<prompt> Thyroglossal fistula develops due to:Developmental anomalyInjuryIncomplete removal of thyroglossal cystInflammatory disorder  <response>: Ans. c Incomplete removal of thyroglossal cystRef: Bailey and Love 26th edition, Page 701Thyroglossal fistula: Presents as midline discharging sinus. It is never Congenital - Always acquired. Caused by Infection, Inadequate removal or TG cyst or Inappropriate I and D by mistake. Complete excision of tract with Central part of hyoid bone is the TOC Sistrunk Operation 