The final and the qualifying heats of the men's 4×100 metre medley relay event at the 1998 World Aquatics Championships were held on Sunday 18 January 1998 in Perth, Western Australia.
The final and the qualifying heats of the men's 4×100 metre medley relay event at the 1998 World Aquatics Championships were held on Sunday 18 January 1998 in Perth, Western Australia. (en)