The First Patient in Poland Treated for SMA with Nusinersen During Pregnancy

Background: The accessibility of effective SMA (spinal muscular atrophy) treatment is resulting in a growing number of affected women reaching fertility age and deciding to conceive. Pregnancy in women with SMA is associated with a high risk of rapid progression of symptoms, including increased weakness, growing paresis, or even onset of respiratory failure requiring ventilation support. Muscle weakness frequently leads to disability, which in a high percentage is irreversible. Pre-term labor and delivery by cesarean section are the most commonly described cases in the literature. Methods: This paper aims to describe the first case in Europe, a 21-year-old patient treated with Nusinersen under the drug program during the third trimester of pregnancy. Despite the significant progression of the disease during pregnancy, the patient did not lose gait function. The pregnancy was ended at 33Hbd, and the baby's condition was unremarkable. In addition to clinical data, this paper also discusses the economic aspects. Conclusions: Thanks to the rapid initiation of treatment, the patient did not lose her ability to walk, and a significant improvement in motor function was observed after the postpartum period. No side effects or negative effects on the fetus were observed.