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The Impact of Paratracheal Lymph Node Metastasis in Squamous Cell Carcinoma of the Hypopharynx

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The Impact of Paratracheal Lymph Node Metastasis in Squamous Cell Carcinoma of the Hypopharynx Eur Arch Otorhinolaryngol (2010) 267:945–950 DOI 10.1007/s00405-009-1166-6 HEAD AND NECK The impact of paratracheal lymph node metastasis in squamous cell carcinoma of the hypopharynx Young-Hoon Joo · Dong-Il Sun · Kwang-Jae Cho · Jung-Hae Cho · Min-Sik Kim Received: 15 June 2009 / Accepted: 16 November 2009 / Published online: 1 December 2009 © The Author(s) 2009. This article is published with open access at Springerlink.com Abstract The aim of this study was to analyze the preva- the surgical treatment of patients with SCC of the postcri- lence and prognostic importance of paratracheal lymph coid and/or pyriform sinus with clinical node metastases. nodes in squamous cell carcinoma of the hypopharynx. A retrospective review of 64 previously untreated patients Keywords Hypopharynx · Squamous cell carcinoma · with squamous cell carcinoma (SCC) of the hypopharynx Lymph nodes · Neck dissection that underwent surgery was performed. Ipsilateral paratrac- heal lymph node metastases occurred in 22% (14 out of 64) and the mean number of paratracheal lymph nodes dis- Introduction sected per side was 2.3 (range 1–6). Contralateral paratrac- heal lymph node metastases were present in 2% (1 out of The hypopharynx is subdivided anatomically into three 42). Sixty-seven percent with postcricoid SCC and 22% areas: the pyriform sinus, the posterior pharyngeal wall, with pyriform sinus SCC developed clinical node-positive and the postcricoid region. Among these sites, carcinomas ipsilateral paratracheal lymph node metastases, whereas develop most frequently in the pyriform sinus region. Hyp- 11% with posterior pharyngeal wall SCC developed para- opharyngeal squamous cell carcinoma (SCC) is a very tracheal metastases. There was a signiWcant correlation aggressive cancer that is generally diagnosed at advanced between paratracheal lymph node metastasis and cervical stages and consequently has a poor prognosis and low sur- metastasis (p = 0.005), and the primary tumor site (postcri- vival. More than 75% of patients with hypopharyngeal coid, 57.1%; pyriform sinus, 20.0%; posterior pharyngeal tumors have stage III or IV disease at presentation [1]. Cer- wall, 8.3%) (p = 0.039). Patients with no evidence of para- vical metastases are present in 60–80% of patients and sig- tracheal lymph node metastasis may have a survival beneWt nify more advanced disease and a poorer prognosis [2, 3]. (5-year disease-speciWc survival rate, 60 vs. 29%). How- For this reason, treatment modalities for SCCs at these sites ever, this result did not reach statistical signiWcance must address the potential for spread of disease to the neck, (p = 0.071). The patients with SCC of the postcricoid and/ even for early primary tumors. In this regard, both surgery or pyriform sinus were at risk for ipsilateral paratracheal and radiotherapy are the mainstays of most curative eVorts lymph node metastasis; furthermore, patients with paratrac- aimed at this disease. heal node metastasis had a high frequency of cervical Metastases to the thyroid gland and paratracheal lymph metastasis and a poorer prognosis. Therefore, routine ipsi- nodes occur in 30% of patients with hypopharyngeal lateral paratracheal node dissection is recommended during tumors [4]. A 20% frequency of occult nodal metastases to ipsilateral paratracheal lymph nodes has been reported in patients with postcricoid lesions and tumors that involve Y.-H. Joo · D.-I. Sun · K.-J. Cho · J.-H. Cho · M.-S. Kim (&) the pyriform fossa apex that are stage N0 [5]. For laryngeal/ Department of Otolaryngology-Head and Neck Surgery, hypopharngeal and upper esophageal tumors metastatic College of Medicine, Kangnam St. Mary’s Hospital, disease involving the paratracheal nodal group has been The Catholic University of Korea, 505 Banpodong, Seochogu, Seoul 137-040, Korea implicated in recurrent disease, particularly in patients with e-mail: [email protected]; [email protected] peristomal recurrence; this suggests the prognostic 123 946 Eur Arch Otorhinolaryngol (2010) 267:945–950 signiWcance of positive paratracheal metastatic spread Kangnam St Mary’s Hospital (Seoul, Korea) approved this [6, 7]. Treatment planning for patients with paratracheal retrospective review of the medical records and the use of metastasis must take into consideration the likelihood of archived tumor specimens. regional recurrence and/or distant metastasis. The purpose of this study was to analyze the paratracheal Surgical procedures nodal yield and frequency of metastases, and determine their relationship with cervical nodal metastases, and over- For tumor excision, 40 (63%) patients had conservative sur- all survival in patients with hypopharyngeal SCC. gery with laryngeal preservation, 15 (23%) had total laryn- gectomy with partial pharyngectomy, 7 (11%) had total laryngopharyngectomy, and 2 (3%) had a total laryn- Materials and methods gopharyngoesophagectomy. En bloc resection was per- formed according to the surgical procedures. Laryngeal Patients resection was performed under direct vision based on the invasion of the tumor. The resection of the posterior pha- The study group consisted of 64 patients that were not pre- ryngeal wall was determined by a safe tumor margin of up viously treated for SCC of the hypopharynx; they under- to two-thirds of the lateral dimension of the pharyngeal went surgery at the Department of Otolaryngology-Head wall. The inferior margin could be 2 cm below the upper and Neck Surgery, College of Medicine, The Catholic margin of the cervical esophagus without causing any post- University of Korea, Seoul, Korea, from October 1993 to operative functional problems. The surgical defects were June 2008. The cases were reviewed retrospectively. The reconstructed with a radial forearm free Xap in 36 cases, diagnostic evaluations at presentation included a complete pectoralis major myocutaneous Xap in 7 cases, anterolateral physical examination, panendoscopy, CT and/or MRI scans thigh free Xap in 4 cases, and a gastric pull-up in 2 cases. of the head and neck, chest X-rays, and laboratory tests. We All patients had neck dissection at the time of the primary assessed the CT and/or MRI to determine the regional surgery: a radical neck dissection was performed in 27 lymph node status. The panendoscopy was mainly per- cases, a modiWed radical neck dissection in 20 cases, and a formed under general anesthesia, and it consisted of a selective (level II–IV) neck dissection in 17 cases. For the microlaryngoscopy, bronchoscopy, and esophagoscopy. 56 contralateral cases, selective (level II–IV) neck dissec- The pharynx and upper esophagus were examined with a tion was performed in 48 patients and a modiWed radical rigid hypopharyngoscope. No patient had radiological evi- neck dissection in 8. Among the 64 patients that had sur- dence of distant metastases at presentation, and all patients gery, all patients had an ipsilateral paratracheal lymph node were treated with curative intent. At our institution, in prin- dissection and 42 patients had bilateral paratracheal node cipal, the choice of radical therapy is surgery, including dissections when there was clinical or radiological evidence partial pharyngectomy, and neck lymph node metastasis is of disease involvement of the cervical lymph nodes bilater- treated by neck dissection. Additional radio(chemo)therapy ally. The paratracheal node dissection included dissection is conducted in patient with multiple lymph nodes metasta- of all of the nodes between the carotid artery laterally and sis. For histopathologic examination, the formalin-Wxed the trachea medially, as far inferior into the superior surgical specimen was vertically or horizontally sectioned mediastinum as possible, through the cervical approach. depending on the extent of tumor involvement. The tissue There was no perioperative mortality. One patient required sections underwent standard histopathologic evaluation and re-exploration for vascular compromise of the radial fore- complete histopathologic review was done in all cases by a arm free Xap. Two patients developed marginal necrosis of single pathologist. The median age was 61.0 (range 34– the Xap, which resulted in pharyngocutaneous Wstulas that 75 years); there were 62 males and 2 females. The survival were managed by healing with secondary intention after outcomes of surgery group of patients were compared with debriding the necrotic tissue in the Xap. There were no the outcomes of patients with hypopharyngeal cancer who enteric strictures related to the Wstulas. Recurrent laryngeal were treated at our institution with deWnitive chemoradio- nerve injury occurred in two patients of the conservative sur- therapy. From October 1993 to June 2008, 38 patients were gery with laryngeal preservation. One patient could be dec- identiWed with SCC of the hypopharynx and had been annulated, whereas the other patients required the retainer. treated with concurrent chemoradiotherapy. Of this group 16 patients were treated with curative intent. The patients Postoperative radiotherapy were staged according to the 2002 American Joint Commit- tee on Cancer (AJCC) staging system. The follow-up Indications and modalities for adjuvant treatments varied period ranged from 7 to 128 months, with a mean of over time: positive or close margins found on the resection, 36.1 months. The Institutional Review Board of the advanced T stage, lymphovascular invasion, perineural 123 Eur Arch Otorhinolaryngol (2010) 267:945–950 947 invasion, multiple nodal metastasis, or extracapsular spread Table
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