Purpose To explore the relationship between expression of PCNA and COX-2 in the early laryngeal cancer with negative surgical margins and the local recurrence of tumor. Methods Totally 63 patients with early laryngeal cancer were enrolled in this stud-y, CO2 laser surgery was adopted as treatment, the expression of PCNA and COX-2 was detected in the resected tumor tissue and surgi-cal margins, and the survival and tumor recurrence were also observed. Results The positive rate of the expression of PCNA and COX-2 in the 63 patients with early laryngeal cancer tumor tissues were 73. 02% and 71. 43%, while that in the cutting edge were 33. 33% and 30. 16%, respectively. The expression of PCNA and COX-2 in tumor tissue and cutting edge were of all positive in 41 cases and 13 cases, and the positive rate was 65. 08% and 20. 63%, respectively. In the all followed-up patients, 17 cases were detected of local recurrence, the recurrence rate was 26. 98%, and the recurrence rate in the patients with PCNA positive was 71. 43%, while in the patients with COX-2 positive was 73. 68% (P<0. 05). The combined detection of PCNA and COX-2 positive recurrence rate was significantly higher than that of single positive (P<0. 05). Conclusion PCNA and COX-2 in the early laryngeal cancer with negative surgical margins are important biological markers for the evaluation of prognosis of laryngeal cancer patients, and to formulate the subse-quent treatment regimen. The combined detection of two proteins is more reliable for postoperative management.%目的：探讨早期喉癌手术阴性切缘组织中PCNA、COX-2的表达与肿瘤局部复发的关系。方法选择63例经CO2激光手术治疗后的早期喉癌患者标本,对切除的肿瘤组织及切缘组织中PCNA、COX-2表达进行检测,所有患者均随访2年以上,对其生存及肿瘤复发情况进行观察。结果63例早期喉癌患者肿瘤组织中PCNA、COX-2阳性率分别为73．02%、71．43%；切缘组织中PCNA和COX-2阳性率分别为33．33%、30．16%。肿瘤组织与切缘组织中PCNA、COX-2均阳性的患者分别为41例和13例,阳性率分别为65．08%、20．63%；63例随访病例中,局部复发17例,复发率为26．98%。 PCNA阳性患者复发率为71.43%,COX-2阳性患者复发率为73．68%(P<0．05)。联合检测PCNA和COX-2阳性者复发率明显高于单独阳性者(P<0．05)。结论早期喉癌手术切缘组织中PCNA、COX-2的表达是喉癌患者预后的重要生物学标志,并可根据检查结果制定针对性的后续治疗方案,联合检测二者对术后治疗具有更可靠的指导意义。
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