Iino Y, Maruyama H, Mikata R, Yasui S, Koroki K, Nagashima H, Awatsu M, Shingyoji A, Kusakabe Y, Kobayashi K, Kiyono S, Nakamura M, Ohyama H, Sugiyama H, Sakai Y, Chiba T, Kato J, Tsuyuguchi T, Kato N. Percutaneous Two-Dimensional Shear Wave Elastography for Diagnosis of Pancreatic Tumor.
Diagnostics (Basel) 2021;
11:diagnostics11030498. [PMID:
33799777 PMCID:
PMC8001884 DOI:
10.3390/diagnostics11030498]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 03/03/2021] [Accepted: 03/05/2021] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND
To investigate the efficacy of two-dimensional shear wave elastography (2D-SWE) for the diagnosis of pancreatic mass lesions.
METHODS
This ethics committee-approved cross-sectional study included 52 patients with histologically-proven pancreatic tumors (pancreatic ductal adenocarcinoma (PDAC), 36; tumor-forming pancreatitis (TFP), 15; neuroendocrine tumor, 1) and 33 control subjects. The 2D-SWE was performed for the tumor/non-tumor tissues, and SWE-mapping patterns and propagation quality were assessed.
RESULTS
Three mapping patterns were detected based on the size and distribution of the coloring areas. Pattern A (whole coloring) was detected in all non-tumor tissues and TFP, whereas pattern C (multiple small coloring spots) was detected in PDAC only. Pattern B (partial coloring with smaller spots) was detected in other lesions. The specificity and positive predictive value of pattern A for non-PDAC and those of pattern C for PDAC were 100%. The SWE value was higher in tumor lesions than in the non-tumor tissues (38.1 vs. 9.8 kPa; p < 0.001) in patients with PDAC. The SWE value in the non-tumor lesion was higher in patients with PDAC than in control (9.8 vs. 7.5 kPa; p < 0.001).
CONCLUSIONS
2D-SWE may play a role as a novel diagnostic tool for PDAC to detect a specific mapping pattern with quantitative assessment.
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