Elective neck dissection is indicated for cN0 patients with PNI-positive tumors for the efficacy of improving disease-specific survival as well as neck control. However, low-risk PNI-positive patients who undergo neck dissection do not need postoperative adjuvant therapy, because the residual risk from PNI is minimal.

B-3b.

This study aims to determine the relationship between nasal septal deviation, concha bullosa, and chronic rhinosinusitis by using a definitive pathological and simplified model. Fifty-two consecutive sinus computed tomography scans were performed on patients who received endoscopic sinus surgery and whose final diagnosis was paranasal sinus fungus balls. The incidences of nasal septal deviation and concha bullosa for patients diagnosed with paranasal sinus fungus balls among the study group were 42.3% and 25%, respectively. About 63.6% sinuses with fungus balls were located on the ipsilateral side of the nasal septal deviation, and 46.2% were located on the ipsilateral side of the concha bullosa. When examined by Pearson's chi-square test and the chi-squared goodness-of-fit test, no significant statistical difference for the presence of paranasal sinus fungus balls between ipsilateral and contralateral sides of nasal septal deviation and concha bullosa was noted (P = 0.292 and P = 0.593, resp.). In conclusion, we could not demonstrate any statistically significant correlation between the location of infected paranasal sinus, the direction of nasal septal deviation, and the location of concha bullosa, in location-limited rhinosinusitis lesions such as paranasal sinus fungal balls. We conclude that the anatomical variants discussed herein do not predispose patients to rhinosinusitis.

Amyloidosis results from the deposition of amyloid proteins in organs and tissues. Clinically, it can be classified into systemic and localized forms. Here, we report a case of localized amyloidosis of the nasopharynx and neck. The initial presentation was a nasopharyngeal mass, and bilateral neck masses, mimicking nasopharyngeal carcinoma with neck metastasis. Computed tomographic scans of the neck revealed asymmetry between the bilateral nasopharyngeal walls, and multiple radio-opaque masses in both sides of the neck. A nasopharyngeal biopsy was performed and confirmed amyloid deposition. Subsequent neck-mass excision biopsies confirmed that the neck masses were also amyloid deposits. Further laboratory examinations revealed no systemic involvement. There was no disease progression after local excision. Localized amyloidosis in the head and neck is rare, but can have various manifestations that may sometimes mimic neoplasms.