The role of endobronchial ultrasound-guided transbronchial needle aspiration in the differential diagnosis of isolated mediastinal and/or hilar lymphadenopathy.

INTRODUCTION: Isolated mediastinal and/or hilar lymphadenopathy (IMHL) has become an increasingly common finding as a result of the increased use of thoracic imaging modalities. Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) is accepted as the first step diagnostic method in the differential diagnosis of IMHL. OBJECTIVE: To determine the diagnostic yield of the procedure and to analyze clinical and sonographic findings that can be used to differentiate the etiology of lymph node pathologies. METHODS: Patients who underwent EBUS-TBNA procedure between March 2017 and March 2020 were included in this retrospective study. Demographic data, symptoms, comorbid diseases, and EBUS findings were obtained from the records of the patients. RESULTS: EBUS-TBNA provided a diagnosis in 88 patients out of 120 patients (granulomatous diseases n = 54, malignant diseases n = 21, and anthracotic lymph nodes n = 13), and 32 patients had a negative EBUS-TBNA. 22/32 negative EBUS-TBNA samples were true negatives (reactive lymphadenopathy). The sensitivity of the procedure was 89.8% while negative predict value was 68.7%, diagnostic yield of 91.6%. Patients with reactive lymph nodes had significantly more comorbidities (77.3%-19.4%, p < .001) and a lower number of lymph node stations (1.6 ± 0.8-2.7 ± 0.9, p < .001). Patients with anthracotic lymph nodes were older and mostly consisted of females (11/13, p < .001). CONCLUSION: EBUS-TBNA has high-diagnostic efficiency in the differential diagnosis of IMHL. The number and size of lymph node stations can provide useful information for differential diagnosis. Clinical follow-up can be a more beneficial approach in patients with reactive and anthracotic lymph nodes before invasive sampling.

KRAS/GNAS-testing by highly sensitive deep targeted next generation sequencing improves the endoscopic ultrasound-guided workup of suspected mucinous neoplasms of the pancreas.

Pancreatic cysts or dilated pancreatic ducts are often found by cross-sectional imaging, but only mucinous lesions can become malignant. Therefore, distinction between mucinous and non-mucinous lesions is crucial for adequate patient management. We performed a prospective study including targeted next generation sequencing (NGS) of cell-free DNA in the diagnostic endoscopic ultrasound (EUS)-guided workup. Pancreatic cyst(s) or main duct fluid obtained by EUS-guided FNA was analysed by carcinoembryonic antigen (CEA), cytology and deep targeted NGS of 14 known gastrointestinal cancer genes (AKT1, BRAF, CTNNB1, EGFR, ERBB2, FBXW7, GNAS, KRAS, MAP2K1, NRAS, PIK3CA, SMAD4, TP53, APC) with a limit of detection down to variant allele frequency of 0.01%. Results were correlated to histopathology and clinical follow-up. One hundred and thirteen patients with pancreatic cyst(s) and/or a dilated pancreatic main duct (≥5 mm) were screened. Sixty-six patients had to be excluded, mainly due to inoperability or small cyst size (≤10 mm). Forty-seven patients were enrolled for further analysis. A final diagnosis was available in 27 cases including 8 negative controls. In 43/47 (91.5%) of patients a KRAS- and/or GNAS-mutation was diagnosed by NGS. 27.0% of the KRAS-mutated and 10.0% of the GNAS-mutated lesions harbored multiple mutations. KRAS/GNAS-testing by NGS, cytology, and CEA had a sensitivity and specificity of 94.7/100%, 38.1/100%, and 42.1/75.0%, respectively. KRAS/GNAS-testing was significantly superior to CEA (P = .0209) and cytology (P = .0016). In conclusion, KRAS/GNAS-testing by deep targeted NGS is a suitable method to distinguish mucinous from non-mucinous pancreatic lesions, suggesting its usage as a single diagnostic test. Results must be confirmed in a larger cohort.

Diagnostic yield and safety of the ProCore versus the standard EBUS-TBNA needle in subjects with suspected sarcoidosis.

Background: No randomized trial has compared the yield of the ProCore needle, a novel needle for endobronchial ultrasound (EBUS)-guided transbronchial needle aspiration (TBNA), with standard needles.Research design and methods: Consecutive subjects with intrathoracic lymphadenopathy due to suspected sarcoidosis were randomized 1:1 to undergo EBUS-TBNA with either the 22-gauge ProCore (EchoTip-ProCore, Cook-Medical) or the 22-gauge standard (Vizishot, Olympus) needle. The primary outcome was the diagnostic sensitivity; the secondary outcomes included the number of adequate aspirates obtained and procedure-related complications.Results: We randomized 100 (mean age, 43.4 years; 53% women) subjects. Of the 84 subjects finally diagnosed with sarcoidosis, the sensitivity of EBUS-TBNA was higher with the ProCore (36/42, 85.7%) versus the standard needle (31/42, 73.8%), although not statistically significant (p = 0.18). We obtained adequate aspirates in 95.2% and 90.5% subjects in the ProCore and the standard needle groups, respectively (p = 0.68). One complication (transient hypoxemia) occurred in each group. There were two incidences of the ProCore needle getting bent during the procedure.Conclusions: We found no difference in the sensitivity, specimen adequacy, or safety of EBUS-TBNA when performed with the ProCore or the Olympus needle in subjects with sarcoidosis. Larger studies are required to confirm our findings.[clinicaltrials.gov: NCT03656003].

IS THE NEW PROCORE 20G DOUBLE FORWARD-BEVEL NEEDLE CAPABLE TO OBTAIN BETTER HISTOLOGICAL SAMPLES BY ENDOSCOPIC ULTRASOUND FOR DIAGNOSING SOLID PANCREATIC LESIONS?

BACKGROUND: Fine needle biopsy (FNB) histological samples by endoscopic ultrasound. It is important to obtain representative histological samples of solid biliopancreatic lesions without a clear indication for resection. The role of new needles in such task is yet to be determined. AIM: To compare performance assessment between 20G double fine needle biopsy (FNB) and conventional 22G fine needle aspiration (FNA) needles for endoscopic ultrasound (EUS)-guided biopsy. METHODS: This prospective study examined 20 patients who underwent the random puncture of solid pancreatic lesions with both needles and the analysis of tissue samples by a single pathologist. RESULTS: The ProCore 20G FNB needle provided more adequate tissue samples (16 vs. 9, p=0.039) with better cellularity quantitative scores (11 vs. 5, p=0.002) and larger diameter of the histological sample (1.51±1.3 mm vs. 0.94±0.55 mm, p=0.032) than the 22G needle. The technical success, puncture difficulty, and sample bleeding were similar between groups. The sensitivity, specificity, and diagnostic accuracy were 88.9%, 100%, and 90% and 77.8%, 100%, and 78.9% for the 20G and 22G needles, respectively. CONCLUSIONS: The samples obtained with the ProCore 20G FNB showed better histological parameters; although there was no difference in the diagnostic performance between the two needles, these findings may improve pathologist performance.

Prospective study of EUS-guided tissue acquisition with a 20G core biopsy needle with a forward bevel for solid pancreatic mass.

ABSTRACT: There is a growing need for tissue collection for immunostaining and genetic testing. Recently, several fine-needle biopsy needles are commercially available for endoscopic ultrasound-guided tissue acquisition.This prospective historical controlled study evaluates a 20G core biopsy needle with a forward bevel for solid pancreatic masses larger than 15 mm in diameter. The primary endpoint was the accuracy of histological diagnosis. The secondary endpoints included technical success rate, sample adequacy for histology, cytological diagnostic accuracy, and adverse events.Seventy consecutive patients were enrolled between January and October 2017. We achieved technical success in all cases regardless of the puncture sites or the endosonographer's experience. The final diagnoses were neoplasms in 67 patients (95.7%; pancreatic cancer in 65 patients, neuroendocrine neoplasm in 1, and malignant lymphoma in 1) and benign lesions in 3 patients (4.3%; autoimmune pancreatitis in 2 patients and mass-forming pancreatitis in 1). The obtained specimens were adequate for histological evaluation in all cases and the histological accuracy was 91.4% (95% confidence interval, 82.3-96.8%, P < .05) with the sensitivity and specificity of 91.0% and 100%, respectively. The cytological diagnostic accuracy was 95.7% and all patients were accurately diagnosed by combining cytological and histological examinations. As for adverse events, an asymptomatic needle fracture occurred in 1 case (1.4%).This 20G core biopsy needle with a forward bevel showed a high accuracy of histological diagnosis for solid pancreatic masses.

A Comparative Study of 22G versus 19G Needles for EUS-Guided Biopsies for Parenchymal Liver Disease: Are Thinner Needles Better?

BACKGROUND AND AIMS: Data on comparative efficacy of various available endoscopic ultrasound-guided liver biopsy (EUS-LB) needles are limited. We sought to compare the performance of a novel Franseen-tip 22G fine-needle biopsy (FNB) device to that of 19G needle platforms for liver parenchyma. METHODS: Consecutive patients referred for EUS and suspected to have hepatic parenchymal disease underwent EUS-LB using different EUS needles and were included in this retrospective study. Two blinded expert liver pathologists independently reviewed and reported on: total number of tissue fragments, length of longest fragment, number of complete and incomplete portal tracts (CPT and IPT), and specimen adequacy. RESULTS: A 22G Franseen-tip needle (A) was used in 30 patients; 19G Tru-Cut needle (B) in 50 patients; 19G reverse beveled non-Tru-Cut needle (C) in 27 patients; and a 19G flexible non-Tru-Cut needle (D) in 28 patients. In the order of needles, A, B, C and D, > 10 tissue fragments were obtained in 100%, 6%, 82%, and 96% samples, the mean number of CPTs was 6.9; 3.0; 7.3; and 16.9, length of longest fragment was 3.8, 4. 7, 3.9, and 8.4 mm, and specimen adequacy was 66.7%, 46%, 82.1%, and 81.5%, respectively. A positive correlation was obtained between number of CPTs and length of longest fragment in samples accrued by 19G needles. CONCLUSION: EUS-LB specimens using 22G Franseen-tip needle appear highly fragmented, leading to inferior specimen adequacy compared to 19G non-Tru-Cut needles. We also report on using length of longest fragment as an additional criterion for specimen adequacy as it positively correlates with number of CPTs standard.

A correlation study between thyroid imaging report and data systems and the Bethesda system for reporting thyroid cytology with surgical follow-up - an ultrasound-trained cytopathologist's experience.

INTRODUCTION: Thyroid Imaging Reporting and Data Systems (TI-RADS) including a modified system (M TI-RADS) and American College Radiology (ACR) TI-RADS are introduced. Correlation studies between both TI-RADSs and The Bethesda System for Reporting Thyroid Cytology (TBSRTC) for Ultrasound-guided fine-needle aspiration (US-FNA) cases with surgical follow-up (SFU) are presented. MATERIALS AND METHODS: Three hundred and forty six thyroid US-FNA cases performed at the US-FNA clinic of Stony Brook University Hospital by an Ultrasound-trained interventional Cytopathologist between December 1, 2014 to February 28, 2018 were reviewed. All ultrasound images from 346 cases were evaluated and assigned M TI-RADS scores based on ultrasound features present in Table 1. One hundred and fifty four cases from Dcember 1, 2014 to February 28, 2016 were assigned scores using ACR TI-RADS.TBSRTC category along with SFU data was collected and correlated with both TI-RADS scores by using Pearson's correlation coefficient (r). Sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and overall accuracy for M TI-RADS and TBSRTC were also calculated using SFU diagnosis as a gold standard. McNemar test was applied to evaluate the significance of the difference between M TI-RADS and TBSRTC. RESULTS: Based on 346 thyroid nodules studied, the overall r-value between M TI-RADS scores and TBSRTC categories is 0.465. The r-values between Composition, Echogenicity, Shape, Margin, Echogenic foci, the summary points, and the converted TR level of ACR TI-RADS and TBSRTC are 0.145, 0.042, 0.259, 0.310, 0.405, and 0.379, respectively. Fifty (14.5%) cases have SFUs. Considering TI-RADS 5&6 and TBSRTC 5&6 as positives, and TI-RADS 2 and TBSRTC 2 as negatives, the Sensitivity, Specificity, PPV, NPV, and accuracy are 96%, 53%, 76%, 89%, 79% for TI-RADS vs 100%, 93%, 96%, 100%, 97% for TBSRTC, respectively (P = .038). The data for indeterminate cases are summarized. CONCLUSION: Both TI-RADSs could be helpful to a moderate degree. M TI-RADS appeared to correlate to TBSRTC slightly better than that of ACR TI-RADS. TBSRTC is significantly more accurate than M TI-RADS for the majority of determined cases.

Similarities and differences in guidelines for the management of pancreatic cysts.

Accurate diagnosis of Pancreatic cysts (PC) is key in the management. The knowledge of indications for surgery, the role of endoscopic ultrasound-guided fine needle aspiration, cyst fluid analysis, imaging, and surveillance of PC are all important in the diagnosis and management of PC. Currently, there are many guidelines for the management of PC. The optimal use of these guidelines with a patient-centered approach helps diagnose early cancer and prevent the spread of cancer.

Endoscopic Ultrasound-Guided Fine Needle Biopsy Using 22-Gauge Franseen Needle for the Histological Diagnosis of Solid Lesions: A Multicenter Prospective Pilot Study.

BACKGROUND: Recently, a novel 22-gauge needle with three symmetric needle points and crown-shaped cutting heels, known as a Franseen needle, has been developed for endoscopic ultrasound-guided fine needle biopsy (EUS-FNB). AIM: To assess the histological material acquisition rate and histological diagnostic capability of the 22-gauge Franseen needle (AC22) during EUS-FNB for solid lesions. METHODS: This study was designed as an open-label, multicenter, prospective, single-arm pilot study of EUS-FNB using AC22 for the diagnosis of solid lesions. Three passes of FNB using AC22 were performed for all lesions. The primary endpoints were the histological material acquisition rate and histological diagnostic capability. The secondary endpoints were the technical success rate, quality of histological samples, number of passes for diagnosis, and safety. RESULTS: Between September 2017 and May 2018, 75 patients were enrolled. The final diagnoses were malignancy in 65 and benign in 10. Three passes of FNB were technically successful in all patients. The sensitivity, specificity, and accuracy for the malignancy of histological analyses were 92.3% (60/65), 100% (10/10), and 93.3% (70/75), respectively, for the first pass and 95.4% (62/65), 100% (10/10), and 96% (72/75), respectively, for combined three passes. The diagnostic yield plateaued after the second pass. Sufficient tissue samples for histological interpretation were obtained in 96% (72/75) and 100% (75/75) patients for the single pass and combined three passes, respectively. Two patients (2.7%) developed mild pancreatitis as an adverse event. CONCLUSION: EUS-FNB using AC22 showed high histological diagnostic capability with the high first pass yield. CLINICAL TRIALS REGISTRY: UMIN Clinical Trials Registry (UMIN ID: UMIN000036641).

Fine needle aspiration cytology of epididymal nodules and its corroboration with ultrasonographic-histological findings.

BACKGROUND: Fine needle aspiration cytology (FNAC) assisted with scrotal ultrasonography is the best preoperative diagnostic modality for palpable epididymal nodules. It also aids in their successive remedial approach as well as serves semi-therapeutically in cystic lesions. The objectives of this study are to recognize the spectrum of pathological conditions giving rise to epididymal nodules, then to compare them with corresponding ultrasound images, and to evaluate the histological features wherever practicable. METHODS: Total 62 patients underwent FNAC as well as sonographic evaluation for their epididymal nodules. Histopathology was performed in only 20 cases. RESULTS: Epididymitis either caused by tuberculosis (30.6%), or in its acute (11.3%) and chronic (8.1%) forms remained the commonest cytological diagnosis. Neoplastic lesions included mostly adenomatoid tumors (8.1%), and another case of seminomatous spread from ipsilateral testicular primary. Nineteen of the excised masses corroborated with their respective cytodiagnoses. The discrepant lesion was actually a papillary cystadenoma, which was cytologically misinterpreted as adenomatoid tumor. CONCLUSIONS: FNAC becomes the first-hand investigative measure for epididymal nodules, by virtue of its early, easy and highly accurate diagnostic implications. It segregates the patients into proper therapeutic protocol and thereby estranges those who really need operative management. When deployed together with ultrasound, the diagnostic accuracy of FNAC improves further.

Is the new procore 20g double forward-bevel needle capable to obtain better histological samples by endoscopic ultrasound for diagnosing solid pancreatic lesions? / A nova agulha procore 20g com bisel frontal duplo é capaz de obter melhores amostras histológicas por ecoendoscopia no diagnóstico de lesões sólidas pancreáticas?

ABSTRACT Background: It is important to obtain representative histological samples of solid biliopancreatic lesions without a clear indication for resection. The role of new needles in such task is yet to be determined. Aim: To compare performance assessment between 20G double fine needle biopsy (FNB) and conventional 22G fine needle aspiration (FNA) needles for endoscopic ultrasound (EUS)-guided biopsy. Methods: This prospective study examined 20 patients who underwent the random puncture of solid pancreatic lesions with both needles and the analysis of tissue samples by a single pathologist. Results: The ProCore 20G FNB needle provided more adequate tissue samples (16 vs. 9, p=0.039) with better cellularity quantitative scores (11 vs. 5, p=0.002) and larger diameter of the histological sample (1.51±1.3 mm vs. 0.94±0.55 mm, p=0.032) than the 22G needle. The technical success, puncture difficulty, and sample bleeding were similar between groups. The sensitivity, specificity, and diagnostic accuracy were 88.9%, 100%, and 90% and 77.8%, 100%, and 78.9% for the 20G and 22G needles, respectively. Conclusions: The samples obtained with the ProCore 20G FNB showed better histological parameters; although there was no difference in the diagnostic performance between the two needles, these findings may improve pathologist performance.

RESUMO Racional: As lesões sólidas pancreáticas não ressecáveis cirurgicamente demandam boa amostragem tecidual para definição histológica e condução oncológica . O papel das novas agulhas de ecopunção no aprimoramento diagnóstico ainda necessita elucidação. Objetivo: Comparar as biópsias guiadas por ecoendoscoopia com a nova agulha 20G de bisel frontal duplo (FNB) com a agulha de aspiração fina 22G convencional. Métodos: Este estudo prospectivo avaliou 20 pacientes submetidos à punção de lesões pancreáticas sólidas com ambas agulhas e envolveu análise de amostras teciduais por um único patologista. Resultados: A agulha FNB 20G forneceu amostras de tecido mais adequadas (16 vs. 9, p=0,039) com melhores escores quantitativos de celularidade (11 vs. 5, p=0,002) e maior diâmetro máximo da amostra histológica (1,51±1,3 mm vs. 0,94±0,55 mm, p=0,032) que a agulha 22G. O sucesso técnico, dificuldade de punção e sangramento da amostra foram semelhantes entre os grupos. A sensibilidade, especificidade e acurácia diagnóstica foram 88,9%, 100% e 90% e 77,8%, 100% e 78,9% para as agulhas 20G e 22G, respectivamente. Conclusão: As amostras obtidas com a FNB 20G apresentaram melhores parâmetros histológicos, embora não tenha havido diferença no desempenho diagnóstico entre as duas agulhas.

On-site stereomicroscope quality evaluations to estimate white core cutoff lengths using EUS-FNA biopsy sampling with 22-gauge needles.

BACKGROUND AND AIMS: Although rapid on-site cytologic evaluation (ROSE) during EUS-guided FNA biopsy (EUS-FNAB) sampling may improve accuracy of pathologic analyses, cytopathologists are not widely available. We calculated the cutoff lengths required for accurate pathologic diagnoses from stereomicroscopically visible white cores (SVWCs) sampled using 22-gauge needles. METHODS: Overall, 118 patients with mediastinal or upper abdominal solid masses requiring pathologic diagnoses were included. EUS-FNAB sampling was performed using 22-gauge needles. SVWCs were isolated and measured using stereomicroscopy, and the utility of calculated cutoff lengths in diagnosis was investigated. RESULTS: The procedure success and SVWC sampling rates were both 100%, and the median SVWC length was 10 mm. Pathologic examination identified 75, 31, and 12 patients with pancreatic neoplasms (PNs), subepithelial lesions (SELs), and other lesions, respectively. The sensitivity, specificity, positive predictive value, negative predictive value, and accuracy for diagnosing malignancy using EUS-FNAB sampling were 93.1%, 100%, 100%, 69.6%, and 94%, respectively. The final diagnostic accuracy in the entire cohort, PNs, and SELs was 92.4%, 90.7%, and 93.5%, respectively. Receiver operating characteristic curves demonstrated the overall SVWC cutoff length to be 11 mm (11 mm for PNs, 3.5 mm for SELs). The overall sensitivity according to SVWC cutoff length was 91.4% (87.6% for PNs, 98.8% for SELs). Compared with cutoff length, multivariate analysis confirmed SVWC length to be a stronger independent factor for tissue diagnosis in both groups. CONCLUSIONS: Diagnosis improved significantly with SVWC cutoff lengths ≥11 mm. This may be a useful index for endoscopists, particularly where ROSE is unavailable. (Clinical trial registration number: UMIN000023013.).

Systematized protocol for interventional pathology reports. Pathology report paradigm for pathologist-performed Ultrasound Guided Fine Needle Aspiration (USFNA) and Ultrasound Guided Core Needle Biopsy (USCNB) / Protocolo sistematizado para informes de patología intervencionista. Informe de anatomía patológica para punción-aspiración con aguja fina con ecografía (EcoPAAF) y biopsia con aguja gruesa con ecografía (EcoBAG)

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Diagnostic cytological features and differential diagnosis of subacute granulomatous (De Quervain's) thyroiditis.

BACKGROUND: The aims of the study are to identify the diagnostic cytological features of subacute granulomatous thyroiditis (SGT), to compare our results with previous literature studies, and to investigate the cytological changes in SGT that mimic other thyroid lesions. METHODS: This retrospective study was conducted with 69 cases. The cytology slides were re-evaluated. The diagnostic cytomorphological features of the disease were identified. The results were compared with the literature. Differential diagnosis of the disease is discussed with the results obtained. RESULTS: The diagnostic cytological features consisted of lymphocytes, multinucleated giant cells, loose epithelioid histiocyte groups, granulomas, isolated epithelioid histiocytes, colloid, and neutrophil leukocytes. The highest degree of concordance between our results and the published literature was the presence of giant cells while the lowest was for microfollicles. Some reactive cytological features of SGT were similar to other benign or malignant diseases of the thyroid. CONCLUSION: SGT is a rare and self-limiting disease. Cytological features are not specific. The diagnosis should be confirmed by clinical and laboratory results. Reactive atypia in the early phase of the disease and microfollicles in the late phase may lead to a false cytological diagnosis, thus resulting in unnecessary resection. To prevent such misdiagnoses, cytopathologists should be aware of the reactive cytological changes in this disorder.

Fine-needle aspiration of adrenal lesions: A 20-year single institution experience with comparison of percutaneous and endoscopic ultrasound guided approaches.

BACKGROUND: Historically, sampling of adrenal lesions has been performed by percutaneous image-guided fine-needle aspiration (FNA) biopsy. Endoscopic ultrasound guided (EUS)-FNA of the adrenals was first employed at Cleveland Clinic ~10 years ago. We report a two-decade experience of adrenal FNA in our institution. METHODS: An electronic retrieval identified adrenal FNAs from 1997 to 2017. Data points from each case (diagnosis, method of FNA, age, sex, laterality, needle gauge, size of lesion, adequacy of sample, and histologic follow up) were analyzed. RESULTS: Our retrieval confirmed 198 adrenal FNAs performed over 20 years. Of these, 90% (179/198) were percutaneous, and the remaining 10% (19/198) were collected by EUS. Of the 179 CT guided FNAs, 93% (162/179) yielded an adequate specimen as compared with an adequacy rate of 89% (17/19) for EUS-FNAs, with no significant difference in adequacy rates by collection method, P = .64 (Fisher's exact). Of all adrenal FNAs, 53% (105/198) confirmed metastases, 33% (65/198) showed adrenal cells or primary adrenal neoplasms (85% cortical cells, 14% cortical neoplasia, 1% pheochromocytoma), 8% were inadequate (15/198), 3% were atypical (7/198), and 2% were suspicious for malignancy (5/198). CONCLUSION: FNA of the adrenal glands can be useful in the diagnosis and staging of metastatic neoplasms, as well as in distinguishing primary adrenal cortical from medullary neoplasms and characterizing hematolymphoid and mesenchymal neoplasms. Overall adequacy rates for adrenal cytology are high (92%) with no statistically significant difference between CT-guided (93%) and EUS-FNA adequacy (89%). The majority of our procedures confirmed metastases, sparing patients unnecessary surgery.

The presence of multinucleated giant cells: Noninvasive follicular thyroid neoplasm with papillary-like nuclear features vs the follicular variant of papillary thyroid carcinoma.

BACKGROUND: Noninvasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTP) is a newly described entity with an indolent clinical course as compared to the follicular variant of papillary thyroid carcinoma (FVPTC). As the cytologic features of NIFTP overlap those of the FVPTC, distinction between the two on FNA cytology poses diagnostic difficulties. This study analyzes the presence of multinucleated giant cells (MGCs). METHODS: Twenty histologically confirmed NIFTP cases and 17 FVPTC cases each with a prior FNA and performed over a 2-year period were reviewed, the cytologic diagnoses compared and the number of MGCs counted. RESULTS: Of the 20 NIFTP cases, 55% were diagnoses as FLUS on FNA, 25% as FN/SFN and 10% as SPTC. Of the 17 FVPTC cases, 12% were diagnosed as FLUS, 53% as FN/SFN and 35% as SPTC. Fifteen (88%) FVTPC cases contained MGCs, whereas none of the 20 NIFTP cases contained MGCs. CONCLUSION: The presence or absence of MGCs may serve as an additional finding to differentiate NIFTP cases from FVTPC cases.

Improving ROSE: Discrepant touch preparation and histology findings in cytology of renal masses: A 10-year retrospective review.

BACKGROUND: The number of "renal incidentalomas" is on the rise due to increasing use of radiologic studies. Image-guided core needle biopsies (CNB) with touch preparations are performed to guide specimen collection and triage of sample for additional studies. Results allow the clinical team to make appropriate treatment decisions. DESIGN: Our electronic database was searched for a 10-year period to identify 180 image-guided biopsies of renal masses with rapid on-site evaluations (ROSE) and corresponding biopsy/resection specimens. Touch preparations were classified as non-diagnostic, negative/benign, adequate/positive for malignancy/oncocytic predominance, or atypical. These results were compared to the final diagnosis on the biopsy or resection specimen (if available). Diagnostic accuracy, sensitivity, specificity, and positive and negative predictive values were determined. Non-diagnostic cases and cases in which ROSE and final diagnosis were discordant were reviewed by cytopathologists blinded to the original interpretation to reconcile discrepancies and highlight interpretation pitfalls. RESULTS: A ROSE diagnosis was rendered in 133 of 180 cases; 47 cases were non-diagnostic. Of the 133 diagnostic cases, the ROSE diagnosis was concordant with the core biopsy final diagnosis in 125 cases, yielding a diagnostic accuracy of 94%. The overall sensitivity was calculated to be 80.1%; specificity 72.4%; positive predictive value 94%; and negative predictive value 41.2%. CONCLUSIONS: Touch preparation slides are vital but imperfect tools in evaluating renal masses. In our study, distinction between malignant and benign samples was accomplished in most cases (94% accuracy), but there are limitations. Awareness of interpretation pitfalls allows informed decisions to be made regarding specimen collection and patient management.

Risk of malignancy in the categories of the Papanicolaou Society of Cytopathology system for reporting pancreaticobiliary cytology.

BACKGROUND: Management of pancreatic lesions depends on the risk of malignancy, which is primarily determined from the cytologic and radiologic evaluation findings. The Papanicolaou Society of Cytopathology (PSC) published a classification system for reporting pancreaticobiliary cytology. However, the "neoplastic: other" category can be further stratified by high-grade atypia (HGA). Studies on the risk of malignancy using the PSC system have been limited. MATERIALS AND METHODS: All patients who had undergone endoscopic ultrasound-guided fine-needle aspiration (FNA) for a pancreatic lesion at Massachusetts General Hospital from January 2016 to December 2016 were prospectively classified. The clinical, radiographic, and endoscopic findings, cytologic and histologic diagnoses, and follow-up data from 334 FNA biopsies from 322 patients were reviewed. The neoplastic: other category was subclassified as low-grade atypia or HGA. The absolute risk of malignancy was determined by the histologic outcome or follow-up of ≥6 months. RESULTS: The absolute risk of malignancy was 7.7% for the nondiagnostic category; 1.0% for negative; 28.0% for atypical; 0.0% for neoplastic: benign; 30.3% for neoplastic: other; 90.0% for neoplastic: other with HGA; 100% for suspicious; and 100% for positive. When the neoplastic: other with HGA, suspicious, and positive cytologic diagnoses were considered positive, the sensitivity, specificity, positive predictive value, and negative predictive value for pancreatic FNA biopsy was 92.2%, 98.8%, 98.3%, and 94.3%, respectively. CONCLUSIONS: Categories of the PSC system each carry an implied absolute risk of malignancy, increasing from the negative to positive categories. The presence of HGA identifies lesions at the greatest risk of malignancy in the neoplastic: other category, and its inclusion with suspicious and positive as positive diagnoses optimizes the diagnostic performance of identifying high-risk lesions that warrant surgical excision.

Fine-needle aspiration cytology and cell block in diagnosis and subtyping of hepatoblastoma.

Hepatoblastoma (HB) constitutes less than 1% of all pediatric malignancies and is the most common malignant tumor of liver in children. The fine-needle aspiration cytological (FNAC) diagnosis and sub-typing of this tumor is challenging, which is of critical importance from its treatment point of view. All cases with a clinicoradiological impression of "HB" during the study period of 1 year were subjected to ultrasound-guided (USG) FNAC and cell blocks were prepared in all cases. Detailed cytopathological examination was carried out based on the cytomorphological pattern and the cell blocks were used to correlate the findings and the final diagnoses were confirmed with the histopathological findings. Four cases were included during this study period. All were children, whose age ranged from 3 months to 10 years. All of them presented with mass per abdomen and increased serum alfa-feto protein (AFP) levels. On a detailed cytological examination, the clinical impression of HB was confirmed in all four cases with a subsequent histological correlation. Based on their distinct cytomorphological pattern, three of them were accurately sub-typed as"fetal type," wile the fourth was an "embryonal type of HB." All four cases had the evidence of extramedullary hematopoeisis. We conclude that a precise preoperative FNAC diagnosis with accurate sub-typing of HB is possible purely on cytomorphologic basis which has prognostic and therapeutic implications. Cell blocks are of great use for ancillary studies. Extramedullary hematopoiesis serves as an important "clue" in diagnosis.