Abnormal Red Blood Cells Forming (video) Florida Atlantic University Share Print E-Mail Loading video... Caption Sickle cell disease is a hereditary blood disorder that affects red blood cells, distorting their natural disc shape into a crescent moon or "sickle" shape. Credit Melanie Gonick/MIT [with footage from Ming Dao]; Proceedings of the National Academy of Sciences. Usage Restrictions Please include video credit. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.