Which disorder presents with epilepsy, intellectual disability, and facial angiofibromas and is linked to TSC1 or TSC2 mutations?

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Multiple Choice

Which disorder presents with epilepsy, intellectual disability, and facial angiofibromas and is linked to TSC1 or TSC2 mutations?

Explanation:
Tuberous sclerosis complex arises from mutations in TSC1 or TSC2 and characteristically presents with epilepsy, intellectual disability, and facial angiofibromas. Mutations in these genes disrupt the TSC1-TSC2 protein complex, leading to overactivation of the mTOR pathway and the growth of hamartomas in multiple organs, especially the brain and skin. In the brain, cortical tubers and subependymal nodules drive seizures and contribute to developmental problems, while the skin shows the classic facial angiofibromas (often on the cheeks and nose) along with other lesions like ash-leaf spots and shagreen patches. This combination helps distinguish tuberous sclerosis from other disorders such as Angelman syndrome, Sturge-Weber syndrome, and Neurofibromatosis type 1, which have different genetic causes and hallmark features.

Tuberous sclerosis complex arises from mutations in TSC1 or TSC2 and characteristically presents with epilepsy, intellectual disability, and facial angiofibromas. Mutations in these genes disrupt the TSC1-TSC2 protein complex, leading to overactivation of the mTOR pathway and the growth of hamartomas in multiple organs, especially the brain and skin. In the brain, cortical tubers and subependymal nodules drive seizures and contribute to developmental problems, while the skin shows the classic facial angiofibromas (often on the cheeks and nose) along with other lesions like ash-leaf spots and shagreen patches. This combination helps distinguish tuberous sclerosis from other disorders such as Angelman syndrome, Sturge-Weber syndrome, and Neurofibromatosis type 1, which have different genetic causes and hallmark features.

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