Cowden Syndrome 1, also known as bannayan-riley-ruvalcaba syndrome, is related to cowden syndrome 4 and cowden syndrome, and has symptoms including seizures, action tremor and cerebellar ataxia. An important gene associated with Cowden Syndrome 1 is PTEN (Phosphatase And Tensin Homolog), and among its related pathways/superpathways are Infectious disease and ERK Signaling. The drugs Everolimus and Temsirolimus have been mentioned in the context of this disorder. Affiliated tissues include cerebellum and skin, and related phenotypes are macrocephaly and seizure