<prompt> Dactylitis in children due to:Sickle cell anemiaThalassemiaOsteomyelitisHereditary spherocytosis  <response>: Ref. The Short Textbook of Pediatrics. Pg 644 Dactylitis also called hand-foot syndrome is painful swelling of the hands or feet.This is often the first symptom that may show up in small infants or toddlers with sickle cell disease. Dactylitis is caused by sickled red blood cells blocking the small blood vessels in the hands and feet. Other causesTBSarcoidosisSyphilisSpondyloarthritisInfection - Commonly caused by skin infections, such as Streptococcus or Staphylococcus 