Histiocytomas usually occur as solitary lesions which undergo spontaneous regression.

A German clinical trial observed a group of these patients and some infants did not require further intervention, in part due to spontaneous regression.

At least for small tumors the frequency of spontaneous regression most likely was drastically underrated.

In a carefully designed study on mammography it was found that 22% of all breast cancer cases underwent spontaneous regression.

A great number of spontaneous regressions from cancer occurred after a feverish infection.

However, the natural history of desmoids is variable, with both spontaneous regression and variable growth rates.

To everyone's surprise, it turned out that the supposedly rare spontaneous regressions were actually the most common form of neuroblastoma tumors.

Desmoid tumors have a highly variable natural history, including well documented examples of spontaneous regression.

But that didn't make sense: Laura had never heard of spontaneous hypnotic regression.

A spontaneous regression is a process by which memories lost through dissociation can be retrieved.