A 21-year-old client with seizures and nodules is most likely diagnosed with which condition?

The condition most likely associated with a 21-year-old client who has seizures and nodules is Tuberous Sclerosis. This genetic disorder is characterized by the growth of non-cancerous tumors, known as hamartomas, in various organs, particularly in the brain, skin, kidneys, and heart. Seizures are a common neurological manifestation of Tuberous Sclerosis due to the involvement of the central nervous system.

The presence of both seizures and nodules aligns well with the clinical presentation of Tuberous Sclerosis, where the nodules can often be seen in the form of skin lesions such as angiofibromas or subungual fibromas, along with cerebral tubers that can lead to seizure activity.

This distinguishes Tuberous Sclerosis from the other conditions listed, as they do not typically present with this specific combination of symptoms. Multiple Sclerosis mainly affects the central nervous system and does not generally present with nodules. Autism Spectrum Disorder primarily manifests with developmental challenges and behavioral differences rather than seizures and physical nodules. Down Syndrome is associated with distinct physical traits and developmental delays but not typically with seizures related to nodular growths.