Charcot–Marie–Tooth disease
While observing large family trees with many individuals having ataxia, Lazzarini noticed that many family members also had restless legs syndrome. Lazzarini is published in the fields of X-linked intellectual disability and other neurologic disorders such as restless legs syndrome, Charcot–Marie–Tooth disease, and prion diseases. She has been a contributor as well to the literature on genetic counseling.