A Rare Phantom Tentorial Lesion.

Spontaneous regression is a rare phenomenon. Here, we report a case of a 28-year-old woman with a tentorial space-occupying lesion, which entirely disappeared 40 days after the onset of her symptoms. The patient did not have any relapse during 1-year follow-up. To our knowledge, the mechanism of this phenomenon is still unclear, and this case may provide a valuable addition to the current literature.