Epidemiology and management of neuroendocrine neoplasms of unknown primary in Switzerland
Background Neuroendocrine neoplasms (NENs) are mainly located in the gastrointestinal tract or the lungs. In up to 14% of cases, the primary tumor remains unidentified, classified as cancer of unknown primary (CUP). Due to their rarity and heterogeneity, CUPs are poorly studied. Methods This study conducts retrospectiv...