By watching this video you learn about what thyroglossal cyst is, its characteristics, presentation, classic examination findings, differential diagnosis, investigation findings and specific surgical treatment commonly done. Timeline: 0:00 – What is thyroglossal duct cyst? 1:22 – Presentation and features 5:05 – Investigation and examination 6:47 – Midline swellings of neck 7:30 – Thyroid cyst (differential) 8:00 – Surgical treatment (Sistrunk’s operation) 9:26 - Summary