Study of INBRX-109 in Conventional Chondrosarcoma (ChonDRAgon)

• Drug: INBRX-109
• Drug: Placebo

Inclusion Criteria:

1. Conventional chondrosarcoma, unresectable (=inoperable) or metastatic.
2. Measurable disease by RECISTv1.1. Note: Tumor lesions located in a previously irradiated (or other locally treated) area will be considered measurable, provided there has been clear imaging-based progression of the lesions since the time of treatment.
3. Radiologic progression of disease per RECISTv1.1 criteria within 6 months prior to screening for this study.
4. Adequate hematologic, coagulation, hepatic and renal function as defined per protocol.
5. Eastern Cooperative Oncology Group performance status (ECOG PS) of 0 or 1.
6. Estimated life expectancy of at least 12 weeks.
7. Availability of archival tissue or fresh cancer biopsyremoval of a section of tissue to analyse for cancer cells are mandatory.