Clinical diagnosis and treatment outcomes for parapharyngeal space schwannomas

A single-institution review of 21 cases

Yoichiro Sato, Yorihisa Imanishi, Toshiki Tomita, Hiroyuki Ozawa, Koji Sakamoto, Ryoichi Fujii, Seiji Shigetomi, Noboru Habu, Kuninori Otsuka, Yoshihiro Watanabe, Mariko Sekimizu, Kaoru Ogawa

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Background: Because the incidence of schwannoma arising from the parapharyngeal space (PPS) is very low, no studies have analyzed extirpation methods and postoperative neurological complications exclusively in PPS schwannomas. Methods: The preoperative diagnosis and clinical outcomes of surgical treatment in 21 patients with PPS schwannoma who underwent surgery were investigated. Results: Neurological deficit of the involved nerve developed in all patients regardless of the extirpation method used. However, the incidence of first bite syndrome in sympathetic chain schwannoma was significantly lower after intracapsular enucleation (40%) than after total resection (100%; P=.045). Furthermore, the incidence of postoperative complications unrelated to the involved nerve was lower after intracapsular enucleation (0%) than after total resection (42.9%; P=.055). Conclusion: Although postoperative neurological deficit of the involved nerve was unavoidable in PPS schwannoma, intracapsular enucleation could be beneficial by reducing its severity and the incidence of complications unrelated to the involved nerve.

Original languageEnglish
JournalHead and Neck
DOIs
Publication statusAccepted/In press - 2017 Jan 1

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Neurilemmoma
Incidence
Bites and Stings

Keywords

  • Intracapsular enucleation
  • Nerve of origin
  • Neurological deficits
  • Parapharyngeal space schwannoma
  • Preoperative diagnosis

ASJC Scopus subject areas

  • Otorhinolaryngology

Cite this

Clinical diagnosis and treatment outcomes for parapharyngeal space schwannomas : A single-institution review of 21 cases. / Sato, Yoichiro; Imanishi, Yorihisa; Tomita, Toshiki; Ozawa, Hiroyuki; Sakamoto, Koji; Fujii, Ryoichi; Shigetomi, Seiji; Habu, Noboru; Otsuka, Kuninori; Watanabe, Yoshihiro; Sekimizu, Mariko; Ogawa, Kaoru.

In: Head and Neck, 01.01.2017.

Research output: Contribution to journalArticle

Sato, Yoichiro ; Imanishi, Yorihisa ; Tomita, Toshiki ; Ozawa, Hiroyuki ; Sakamoto, Koji ; Fujii, Ryoichi ; Shigetomi, Seiji ; Habu, Noboru ; Otsuka, Kuninori ; Watanabe, Yoshihiro ; Sekimizu, Mariko ; Ogawa, Kaoru. / Clinical diagnosis and treatment outcomes for parapharyngeal space schwannomas : A single-institution review of 21 cases. In: Head and Neck. 2017.
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