The sublingual space is shaped like an inverted V with its apex pointing anteriorly and is located between the tongue musculature superiorly and the anterior one-third of the mylohyoid muscle inferolaterally which separates it from submandibular space. 


  • Posteriorly: as the sublingual space is not encapsulated by any fascial layer, it freely communicates along the posterior free border of the mylohyoid muscle with the submandibular and parapharyngeal spaces.
  • Anteriorly: the two sublingual spaces are communicating just below the frenulum via a small isthmus.
  • anterior border (apex): mandible
  • superior border: floor of mouth and intrinsic tongue muscles
  • medial border: geniohyoid and genioglossus muscle complex
  • lateral border: mylohyoid muscle



  • sublingual gland and duct
  • deep portion of the submandibular gland and duct
  • lingual nerve, artery and vein
  • glossopharyngeal (IX) and hypoglossal (XII) nerves


Related pathology 

  • ranula
  • salivary gland tumours
  • haemangioma
  • schwannoma
  • sialadenitis
  • Ludwig angina

Harnsberger HR, Glastonbury CM, Michel MA et-al. Diagnostic Imaging: Head and Neck. Lippincott Williams & Wilkins. (2010) ISBN:1931884781
Imaging of the Head and Neck. Thieme. (2012) ISBN:3131505311.
Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918)


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