This clinical trial is evaluating a drug called HMBD-001 (an anti-HER3 monoclonal antibody)
in patients with advanced HER3 positive solid tumours. The main aims are to find out the
maximum dose of HMBD-001 that can be given safely to patients alone and in combination with
other anti-cancer agents, more about the potential side effects of HMBD-001 and how these can
be treated and what happens to HMBD-001 inside the body and how it affects cancer cells.