A Novel CCM3 Mutation Associated with a Severe Clinical Course in a Child with Multiple Cerebral Cavernous Malformations

Background: Cerebral cavernous malformations (CCMs) are vascular lesions linked to mutations in the CCM1, CCM2, and CCM3 genes, resulting in angiogenesis dysregulation. This case study highlights the clinical course of a child with severe CCMs and explores the genetic basis of the condition. Methods: We used comprehensive clinical assessment and magnetic resonance imaging (MRI) to monitor the patient’s neurological status and CCM progression and genetic analysis by whole-exome sequencing to identify mutations in CCM-related genes. Results: The patient presented with developmental delays, multiple CCMs, and recurrent hemorrhagic events, requiring five surgical interventions. Genetic analysis revealed a novel frameshift mutation in the PDCD10 gene. Despite surgical efforts, the patient developed significant disability by age 13. Conclusions: This case illustrates the aggressive clinical course associated with CCMs, particularly in patients with CCM3 mutations. It underscores the importance of genetic screening and monitoring in understanding hereditary CCM progression and guiding treatment strategies.