Endoscopic Ultrasound-guided Fine-needle Biopsy Research Articles

Site of puncture in endoscopic ultrasound-guided fine needle biopsy: Does it change diagnostic outcome?

Site of puncture in endoscopic ultrasound-guided fine needle biopsy: Does it change diagnostic outcome?

Strategic insights into the cultivation of pancreatic cancer organoids from endoscopic ultrasonography-guided biopsy tissue

BACKGROUND The frequent suboptimal efficacy of endoscopic ultrasound-guided fine-needle biopsy (EUS-FNB) to culture pancreatic cancer (PC) organoids (PCOs) poses a major challenge in the advancement of personalized medicine for advanced PC. AIM To explore how to obtain appropriate puncture tissues from EUS-FNB and optimize the strategy for efficiently constructing PCOs, providing an efficient tool for the advancement of personalized medicine. METHODS Patients who underwent EUS-FNB for the diagnosis of PC tissue were prospectively enrolled. We refined the endoscopic biopsy procedures and organoid cultivation techniques. All tissue specimens verified by on-site pathological assessment were cultured in a semi-suspended medium in a microfluidic environment. We assessed differences in PCOs cultured beyond and below five generations examining patient demographics, specimen and organoid attributes, and the sensitivity of organoids to a panel of clinical drugs through cell viability assays. RESULTS In this study, 16 patients with PC were recruited, one sample was excluded because onsite cytopathology showed no tumor cells. Successful organoid generation occurred in 93.3% (14 of 15) of the EUS-FNB specimens, with 60% (9 of 15) sustaining over five generations. Among these patients, those with a history of diabetes, familial cancer, or larger tumors exhibited enhanced PCO expandability. The key factors influencing long-term PCOs expansion included initial needle sample quality (P = 0.005), rapid initiation of organoid culture post-isolation (P ≤ 0.001), and high organoid activity (P = 0.031). Drug sensitivity analysis revealed a partial response in two patients following therapeutic intervention and surgery and stable disease in four patients, indicating a moderate correlation between organoid response and clinical outcomes. CONCLUSION Optimal initial needle sampling, rapid and precise biopsy sample processing, process isolated samples as soon as possible, and sufficient cellular material are crucial for successful cultivating PCOs. High organoid activity is an important factor in maintaining their long-term expansion, which is essential for shortening the time of drug sensitivity analysis and is the basis of PC research.

Endoscopic Ultrasound Assessment of Solid Pseudopapillary Neoplasm of the Pancreas: Case Series in Latin American Population

Introduction: Solid pseudopapillary tumors of the pancreas (SPN) are uncommon lesions. Endoscopic ultrasound is considered the standard examination because of its capability to acquire a suitable core tissue sample. This study details the experience of eleven cases within a Latin American population diagnosed with SPNs through the endoscopic ultrasound-guided fine needle biopsy (EUS-FNB) approach. Methods: Retrospective reviews of records from a 6-year period, from January 2018 to December 2023, were performed at Clínica Reina Sofía in Bogotá, Colombia. We included eleven patients with surgically proven solid pseudopapillary tumors who had undergone preoperative EUS−FNB. The clinical history, EUS findings, biopsies, and immunohistochemical profile were reviewed. Results: In this study of eleven SPN patients (median age: 31.9 years, 90.1% female, all Hispanic), abdominal pain (63.6%) was the predominant symptom. The indication for EUS was predominantly a pancreas-dependent mass (90.1%). Tumors were located more frequently on the pancreatic neck, with regular morphology, well-defined borders, and predominantly hypoechoic and heterogeneous appearances on EUS. The average tumor diameter was 4.3 cm [range 1.2- 10 cm]. Most tumors were solid (63.6%), and elastography revealed a mixed pattern. EUS-Doppler indicated hypovascularity in all cases. Vascular compression occurred in three patients. No lymph nodes were observed. There were no complications related to the procedure. The histopathological analysis using EUS-FNB yielded consistent results with post-surgical biopsies. Conclusion: In the context of diagnostic evaluation for SPNs, EUS-FNB emerges as a pivotal procedure. In this descriptive study, EUS-FNB showed a remarkable preoperative diagnostic yield of 100% compared to post-surgical histopathology for solid pseudopapillary tumors.

Identification of Endosonographic Features that Compromise EUS-FNB Diagnostic Accuracy in Pancreatic Masses.

Endoscopic ultrasound-guided fine-needle biopsy (EUS-FNB) is highly accurate for diagnosing pancreatic mass. However, making diagnosis is challenging in 5-20% of patients. This study investigated the challenging features associated with reduced diagnostic performance in EUS-FNB and potential rescue methods that can improve the diagnostic rate. This single-center retrospective study included patients with solid pancreatic tumors who underwent EUS-FNB between January 1, 2019, and December 12, 2021. Patients without a computed tomography (CT) scan or definite diagnosis were excluded. Challenging features were features that reduced diagnostic accuracy in EUS-FNB, as determined through multivariate analysis. Rescue methods were methods that assisted operators in assessing lesions in patients with challenging features. Of 332 enrolled patients, an accurate diagnosis obtained using EUS-FNB was achieved in 286 (86.1%). Univariable analysis revealed that the diagnostic accuracy was lower in cases of pancreatic tumors with isoattenuation in CT images (77.3% vs. 89.8%, odds ratio [OR]: 0.39, p = 0.003), an ill-defined margin on EUS (61.2% vs. 92.5%, OR: 0.13, p < 0.001), or tumor size < 20mm (65.5% vs. 88.1%, OR: 0.26, p = 0.002). However, only ill-defined margins on EUS (OR: 0.14, p < 0.001) and tumor size < 20mm (OR: 0.25, p = 0.005) were independent predictors of inconclusive EUS-FNB in the multivariate analysis. The use of contrast (OR: 4.46, p = 0.026) and a highly experienced endosonographer (> 5cases/month; OR: 3.25, p = 0.034) improved diagnostic performance in difficult cases. Pancreatic tumors with ill-defined tumor margins on EUS or size < 20mm are challenging features in EUS-FNB. The use of contrast and a highly experienced endosonographer can improve diagnostic performance in difficult cases.

Disseminated Cryptococcus over pancreas, lung, and brain: a case report

BackgroundCryptococcus is an opportunistic infection acquired through inhalation from the environment, primarily affecting individuals with compromised immune systems. It typically leads to pneumonia upon passing through lung tissue. The infection can disseminate to various organs via the bloodstream, resulting in meningitis or encephalitis in the central nervous system. Disseminated Cryptococcus has been reported to involve the skin, liver, eyes, lymph nodes, bone marrow, spleen, kidneys, and intestines, significantly increasing morbidity and mortality. However, pancreatic involvement in Cryptococcus is relatively rare, and a few case reports have highlighted severe organ damage and high mortality rates.Case presentationIn this case report, we present the case of a 36-year-old Asian man who presented with a 2-week history of headaches and blurred vision in his right eye. Brain magnetic resonance imaging revealed multiple brain masses, along with a mass in the lower left lung field and a tumor in the pancreatic tail, as detected by chest computed tomography. Endoscopic ultrasound-guided fine needle biopsy and computed tomography-guided lung biopsy confirmed the diagnosis of disseminated cryptococcal infection involving the pancreas, lung, and brain. The patient’s clinical condition improved following antifungal therapy. Additionally, we identified anti-granulocyte–macrophage colony-stimulating factor antibody as a risk factor for disseminated cryptococcal infection in this patient.ConclusionDisseminated cryptococcosis can be a potentially lethal condition, as highlighted by previous literature. However, early diagnosis using contrast-enhanced harmonic endoscopic ultrasound and endoscopic ultrasound-guided biopsies, as well as prompt treatment as demonstrated in our case, can improve outcomes and prevent mortality.

Thoracoscopic and endoscopic cooperative surgery for esophageal gastrointestinal stromal tumor: a case report

BackgroundEsophageal gastrointestinal stromal tumors (GISTs) are relatively rare, accounting for 2–5% of all GISTs. Typically, the treatment is surgery in nature. However, no standard procedure established for esophageal GISTs, and in many cases, subtotal esophagectomy or local resection via thoracoscopy or mediastinoscopy is performed. Thoracoscopic and endoscopic cooperative surgery (TECS) is a surgical approach similar to laparoscopic and endoscopic cooperative surgery used for gastric GIST; however, no reports of its use for esophageal GIST have been published to date. We herein report such a case along with a review of past literature.Case presentationThe patient was a 60-year-old man. Upper gastrointestinal contrast imaging revealed a subepithelial lesion in the esophagus. An 18 × 17 mm subepithelial lesion was identified in the left wall, 35 cm from the upper incisors, during upper gastrointestinal endoscopy, and was diagnosed as a GIST through endoscopic ultrasound-guided fine needle biopsy. TECS was therefore performed. The patient was placed in a prone position with his face to the left. After confirming the lesion under endoscopy and left thoracoscopy, the periesophageal area of the lesion was dissected under thoracoscopy. Subsequently, an endoscopic full-layer resection was performed. Finally, the excision site of the lesion was sutured under thoracoscopy. The operation took a total of 3 h and 22 min, with a blood loss of 50 mL.ConclusionsThe appropriate surgical procedure for esophageal GIST should be considered according to the location and size of the lesion. TECS ensures that the resection margins are secured using an endoscopic or thoracoscopic approach. Furthermore, TECS is minimally invasive, avoiding esophagectomy and reconstruction, which makes it a potential surgical option for esophageal GISTs.

Endoscopic Ultrasound-guided Transesophageal Fine-Needle Biopsy of Lung Masses: Diagnostic Performance and Safety

Pulmonary masses are a diagnostic challenge in the field of endoscopic ultrasound(EUS) tissue acquisition, especially through transesophageal EUS-FNB(fine needle biopsy). Our study evaluated the feasibility, diagnostic performance, and safety of EUS-FNB of pulmonary lesions. Fifty-three patients were enrolled in a prospective registry. All of the EUS procedures were performed by experienced endosonographers. Outcomes were specimen adequacy, diagnostic accuracy, diagnostic sensibility, diagnostic specificity, and safety. The mean age was 70±10.4, and 71.7% were male. The mean lesion size was 52.4±23.3 mm, and patients had mostly a single lesion(86.8%). Most of the patients had advanced stage at diagnosis(stage IV, 41.82%), and the most common lung cancer was non-small cell lung carcinoma(69.4%). Diagnostic adequacy rate was 92.86%, and diagnostic accuracy was 87.5%. Adverse events were reported in 3 procedures. Transesophageal EUS-FNB is a feasible and safe diagnostic method of tissue sampling for lung masses reachable by EUS.

S4054 Endoscopic Ultrasound-Guided Fine-Needle Biopsy Unveils a Rare Mediastinal Ectopic Thyroid in an Elderly Male

S4054 Endoscopic Ultrasound-Guided Fine-Needle Biopsy Unveils a Rare Mediastinal Ectopic Thyroid in an Elderly Male

Endoscopic ultrasound-guided fine needle biopsy using macroscopic on-site evaluation technique reduces the number passes yet maintains a high diagnostic accuracy: A randomized study.

Although rapid on-site cytological evaluation (ROSE) for endoscopic ultrasound (EUS)-guided tissue acquisition (EUS-TA) may increase diagnostic yield, it is not widely available. Macroscopic on-site evaluation (MOSE) is an alternative modality although it is not standardized for EUS-guided fine-needle biopsy (FNB). We evaluated diagnostic performance of MOSE compared with conventional technique of EUS-TA using core biopsy needle. Consecutive patients undergoing EUS-FNA for solid lesions were randomized to MOSE or conventional arms. The primary and secondary outcome measures were diagnostic accuracy, diagnostic yield, sensitivity, specificity, positive and negative predictive values, and the number of passes, respectively. The optimum parameters for macroscopic visible core (MVC, i.e., length, number) by MOSE to achieve accurate diagnosis were evaluated. Ninety-six patients (48 conventional and 48 MOSE) were enrolled. Mean lesion size was larger in MOSE arm (32.67±7.22 vs 29.31±6.98mm, P=0.023). Diagnostic accuracy (95.8% vs 91.6%), diagnostic yield (97.9% vs 95.8%), procedure duration, and adverse events of the two methods were similar. Median number of passes with MOSE was less (2 vs 3 P=0.000). Area under the receiver operating characteristic curve showed that with MOSE, obtaining a total MVC length of 11.5mm had 93.3% sensitivity, and 2.5 MVC cores (each 4mm) had 86.7% sensitivity for malignancy diagnosis. EUS-FNB with MOSE, a simple reliable technique, can achieve a high and comparable diagnostic accuracy with lesser number of passes. Obtaining longer length and greater number of MVC increase the sensitivity to diagnose malignancy with MOSE.

Evaluation of Needles in Endoscopic Ultrasound-Guided Tissue Acquisition of Pancreatic Cancer for Genetic Yield and Quality.

Endoscopic ultrasound-guided fine needle biopsy (FNB) is the gold standard in tissue acquisition of pancreatic ductal adenocarcinoma (PDAC). There is a paucity of evidence of the impact of needle type or size on the genetic yield and quality. Patients 18 years and older with PDAC who underwent FNB were retrospectively identified from a single database from 2016 to 2021. Genetic quantity is measured in micrograms (µg) and quality defined by RNA or DNA integrity number (RIN and DIN). FNB needles examined were Acquire 22 gauge (Boston Scientific, Marlborough, MA, USA) and ProCore 22 and 20 gauges (Cook Medical, Bloomington, IN, USA). Two hundred seventy-seven patients were identified. ProCore 20G needle procured higher RNA quantity (4125.8µg, IQR: 2003.8, 5954.8, p = 0.012) compared to ProCore 22G (2050µg IQR: 966.4, 3181.6) and Acquire 22G (2310.6µg, IQR: 1439.3, 4312). Median DNA quantity was 3340.5µg (Acquire 22G), 2610.4µg (ProCore 22G) and 3499.7µg (ProCore 20G) (p = 0.763). Median DIN was 7.3 (Acquire 22G and ProCore 22G) and 7.4 (ProCore 20G) (p = 0.449). Median RIN was 3.0 (Acquire 22G and ProCore 22G) and 2.7 (ProCore 20G) (p = 0.886). ProCore 20G was associated with higher quantity of RNA. There were no differences in the quality acquired by different needles.

Same versus separate sessions of endoscopic ultrasound-guided fine-needle biopsy and endoscopic retrograde cholangiopancreatography for distal malignant biliary obstruction: a propensity score-matched study

ABSTRACT Background Same-session endoscopic ultrasound (EUS) and endoscopic retrograde cholangiopancreatography (ERCP) is an attractive policy for patients with distal malignant biliary obstruction (DMBO) requiring fine-needle biopsy (FNB) and biliary drainage. However, scanty and conflicting data exists regarding safety and efficacy when comparing these two procedures performed in same versus separate sessions. Methods Single-center, retrospective, propensity score-matched study including patients with DMBO who underwent EUS-FNB followed by ERCP during the same or separate sessions. The primary outcome was the safety of the procedure [number of patients experiencing adverse events (AEs), overall AEs, its severity, post-ERCP pancreatitis (PEP)]. Secondary outcomes were successful ERCP, use of advanced cannulation techniques, EUS-FNB adequacy, length of hospital stay, overall procedure time, and time to recurrent biliary obstruction. Results After propensity matching, 87 patients were allocated to each group. AEs developed in 23 (26.4%) vs. 17 (19.5%) patients in the same and separate sessions group, respectively (p = 0.280). The overall number, the severity of AEs, and the rate of PEP were similar in the two groups. Secondary outcome parameters were also comparable in the 2 groups. Conclusions Same-session EUS-FNB followed by ERCP with biliary drainage is safe and does not impair technical outcomes of tissue adequacy and biliary cannulation.

Multicenter, randomized controlled trial of EUS-guided fine-needle biopsy using a fork-tip needle with macroscopic or rapid on-site evaluation for pancreatic lesions (H2O trial)

ABSTRACT Background and Objectives According to previous reports, EUS–fine-needle biopsy (FNB) with or without rapid on-site evaluation (ROSE) showed the nonsuperiority of EUS-FNB + ROSE over EUS-FNB. However, previous studies included various kinds of FNB needle. This might be a critical limitation due to heterogeneity. Therefore, the aim of the present multicenter, randomized controlled trial was to compare the diagnostic accuracy of the fork-tip needle with or without ROSE for pancreatic lesions. Methods In the ROSE group, if an adequate sample was obtained to diagnose by on-site evaluation, EUS-FNB was stopped. If cytological results were insufficient or indeterminate, EUS-FNB was repeated. In the macroscopic on-site evaluation (MOSE) group, if a 4-mm length of visible core tissue was obtained, EUS-FNB was finished. If visible core tissue was not obtained or was less than 4 mm in length, a second puncture was attempted. Results One hundred seventy-one patients were randomized, 85 to the ROSE group and 86 to the MOSE group. In the MOSE group, diagnostic sensitivity and accuracy were 94.4% and 91.8%, respectively, for visible core tissue and 80.6% and 70.0%, respectively, for red tissue. Finally, overall diagnostic sensitivity and accuracy were 97.1% and 95.3%, respectively, in the ROSE group and 95.8% and 95.3%, respectively, in the MOSE group. Although there were no significant differences regarding adverse events between groups, the mean number of punctures was significantly lower in the MOSE group than in the ROSE group (1.47 vs. 1.20, P = 0.0171). Conclusions EUS-FNB using a fork-tip needle for pancreatic lesions has high diagnostic yield even without ROSE.

A comparison of endoscopic ultrasoundguided fine needle aspiration and fine needle biopsy for pancreatic masses, gastrointestinal subepithelial lesions, and lymph nodes

A comparison of endoscopic ultrasoundguided fine needle aspiration and fine needle biopsy for pancreatic masses, gastrointestinal subepithelial lesions, and lymph nodes

The role of EUS in the diagnosis of early chronic pancreatitis.

The diagnosis of early chronic pancreatitis (ECP) is challenging due to the lack of standardized diagnostic criteria. EUS has been considered a sensitive diagnostic modality for chronic pancreatitis (CP), with advancements in technique such as EUS-guided fine needle aspiration and biopsy (EUS-FNA/FNB) being developed. However, their role in the diagnosis of ECP remains unelucidated. This review thereby aimed to provide an overview of the clinical landscape of EUS in the field of ECP.

Comparison of clinical/histological outcomes according to puncture sites in endoscopic ultrasound-guided fine needle biopsy for large pancreatic masses: Multicenter randomized prospective pilot study.

There are no recommendations regarding the optimal puncture site in endoscopic ultrasound-guided fine needle biopsy (EUS-FNB). This multicenter randomized prospective study compared the diagnostic accuracy and histological findings according to the sampling site for pancreatic masses larger than 3 cm. Consecutive patients with pancreatic masses larger than 3 cm indicated for EUS-FNB were included in the study. Patients were randomly assigned to two groups for the initial puncture site (central vs. peripheral sampling of the masses). A minimum of four passes were performed, alternating between the center and the periphery. The primary outcome was diagnostic accuracy. A total of 100 patients were equally divided into the central group and the peripheral group. The final diagnosis revealed malignancy in 95 patients (pancreatic cancer [n = 89], neuroendocrine tumor [n = 4], lymphoma [n = 1], metastatic carcinoma [n = 1]), and benign conditions in five patients (chronic pancreatitis [n = 4], autoimmune pancreatitis [n = 1]). There was no significant difference in diagnostic accuracy between the puncture sites. However, combining samples from both areas resulted in higher diagnostic accuracy (97.0%) compared to either area alone, with corresponding values of 88.0% for the center (P = 0.02) and 85.0% for the periphery (P = 0.006). Both central sampling and peripheral sampling showed equivalent diagnostic accuracy in detecting malignancy. However, combining samples from both areas generated superior diagnostic yield compared to using either sampling site alone. For pancreatic masses larger than 3 cm, it is advisable to consider sampling from various areas of the masses to maximize the diagnostic yield.

Expanding the boundaries of EUS: EUS-guided fiducial placement and fine-needle biopsy in oligometastatic disease of the adrenal gland

Expanding the boundaries of EUS: EUS-guided fiducial placement and fine-needle biopsy in oligometastatic disease of the adrenal gland

Mass Forming Autoimmune Pancreatitis, Misdiagnosed as Pancreatic Cancer: Case Report

Autoimmune pancreatitis is characterized by infiltration of the pancreas parenchyma by immunoglobulin G4 (IgG4)-positive plasma cells, chronic inflammation, and fibrosis. It can affect the entire body depending on the subtype. Distinguishing mass-forming type autoimmune pancreatitis from pancreatic cancer can often be challenging. A 60-year-old male presented to our outpatient clinic with abdominal discomfort. Computed tomography revealed a 4.8 cm mass in the pancreatic head obstructing the common bile duct. Endoscopic ultrasound-guided fine needle biopsy and endoscopic retrograde cholangiopancreatography with biliary drainage were performed. Pathological examination revealed no malignant cells, but more than 20 IgG4-positive cells were observed. Following two weeks of steroid treatment, the patient’s symptoms improved, and follow-up imaging showed a reduction in the size of the pancreatic head mass. Herein, we report a case of mass-forming autoimmune pancreatitis initially misdiagnosed as pancreatic cancer.

Lymphadenopathy Tissue Sampling by EUS-Guided Fine-Needle Biopsy Contributes to Meeting the Conditions for Genomic Profiling.

EUS-guided fine-needle biopsy (EUS-FNB) performed with a Franseen needle or Fork-tip needle enables greater tissue acquisition. However, it is unknown whether EUS-FNB could contribute to lymphadenopathy genomic profiling. The aim of this study was to determine the efficacy of EUS-FNB using a Franseen or Fork-tip needle for tissue acquisition and genomic profiling in patients with lymphadenopathy. Patients with abdominal lymphadenopathy who underwent EUS-guided fine needle aspiration (FNA)/EUS-FNB were included in this study. The amount of acquired tissue and its suitability for genomic profiling were compared between FNA and FNB. Specimen quality was evaluated by a widely used pathologic adequacy scoring system (0: insufficient; 1 to 2: cytologic; 3: limited histologic; 4 to 5: sufficient histologic). The criteria of FoundationOne CDx (F1CDx) and NCC Oncopanel (NOP) were used to assess the suitability for genomic profiling. In total, 72 patients underwent EUS-FNA, and the other 20 patients underwent EUS-FNB. The pathologic adequacy score and suitability for genomic profiling based on the criteria were significantly higher for FNB than for FNA [histologic adequacy score: 5 (4 to 5) versus 3 (0 to 5), P<0.01; F1CDx: 16.7% vs. 0%, P=0.01; NOP: 66.7% vs. 7.5%, P<0.01]. In multivariate analysis, EUS-FNB was identified as the only factor that influenced the suitability for genomic profiling based on the above-mentioned criteria (odds ratio 19.5, 95% CI: 3.74-102, P<0.01). EUS-FNB performed using Franseen or Fork-tip needles may result in greater lymphadenopathy tissue acquisition and thus enhanced suitability for genomic profiling compared with EUS-FNA.

First case report of pancreatic angiomyolipoma diagnosed by EUS-guided fine-needle biopsy.

First case report of pancreatic angiomyolipoma diagnosed by EUS-guided fine-needle biopsy.

Mutational profiling of 103 unresectable pancreatic ductal adenocarcinomas using EUS-guided fine-needle biopsy.

Pancreatic ductal adenocarcinoma (PDAC) is among the most lethal cancers, with a 5-year survival rate of around 9%. Only 20% are candidates for surgery. Most unresectable patients undergo EUS-guided fine-needle biopsy (EUS-FNB) for diagnosis. Identification of targetable mutations using next-generation sequencing (NGS) is increasingly requested. Data on feasibility of EUS-FNB for NGS and knowledge regarding mutational profile of unresectable PDAC are scarce. We evaluated the "technical yield" of EUS-FNB for NGS in unresectable PDAC: relative fraction of diagnostic EUS-FNBs meeting technical criteria. We also investigated the "molecular yield": relative fraction of EUS-FNBs included in NGS containing sufficient DNA for detection of at least one mutation. Furthermore, we determined the relative frequency of cancer-associated mutations in unresectable PDAC. Formalin-fixed and paraffin-embedded EUS-FNBs diagnostic of unresectable PDAC and fulfilling these criteria were included (n = 105): minimum 3-mm2 tissue, minimum of 2-mm2 tumor area, and minimum 20% relative tumor area. NGS was performed using Ion GeneStudio S5 Prime System and Oncomine™ Comprehensive Assay v.3 including 161 cancer-related genes. Technical yield was 48% (105/219) and molecular yield was 98% (103/105). Most frequently mutated genes were KRAS (89.3%) and TP53 (69.9%), followed by CDKN2A (24.3%), ARID1A (9.7%), SMAD4 (7.8%), TSC2 (7.8%), and CCND3 (6.8%). EUS-FNB for NGS of unresectable PDAC is feasible. Our technical criteria for NGS, using leftovers in formalin-fixed and paraffin-embedded blocks after routine pathology diagnosis, were met by around half of EUS-FNBs. Almost all EUS-FNBs fulfilling the technical criteria yielded a successful NGS analysis.