Abstract
Adenocarcinoma occurs very rarely in the paranasal sinuses; moreover, adenocarcinoma diagnosed in the external nose is rarely reported. A 58-year-old male patient visited our hospital with an enlarged right nasal mass. On image studies, a 1.5 cm sized mass was found on the right nasolabial fold, which was surgically removed via sublabial approach. Intraoperative frozen section examination showed inflammatory tissue without tumor cells. However, adenocarcinoma showing infiltration between the skeletal muscle layers was diagnosed on the final histopathologic examination after surgery. In the immunohistochemical staining test, CK7 positive, CK20 negative, and GCDFP-15 positive were confirmed, so metastasis of adenocarcinoma was considered first rather than primary cancer of the nasolabial fold. There was no recurrence and no tumor development in other sites after postoperative chemoradiation therapy of 32 months.
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