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Lingual lymph nodes

Lingual lymph nodes are small, paired lymph nodes located along the ventral and lateral aspects of the tongue, embedded within the submucosal and sublingual connective tissue. They are typically 1–4 mm in size and lie between the genioglossus and hyoglossus muscles, near the sublingual glands and lingual artery. These nodes are part of the oral and submandibular lymphatic chain and receive lymphatic drainage from the anterior and lateral tongue, floor of the mouth, and ventral oral mucosa. They ultimately drain into the submandibular and deep cervical lymph nodes. Lingual lymph nodes are usually not palpable but may become enlarged in infections, inflammatory conditions, or oral cavity malignancies, particularly squamous cell carcinoma of the tongue.

Synonyms

  • Tongue lymph nodes

  • Sublingual lymph nodes

  • Ventrolateral tongue nodes

  • Lingual oral lymph nodes

Function

  • Filter lymph from the anterior, lateral, and ventral tongue and floor of mouth

  • Participate in immune surveillance of the oral cavity

  • Early detection of infection or tumor spread in the tongue and floor of the mouth

  • Drain lymph into submandibular and deep cervical lymph nodes, maintaining oral lymphatic flow

MRI Appearance

T1-weighted images:

  • Lingual lymph nodes appear as small, oval, hypointense to intermediate signal structures within the submucosal fat of the tongue and floor of mouth

  • Surrounded by hyperintense fatty tissue, providing natural contrast

  • Pathological nodes may appear enlarged, rounded, or show cortical thickening

T1 Post-Contrast (Gadolinium-enhanced):

  • Normal nodes may show mild homogeneous enhancement

  • Inflamed or metastatic nodes demonstrate marked homogeneous or heterogeneous enhancement, highlighting the cortex and fatty hilum

  • Particularly helpful in oral malignancy staging and early metastatic detection

T2-weighted images:

  • Nodes appear intermediate to hyperintense, while surrounding submucosal fat is bright

  • Useful for identifying edema, inflammatory changes, or infiltrative disease

  • Fatty hilum, if present, appears slightly hyperintense relative to cortex

STIR (Short Tau Inversion Recovery):

  • Fat suppression highlights node edema or pathology

  • Normal nodes remain low to intermediate signal; inflamed or metastatic nodes appear hyperintense

  • Excellent for detecting small or early lymphadenopathy in the oral cavity

CT Appearance:

  • Lingual lymph nodes appear as small, soft tissue density nodules within the submucosa of the tongue and floor of mouth

  • Surrounded by air in the oral cavity, which provides natural contrast, and adjacent muscle tissue of intermediate density

  • Enlarged or pathological nodes appear as well-defined or irregular soft tissue masses

  • CT is particularly useful for preoperative planning, tumor staging, and detecting metastatic involvement

MRI images

Lingual lymph nodes mri axial image -img-00000-00000