Spontaneous remission

Spontaneous remission, also called spontaneous healing or spontaneous regression, is an unexpected improvement or cure from a disease that usually progresses. These terms are commonly used for unexpected transient or final improvements in cancer.^[1] Spontaneous remissions concern cancers of the haematopoietic system (blood cancer, e.g., leukemia), while spontaneous regressions concern palpable tumors; however, both terms are often used interchangeably.