Purpose

The goal of this clinical trial is to study the effect of sacituzumab govitecan-hziy in adult patients with advanced thymoma and thymic carcinoma after progressing on at least one prior line of therapy. The main question it aims to answer is: • What is the overall response rate (ORR) in patients with advanced thymoma and thymic carcinoma? Participants will: * receive a fixed dose of 10 mg/kg given intravenously, once weekly on Days 1 and 8 of continuous 21-day treatment cycles until disease progression or unacceptable toxicity * have regular blood tests, scans, and examinations to monitor their health. * have blood and a biopsy of their tumor for research purposes.