Has a FIBA World Cup game ever ended 38-19?
Exactly once. On October 31, 1950, Brazil beat Egypt 38-19, and no FIBA World Cup game before or since has ended that way. When it happened it was a scorigami, the first 38-19 in league history.
That makes 38-19 the 240th most common final score out of 863 that have ever occurred in FIBA World Cup. One point away, 39-19 has happened never and 38-20 has happened never.