Adrenocortical Carcinoma. Assié G, Jouinot A, Fassnacht M, Libé R, Garinet S, Jacob L, Hamzaoui N, Neou M, Sakat J, de La Villéon B, Perlemoine K, Ragazzon B, Sibony M, Tissier F, Gaujoux S, Dousset B, Sbiera S, Ronchi CL, Kroiss M, Korpershoek E, De Krijger R, Waldmann J, Quinkler M, Haissaguerre M, Tabarin A, Chabre O, Luconi M, Mannelli M, Groussin L, Bertagna X, Baudin E, Amar L, Coste J, Beuschlein F, Bertherat J.JAMA Oncol. 2019 Jul 11;5(10). PMID: 31294750