Which of the following is not true regarding Thyroglossal cyst?

Thyroglossal cystO80% are found in juxtaposition to the hyoid boneOHeterotopic thyroid tissue present in 20% of cases.OSmooth, well-defined midline neck mass that moves upward with protrusion of the tongue.O1% of thyroglossal duct cysts are found to contain cancer ,Papillary (85%)."SISTRUNK OPERATION,"- en bloc cystectomy and excision of the central hyoid bone to minimize recurrence.