Has a FIBA World Cup game ever ended 52-48?
Exactly once. On November 4, 1954, Chile beat Peru 52-48, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 52-48 in league history.
That makes 52-48 the 240th most common final score out of 863 that have ever occurred in FIBA World Cup. One point away, 53-48 has happened never and 52-49 has happened never.