Jejunal biopsy through enteroscopic examination revealed atrophic villi and dense infiltration in lamina propria by lymphocytes, with extension beyond the layer of muscularis mucosa.

• 我们报告一例具典型临床症状的31岁男性患者，其空肠切片检查看到黏膜固有层中有致密的淋巴浆细胞浸润，浸润程度已穿越黏膜肌肉层。