Mediastinal ectopic parathyroid adenomas: diagnostics and therapeutic challenge - El Hammoumi, Massine; Kamdem, Marius; Amraoui, Mouad; Bhairis, Mohamed; Hassane Kabiri, El (Kardiochirurgia i Torakochirurgia Polska/Polish Journal of Thoracic and Cardiovascular Surgery, 2021)