This is a prospective, single-center, single-arm phase 2 study in patients with clear cell renal cell carcinoma and metastasis or recurrence suspicion. The goal is to determine the sensitivity and specificity of 68Ga-NY104 PET/CT in patients with clear cell renal cell carcinoma and metastasis or recurrence suspicion

This is a prospective, single-center, single-arm phase 2 study in patients with clear cell renal cell carcinoma and metastasis or recurrence suspicion. Each patient will receive one dose of 68Ga-NY104. Dedicated whole-body PET/CT imaging will be performed. PET/CT studies will be interpreted by two readers, both of whom will provide independent and blinded interpretations. Imaging interpretations and a composite ground truth will be used to estimate the diagnostic efficacy of 68Ga-NY104 PET/CT.

A total of 40 patients will be recruited at Peking Union Medical College Hospital.

Inclusion Criteria:

1. Age ≥ 18 y
2. Histopathological diagnosis of clear cell renal cell carcinoma
3. Suspected of metastasis or recurrence from ccRCC based on previous conventional imaging or 18F-FDG PET/CT scan.
4. Expected survival of at least 6 months
5. ECOG ≤ 2
6. Written informed consent provided for participation in the trial
7. In the opinion of investigator, willing and able to comply with required study procedures.

Exclusion Criteria:

1. On VEGF TKI treatment less than 1 week before 68Ga-NY104 PET/CT. TKI is known to affect girentuximab binding in patients with ccRCC and is expected to have the same effect on 68Ga-NY104. If patients were on VEGF TKI treatment, such as sunitinib, sorafenib, cabozantinib, pazopanib, or lenvatinib, a washout of one week before 68Ga-NY104 PET/CT is required.
2. Patients on HIF antagonist treatment < 3 months before 68Ga-NY104 PET/CT. CA9, which encodes carbonic anhydrase IX (CAIX), is one of the genes most strongly upregulated by HIF-1. HIF antagonist, such as Belzutifan, might affect the expression of CAIX and thus the binding of 68Ga-NY104 to tumor. Withdraw of at least 3 months is required for HIF antagonist.
3. Pregnancy or breastfeeding.
4. Severe claustrophobia.

Available upon request

Within 2 years after the publication of the main results

No limit.