The inflammatory cell infiltration in submucous tissue was mainly that of neutrophil cells with few eosinophil cells.Edema and cyst were also found in the submucous tissue.

• 病理学检查：息肉被覆假复层纤毛柱状上皮，黏膜下炎性细胞浸润，主要为中性粒细胞，嗜酸性细胞浸润较少见，间质水肿，并有潴留囊肿形成，囊肿为单个，较大，内有炎性潴留物。