We report data from two phase 2 clinical trials investigating the activity of tipifarnib in HRAS mutant (HRASm) solid tumors...In addition, 13 pts with recurrent/metastatic salivary gland tumors (SGT) were treated in KO-TIP-001 or in extended access programs. One objective response was observed in 12 (8%) evaluable pts and an additional 7 (58%) had stable disease as best response. Median PFS in SGT pts was 7 months.