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Hypopharyngeal Cancer

Understanding the Anatomy

The hypopharynx is a part of the throat. It is basically the lower throat. The hypopharynx is behind the voice box, below the oropharynx and just above the esophagus. It extends from the hyoid bone down to the uppermost muscle of the esophagus, which is called the cricopharyngeus muscle.

4a throat overview

There are three different parts of the hypopharynx:

  • Posterior pharyngeal wall: This is the back wall of the pharynx, from the level of the hyoid bone down to the esophagus. The wall is made up of constrictor muscles, and it basically sits on the tissue covering the vertebrae (spinal bones).
  • Pyriform sinuses on each side: There is one pyriform sinus on each side of the larynx. Each one is like an upside-down pyramid, with the tip pointing into the esophagus. This is the most common subsite for hypopharyngeal cancer.2 Shah JP, Shaha AR, Spiro RH, Strong EW. Carcinoma of the hypopharynx. Am J Surg. Oct 1976;132(4):439-443.
  • Post-cricoid area: This is the part of the throat just behind the cricoid cartilage. It opens directly into the esophagus. This is the least common subsite of hypopharyngeal cancer.2 Shah JP, Shaha AR, Spiro RH, Strong EW. Carcinoma of the hypopharynx. Am J Surg. Oct 1976;132(4):439-443.

26_hypopharynx

References

1 Harrison DF. Pathology of hypopharyngeal cancer in relation to surgical management. The Journal of laryngology and otology. Apr 1970;84(4):349-367.

2 Shah JP, Shaha AR, Spiro RH, Strong EW. Carcinoma of the hypopharynx. Am J Surg. Oct 1976;132(4):439-443.

3 Menvielle G, Luce D, Goldberg P, Leclerc A. Smoking, alcohol drinking, occupational exposures and social inequalities in hypopharyngeal and laryngeal cancer. International journal of epidemiology. Aug 2004;33(4):799-806.

4 Larsson LG, Sandstrom A, Westling P. Relationship of Plummer-Vinson disease to cancer of the upper alimentary tract in Sweden. Cancer research. Nov 1975;35(11 Pt. 2):3308-3316.

5 Marchand JL, Luce D, Leclerc A, et al. Laryngeal and hypopharyngeal cancer and occupational exposure to asbestos and man-made vitreous fibers: results of a case-control study. Am J Ind Med. Jun 2000;37(6):581-589.

6 Dolan RW, Vaughan CW, Fuleihan N. Symptoms in early head and neck cancer: an inadequate indicator. Otolaryngology--head and neck surgery: official journal of American Academy of Otolaryngology-Head and Neck Surgery. Nov 1998;119(5):463-467.

7 Spiro RH, Thaler HT, Hicks WF, Kher UA, Huvos AH, Strong EW. The importance of clinical staging of minor salivary gland carcinoma. Am J Surg. 1991 Oct;162(4):330-6.

8 Krause CJ, Carey TE, Ott RW, Hurbis C, McClatchey KD, Regezi JA. Human squamous cell carcinoma. Establishment and characterization of new permanent cell lines. Arch Otolaryngol. Nov 1981;107(11):703-710.

9 Referenced with permission from The NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelines®) for Head and Neck Cancers V.2.2016. © National Comprehensive Cancer Network, Inc 2016. All rights reserved. Accessed December 7, 2016. To view the most recent and complete version of the guideline, go online to www.nccn.org.

10 Piccirillo JF, Costas I, Reichman ME. Chapter 2: Cancers of the Head and Neck. Ries LAG, Young JL, Keel GE, Eisner MP, Lin YD, Horner M-J (editors). SEER Survival Monograph: Cancer Survival Among Adults: U.S. SEER Program, 1988-2001, Patient and Tumor Characteristics. National Cancer Institute, SEER Program, NIH Pub. No. 07-6215, Bethesda, MD, 2007.