Complex sentence: Diseases that can cause foot drop include stroke, Amyotrophic lateral sclerosis (ALS or Lou Gehrig's Disease), muscular dystrophy, Charcot Marie Tooth disease, multiple sclerosis, and Friedreich's ataxia it may also occur as a result of hip replacement surgery.
Split into simpler sentences: Diseases that can cause foot drop include stroke, Amyotrophic lateral sclerosis (ALS or Lou Gehrig's Disease), muscular dystrophy, Charcot Marie Tooth disease, multiple sclerosis, and Friedreich's ataxia. It may also occur as a result of hip replacement surgery.