Following a seizure, approximately 3 in every 10 people are diagnosed with a brain tumor (via Hackensack Meridian Health). These seizures, or convulsions, can take different forms. Cancer.Net explains that myoclonic seizures involve either one or more muscle spasms. A person experiencing a tonic-clonic seizure, on the other hand, may fall unconscious before muscle contractions set in. Complex partial seizures may also involve loss of consciousness, as well as involuntary repetitive twitching.
The National Health Service (NHS) states that brain tumor-related seizures may occur in one singular limb or throughout the body as a whole. In a unique 2008 case study published in the Annals of Indian Academy of Neurology, a man in his mid-30s presented with muscle spasms in the ankle, knee, and hip, amongst other symptoms. Medically referred to as flexor spasms, the researchers noted that these types of muscle spasms are usually seen in connection with abnormal tissue growth on the spine. However, the patient was subsequently diagnosed with a brain tumor.