Lymphatic mapping with SPECT-CT for evaluation of contralateral drainage in lateralized oropharyngeal cancers using an awake injection technique

Academic Article

Abstract

  • Background: Risk of contralateral nodal metastases in oropharyngeal squamous cell carcinoma (OPSCC) is currently based on clinical risk factors. We propose lymphatic mapping with single photon emission computed tomography (SPECT-CT) for tumor-specific delineation of lymphatic drainage to guide treatment. Methods: Retrospective review of lymphatic drainage patterns in cT1-2 OPSCC and contralateral cN0 neck with a nonoperative, awake injection of 99 m-Tc sulfur colloid and SPECT-CT. Results: Ten patients were reviewed. Primary sites included tonsil (n = 8, 80%) and tongue base (n = 2, 20%). All patients tolerated awake injections with no complications. Nine patients (90%) demonstrated satisfactory migration of radiotracer to neck node(s) with seven (78%) to the ipsilateral lateral neck, one (11%) to the ipsilateral lateral neck and retropharynx, and one (11%) to bilateral lateral neck nodes. Conclusions: Characterization of lymphatic drainage in OPSCC is feasible using a nonoperative injection technique and SPECT-CT. Drainage to the contralateral neck is rare, warranting further study to tailor treatment appropriately.
  • Authors

    Digital Object Identifier (doi)

    Pubmed Id

  • 20077321
  • Author List

  • Thomas CM; Khan MN; Mohan R; Hendler A; Hosni A; Chepeha DB; Goldstein DP; Cooper RM; de Almeida JR
  • Start Page

  • 385
  • End Page

  • 393
  • Volume

  • 42
  • Issue

  • 3