Abstract:
BACKGROUND:The efficacy of immune checkpoint blockade in the treatment of microsatellite instability (MSI)-high tumors was recently reported. Therefore, the acquisition of histological specimens is desired in cases of unresectable solid pancreatic lesions (UR SPLs). This study investigated the efficacy of endoscopic ultrasound-guided fine-needle biopsy (EUS-FNB) using a Franseen needle for UR SPL tissue acquisition and MSI evaluation. METHODS:A total of 195 SPL patients who underwent EUS-guided fine-needle aspiration (EUS-FNA) or EUS-FNB (EUS-FNAB) between January 2017 and March 2020 were enrolled in this study. Among them, 89 SPL patients (FNB: 28, FNA: 61) underwent EUS-FNAB using a 22-G needle (UR SPLs: 58, FNB: 22, FNA: 36) (UR SPLs after starting MSI evaluation: 23, FNB: 9, FNA: 14). RESULTS:The puncture number was significantly lower with FNB than with FNA (median (range): 3 (2-5) vs 4 (1-8), P < 0.01, UR SPLs: 3 (2-5) vs 4 (1-8), P = 0.036). Histological specimen acquisition was more commonly achieved with FNB than with FNA (92.9% (26/28) vs 68.9% (42/61), P = 0.015, UR SPLs: 100% (22/22) vs 72.2% (26/36), P < 0.01). The histological specimen required for MSI evaluation was acquired more often with FNB than with FNA (88.9% (8/9) vs 35.7% (5/14), P = 0.03). CONCLUSIONS:EUS-FNB using a Franseen needle is efficient for histological specimen acquisition and sampling the required amount of specimen for MSI evaluation in UR SPL patients.
journal_name
BMC Cancerjournal_title
BMC cancerauthors
Sugimoto M,Irie H,Takagi T,Suzuki R,Konno N,Asama H,Sato Y,Nakamura J,Takasumi M,Hashimoto M,Kato T,Kobashi R,Kobayashi Y,Hashimoto Y,Hikichi T,Ohira Hdoi
10.1186/s12885-020-07588-5subject
Has Abstractpub_date
2020-11-11 00:00:00pages
1094issue
1issn
1471-2407pii
10.1186/s12885-020-07588-5journal_volume
20pub_type
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