EAP 177Lu-DOTA0-Tyr3-Octreotate for Inoperable, SSR+, NETs, Progressive Under SSA Tx

Inclusion Criteria: * Presence of metastasized or locally advanced neuroendocrine tumor, inoperable (curative intent) at enrollment time, and regardless of the origin of the tumor. * Ki67 index ≤ 20% * Patients progressive under SSA (any dose) at the time of enrollment * Target lesions over-expressing somatostatin receptors according to an appropriate imaging method (e.g. 111In-pentetreotide (Octreoscan) imaging or 68Ga-DOTA0-Tyr3-Octreotate (or 68Ga-edotreotide) imaging) Exclusion Criteria: * Either serum creatinine \>150 μmol/L (\>1.7 mg/dL), or creatinine clearance \<50 mL/min calculated by the Cockroft Gault method, eventually confirmed by measured creatinine clearance (or measured glomerular filtration rate (GFR) using plasma clearance methods, not gamma camera-based) \<50 mL/min (the measured creatinine clearance / GFR is required only as confirmatory exam). * Hb concentration \<5.0 mmol/L (\<8.0 g/dL); WBC \<2x109/L (2000/mm3); platelets \<75x109/L (75x103/mm3). * Total bilirubin \>3 x ULN. * Serum albumin \<3.0 g/dL unless prothrombin time is within the normal range. * Pregnancy or lactation. * For female patients of childbearing potential (defined as \< 2 years after last menstruation and not surgically sterile) and male patients, who are not surgically sterile or with female partners of childbearing potential: absence of effective, non-hormonal means of contraception (intrauterine contraceptive device, barrier method of contraception in conjunction with spermicidal gel). * Any surgery, radioembolization, chemoembolization, chemotherapy and radiofrequency ablation within 12 weeks prior to enrollment. * Interferons, Everolimus (mTOR-inhibitors) or other systemic therapies within 4 weeks prior to enrollment. * Known brain metastases, unless these metastases have been treated and stabilized. * Uncontrolled congestive heart failure (NYHA II, III, IV). * Uncontrolled diabetes mellitus as defined by a fasting blood glucose \>2 ULN. * Any patient receiving treatment with short-acting Octreotide, which cannot be interrupted for 24 h before and 24 h after the administration of 177Lu-DOTA0-Tyr3-Octreotate, or any patient receiving treatment with Octreotide LAR, which cannot be interrupted for at least 4 weeks before the administration of 177Lu-DOTA0-Tyr3-Octreotate, unless the tumor uptake on target lesions is at least as high as normal liver uptake. * Patients with any other significant medical, psychiatric, or surgical condition, currently uncontrolled by treatment, which may pose a risk to the patient safety * Prior external beam radiation therapy to more than 25% of the bone marrow. * Current spontaneous urinary incontinence making impossible the safe administration of the radioactive IMP. * Other known co-existing malignancies except non-melanoma skin cancer and carcinoma in situ of the uterine cervix, unless definitively treated and with no evidence of recurrence. * Patients who have not provided a signed informed consent form to accept this treatment.