筛窦或上颌窦肿瘤向周围组织侵犯或压迫而继发慢性泪囊炎,易误诊为单纯性慢性泪囊炎而漏诊原发肿瘤,延误治疗时机,现将临床误诊两例报告如下: 例1、男性、52岁,主诉左眼反复流泪、流脓2年。曾在当地诊断“泪囊炎”,治疗效果不佳转我院, The ethmoid sinus or maxillary sinus tumor invades or compresses the surrounding tissue and is secondary to chronic dacryocystitis. It is often misdiagnosed as simple chronic dacryocystitis and missed diagnosis of the primary tumor, delaying the timing of treatment. Two cases of clinical misdiagnosis are now reported as follows: Example 1 Male, 52 years old, complained of repeated tears and pus for the left eye for 2 years. He had diagnosed “dacryocystitis” in the local area and the treatment was not effective.