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目的：探讨梨状窝癌侵犯梨状窝尖的临床意义。方法：对43例梨状窝癌全喉下咽切除标本的次连续切片进行病理组织学观察。结果：梨状窝尖是梨状窝下1／3部分，梨状窝癌侵犯梨状窝尖易侵犯邻近组织和器官。结论：梨状窝尖受侵是癌组织向下咽下方侵犯的初始部位和重要标志，因此，外科治疗应以全喉及病例下咽切除为宜。
Objective: To explore the clinical significance of Piriformis carcinoma invasion of Piriformis. Methods: Histopathological observations were performed on 43 consecutive cases of pharyngocarcinoma. RESULTS: The tip of the pear-shaped fossa was the lower part of the pear-shaped fossa. Piriform carcinoma invaded the pear-shaped fossa and was prone to invasion of adjacent tissues and organs. Conclusion: The invasion of the piriform fossa tip is the initial site and an important sign of invasion of the cancerous tissue to the lower part of the hypopharynx. Therefore, surgical treatment should be performed with total laryngectomy and hypopharyngectomy.