68-Ga-DOTATATE PET-CT Scan for Diagnosis of Primary and Metastatic Somatostatin Receptor-positive Neuroendocrine Tumors (NETs)

Not Applicable

Completed

Brief Summary: To evaluate the concordance and discordance between results of 68Ga-DOTATATE PET-CT scan and OctreoScan ® which is considered standard of care diagnostic test for neuroendocrine cancers and other imaging modalities like CT scan/MRI as gold standard.

Detailed Description: The number of lesions that could be identified clearly as single foci will be determined for each patient. The same anatomic areas will be imaged with 68Ga-DOTATATE PET and 111In-penteoctreotide Scintigraphy to ensure relevant comparison of lesion detection. Because of confluence and inability to clearly delineate single liver lesions in some cases, liver metastases will be classified as 1 organ metastasis, independent of the number of liver metastases present. Lymph nodes smaller than 1 cm on CT or MRI and showing marked avidity for 68Ga- DOTATATE and 111In-penteoctreotide will be labeled as positive for disease. The presence of lesions will be confirmed by cross-sectional imaging of all patients with CT or MRI.

Recruitment & Eligibility

Inclusion Criteria

Signed informed consent
Subjects of either sex, aged ≥18 years
Histologically and/or clinically confirmed and/or suspected NET and/or A diagnostic imaging study including but not limited to CT or MRI or FDG PET/CT, NaF PET/CT, bone scan, ultrasound, etc. of the tumor region or suspected area within the 4 weeks of dosing day
Recent Blood test results (within 2-4 weeks predose) as WBC: ≥2 x 109/L, Haemoglobin: ≥8.0 g/dL, Platelets: ≥50 x 109/L, ALT, AST, AP:≤ 5 times ULN [ ULN for ALT, AST and AP is 70, 20 and 20 Units/I respectively], Bilirubin: ≤3 times ULN [ULN for total bilirubin is 1.3mg/dL]
Serum creatinine: Serum creatinine: <170 μmol/L
egative pregnancy test in women capable of child-bearing

Exclusion Criteria

Known hypersensitivity to DOTA, to 68Gallium, to Octreotate or to any of the excipients of 68Ga-DOTATATE
Therapeutic use of any somatostatin analogue, including Sandostatin® LAR (within 28 days) and Sandostatin® (within 2 days) prior to study imaging. If a patient is on Sandostatin® LAR a wash-out phase of 28 days is required before the injection of the study drug
Pregnant or breast-feeding women
Current somatic or psychiatric disease/condition that may interfere with the objectives and assessments of the study

Arm && Interventions

Group	Intervention	Description
68Ga-DOTATATE PET scans	68Ga-DOTATATE injection and PET scan	This is an open-label, single-dose diagnostic study using DOTATATE peptide, labelled with the 68Ga tracer. The radiation (imaging) dose will be 111-185MBq (3 - 5 mCi) ±25%. Imaging will start 90 ±30 minutes after injection. The diagnostic sensitivity, specificity and accuracy of the study drug are being compared with a predefined standard of truth (SOT) parameters. A comparative conventional scan, such as anatomical imaging modalities CT, ultrasound, and MRI or functional imaging using 18F-FDG and NaF PET/CT or bone scan is being used to evaluate the diagnostic efficacy of 68Ga-DOTATATE.

Primary Outcome Measures

Name	Time	Method
Number of lesions detected by 68GA-DOTATATE compared to conventional imaging technique	SOT within 28 days before 68Ga-DOTATATE PET/CT scan	We want to determine if the 68Ga-DOTATATE PET/CT scan changes care plans compared to conventional imaging/diagnostic techniques (Octreoscan, MRI).

Secondary Outcome Measures

Name	Time	Method
Frequency and severity of Adverse Events	4 days	Adverse events will be collected from the time of 68Ga-DOTATATE injection until 48 hours post-injection visit. Adverse events will be classified using criteria for adverse events (CTCAE) Version 4.