Stroke-like migraine attacks after radiation therapy (SMART) syndrome-a case series and review

Neurol Sci. 2020 Nov;41(11):3123-3134. doi: 10.1007/s10072-020-04586-0. Epub 2022 Jul 13.

Abstract

Introduction: Cranial irradiation is used both prophylactically and for the treatment of brain tumors. There are various complications associated with it. The rare complication of stroke-like migraine attacks after radiation therapy (SMART) syndrome usually occurs several years after radiation therapy but is a reversible phenomenon. It usually presents with headaches, seizures, or other focal neurological deficits concerning stroke or recurrence of the underlying disease.

Objectives: We aim to present two cases of SMART syndrome highlighting the typical presentation, imaging findings, and differential diagnosis. We also conducted the literature review since the early recognition of this rare delayed onset complication is crucial, given its self-limited course and to avoid misinterpretations of the cases.

Conclusion: Our extensive review favors MRI, CT, and prolonged EEG monitoring to rule out other differentials and showed that initiation of corticosteroid therapy and antiepileptic treatment were helpful in the resolution of symptoms and prevent recurrences. Therefore, future studies should be focused on early identification and management guidelines for SMART syndrome.

Keywords: Headache; Migraine; Radiation therapy; SMART syndrome; Seizure; Stroke.

Publication types

  • Review

MeSH terms

  • Brain Neoplasms* / diagnostic imaging
  • Brain Neoplasms* / radiotherapy
  • Humans
  • Migraine Disorders* / diagnostic imaging
  • Migraine Disorders* / etiology
  • Neoplasm Recurrence, Local
  • Radiation Injuries* / diagnostic imaging
  • Radiation Injuries* / etiology
  • Stroke* / diagnostic imaging
  • Stroke* / etiology