Prof. Soo has been recognised as the pioneer and leading cancer surgeon in the country. He introduced complex surgery like peritonectomies for previously inoperable cancers in the abdominal cavity and major intraabdominal tumours including removal of invaded major blood vessels. In the field of head and neck surgery, he is recognised to have performed the most of complex operations for cancers in this region. He is also recognised for removal of limb soft tissue tumours . He also introduced isolated limb perfusion for the management of intransit metastases for skin tumours attempting to salvage limbs which would otherwise require amputations.