FZD10 and synovial sarcoma: Fzd10 was found ubiquitously upregulated in synovial sarcoma (SS), but scarcely detectable in normal tissues except the placenta.101 A group of radioimmunoconjugate humanized antibody OTSA-101 was designed to target Fzd10, whose derivations include 211At-OTSA-101, 111In-OTSA-101, and 90Y-OTSA-101.