患者女，42岁，农民。因左侧鼻腔间断流稀薄脓性分泌物8年，轻度鼻阻，有臭味，于1990年12月5日来我院门诊。检查：右侧鼻腔正常；左侧鼻腔粘膜色泽稍苍白，鼻底有少许分泌物潴留，下甲肿胀，中甲下缘平面以上有较多粘稠脓痂堆积。经清洁左侧鼻底分泌物后，用膝壮镊逐步清除上方的脓痂，发现 Female patient, 42 years old, farmer. Due to intermittent flow of left nasal discharge thin purulent secretions 8 years, mild nasal resistance, odor, in December 5, 1990 came to our hospital. Check: the right nasal normal; left nasal mucosa slightly pale color, a little secretions at the bottom of the nose retention, swelling under the armor, the lower edge of the plane in more thick accumulation of pus scab. After cleaning the left nasal discharge, with a strong knee force tweezers gradually remove the top of the pus scab and found