PFS and OS of Patients With Advanced Neuroendocrine Cancer (NEN) After Systemic Treatment

This is a retrospective study. The analysis includes patients with advanced neuroendocrine cancer (NEN) treated with systemic therapy, because of inoperable primary tumor or/and metastasis, clinical, imaging, biochemical disease progression and no standard method of treatment hormone overproduction symptoms. The data of patients with advanced NEN with histopathological confirmation is collected from medical records. The progression-free survival (PFS), overall survival (OS) and influence of various factors on survival will be estimated. The research will be conducted for above 3 years on planned group 1500 patients. The aim of the study is to estimate median OS and PFS in advanced NEN patients treated with different schedule of systemic treatment.