A. Cheva, S. Tsagkaropoulos, P. Pepis, A. Syrnioti, and C. Foroulis, “Uncommon first diagnosis of metastatic papillary thyroid carcinoma with ‘signet-ring’ cells morphology through pericardial effusion”, Arch Case Rep, vol. 6, no. 1, pp. 005–008, Jan. 2022.