When Hormonal Therapy Has Not Controlled Cryptogenic Infantile Spasms
This protocol applies to infants with cryptogenic infantile spasms — those who had entirely normal neurodevelopment before spasm onset, have no identifiable underlying etiology, and have no tuberous sclerosis — in whom a second course of first-line hormonal therapy has not achieved spasm control.
Clinical scenario
Cryptogenic infantile spasms are defined by normal development prior to the onset of spasms and the absence of a clear etiology. Patients without an identified etiology represent a distinct subgroup in whom the treatment trajectory differs from symptomatic cases; no tuberous sclerosis is present.
Previous treatment — failure condition
A switch to an alternative first-line hormonal medication (ACTH or prednisolone) was trialed. This line is considered to have failed when it did not achieve complete cessation of spasms and resolution of hypsarrhythmia on video EEG, typically assessed within 14 days. This protocol describes the next step taken after that failure.
Next-line approach (partial overview)
When two courses of hormonal therapy have not achieved spasm freedom, the protocol outlines further options — including a structured dietary approach and additional anti-epileptic strategies — with the specific agents, criteria, and sequencing detailed in the full regimen.
Complete regimen — including selection criteria, agents, and monitoring — available via the link below.
Treatment goal
The goal remains complete cessation of spasms. With certain approaches described in this protocol, spasm freedom has been reported within 1–3 months.
References
DOI: 10.3978/j.issn.2224-4336.2015.09.01
- defines symptomatic infantile spasms as those patients with either abnormal development and/or a clear etiology for the infantile spasms and cryptogenic spasms as those occurring in the context of normal development without a clear etiology.
- For example, patients with tuberous sclerosis are more likely to respond to treatment with vigabatrin, whereas patients without an identified etiology may respond better to hormonal therapy.
- Many other treatment options continue to be explored, including the ketogenic diet, traditional anti-epileptic medications, and resective surgery in select cases.
- The goal of treatment of infantile spasms remains complete cessation of spasms.
- Spasm freedom has been reported in 14–65% of patients within 1–3 months.
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