The diagnostic value of CT and endoscopy in low-grade appendiceal mucinous neoplasms confined to the appendix

doi:10.3877/cma.j.issn.2095-7157.2021.01.004

Abstract

Abstract:

Objective

To investigate the features of CT and endoscopy in Low-grade appendiceal mucinous neoplasms confined to the appendix (LAMNs).

Methods

Fifteen cases with histologically proven LAMNs confined to the appendix were included in this study from January 2014 to December 2019. Clinical data, and the characteristics of CT and endoscopy examinations were retrospectively analyzed.

Results

All patients had received CT and endoscopy examinations before surgery. In CT images, the median size is 5.8 (2.5-11.0) cm. All tumors had well-circumscribed margins. In enhanced CT images, early mild ring mural enhancement of the cystic wall was observed. The endoscopy examinations showed a round mass protruding from the appendiceal orifice, with normal overlying mucosa in most cases. Eight cases received EUS examinations, which showed an "onion skin" sign. All cases were treated with surgery, including 7 cases undergoing appendectomy and 8 receiving right hemicolectomy.

Conclusions

Although preoperative diagnosis of LAMNs confined to the appendix remains challenging, LAMNs should be considered when the "onion skin" sign is detected on EUS.

Key words: Low-grade appendiceal mucinous neoplasms, Endoscopy, Computed tomography (CT), Endoscopic ultrasonography (EUS)

Chunyan Peng, Bei Tang, Hui Wang, Wei Zhang, Shanshan Shen, Ying Lv. The diagnostic value of CT and endoscopy in low-grade appendiceal mucinous neoplasms confined to the appendix[J]. Chinese Journal of Gastrointestinal Endoscopy(Electronic Edition), 2021, 08(01): 24-28.

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References 20

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