Liquid-based cytology (LBC) is a monolayer slide preparation technology that has outperformed conventional Pap smears because of improved fixation, decreased obscuring factors, and standardized cell transfer. In LBC, samples are collected by completely immersing the sampling device into the company vial containing preservative fluid, whereby the cells are preserved and fixed simultaneously unlike conventional smears where the sample is smeared onto the glass slide and fixed separately. To date, two major liquid-based preparation methods are known – ThinPrep and SurePath. These two methods are different in their principles of cell harvesting but produce similar preparations. SurePath works on the principle of density gradient sedimentation. In this, a sample is vortexed and strained to break the mucus and large cell groups and then is treated through a density gradient centrifugation process to remove blood and debris. The cell pellet is resuspended and is allowed to sediment onto a glass slide. This is followed by staining on the PrepStain instrument. Government Medical College and Hospital, Nagpur, India, uses the SurePath method which was approved by FDA in the USA in 1999. Our institution uses Rovers Cervex-Brush to collect the cells from the transformation zone. This chapter describes the principle of SurePath and the processing of cervicovaginal specimen using the fully automated system in the laboratory.
Background: Lung cancer is the commonest cancer mortality in the world. In targeted therapy era, precise cytohistological diagnosis is offered traditionally by FNAC, Cell Block (CB) and Core Needle Biopsy (CNB). However, little is known whether one technique is superior to other or all the three techniques complement each another. Therefore, this is a unique study as no other study has compared these techniques together till date. The objective of the study was to evaluate performance of FNAC, Cell block (CB) and Core Needle Biopsy (CNB) individually and comparing them with each other.Methods: This was a prospective study of 50 cases who underwent two passes-1st for FNAC smears and Cell Block and 2nd for CNB.Results: Material was Inadequate in 8 cases by FNAC 16 with Cell Block and 02 with CNB. When adequate, diagnosis and typing was possible by Cell Block (32) and CNB (48). In 08 FNAC cases having adequate material, cytological typing wasn’t possible. These 08 cases were typed by cell block as 07 malignant and 01 pre-malignant. The combined inadequate cases with cyto-technique (FNAC and Cell Block) were 04 compared to 02 cases on CNB. Combined sensitivity of Cyto-techniques was 95.4% compared to 97% on CNB. The specificity was 100% for both Cyto-techniques and CNB.Conclusions: Diagnostic adequacy and test parameters improved and approached CNB when both cyto-techniques are combined. So, we strongly recommend that Cell Block be made routine diagnostic procedure in all the government institutions especially for guided FNAC.
Objective:To assess the performance of fine needle aspiration cytology (FNAC) in the diagnosis of tuberculosis mastitis.Materials and Methods:Diagnostic test performance evaluation using two methods—as compared to an alloyed gold standard as well as in the absence of a gold standard. Alloyed gold standard combined the results of acid fast bacilli in cytology smears, histopathological confirmation, and response to treatment. Bayesian estimation of test parameters was done in the absence of the gold standard.Results:FNAC was carried out in 6,496 consecutive cases of breast lump and 104 cases of granulomatous mastitis were detected. Both methods of test parameter estimation identified a high specificity of FNAC for the diagnosis of tuberculosis mastitis (98.9% and 98.4%, respectively). Estimation of sensitivity was falsely high (100%) using the alloyed gold standard because of a workup bias and falsely low (8.41%) using the Bayesian estimation because of low prevalence. Likelihood ratios by both methods suggested that FNAC has good discriminatory capability.Conclusion:In situations where prevalence of tuberculosis is high and where facilities for histopathological evaluation do not exist, FNAC can offer an optional alternative to base the therapeutic decision for starting antitubercular treatment.
Introduction: Multiparameter Flowcytometry (MFC) is a high throughput, quick, and practical technique for diagnoses of Chronic Lymphoproliferative Disorders (CLPDs). Indian CLPDs cases have distinct distribution and presentation than the developed world. Moreover, limited studies have confirmed the diagnostic utility of MFC in Indian CLPDs cases. Aim: To evaluate the diagnostic utility of MFC in peripheral blood and bone marrow aspirate of CLPDs cases. Materials and Methods: This was a single centre, prospective, observational study involving clinico-morphologically suspected or diagnosed 85 CLPDs cases. It was carried out in the Department of Pathology, Government Medical College and Hospital, Nagpur, Maharashtra, India, from January 2016 to November 2019. The patients were followed up for peripheral smear (PS) and Bone Marrow(BM) MFC and staging in nodal or extranodal Non-Hodgkin’s Lymphoma was done. Results: Clinico-morphological examination led to the diagnosis of 74 CLPD cases, while remaining 11 cases were strongly suspected. MFC immunophenotyping was contributory in diagnosing 74 CLPD cases which on further subtyping consisted of B-cell CLPD (N=70), and T-cell CLPD (N=3), while one case of B-NHL could not be subtyped. The most common B-cell CLPD included multiple myeloma (n=27), chronic lymphocytic leukemia (n=25), diffuse large B-cell lymphoma (n=7). T-cell CLPD included hepatosplenic gamma delta T-cell lymphoma (N=2) and adult T-cell lymphoma, follicular lymphoma (n=3), burkitt’s lymphoma (n=2), mantle cell lymphoma (n=2), prolymphocytic leukemia (n=2), splenic marginal zonal lymphoma (n=2), B Cell Non-Hodgkin’s Lymphoma (n=1). Finally, 11 suspected cases mostly comprised of reactive lymphocytosis (81.8%). Conclusion: MFC immunophenotyping led to diagnoses and determination of CLPD sub-class. It also resulted in rapid diagnoses of reactive hyperplasia and non-hematolymphoid malignancy which may mimic CLPD on morphology and hence, difficult to diagnose based on morphology alone.
Clinical presentation of patients with multinodular goitre is variable. Fine-needle aspiration (FNA) has been widely accepted as an initial step in the management of thyroid nodules. However, the usefulness of FNA to assess the risk of malignancy in thyroid nodules occurring within a long standing multinodular goitre (MNG) has not been completely clarified. Moreover, an unresolved issue is whether MNG is significantly associated with malignancy. MNG had been traditionally thought to be at a low risk for malignancy as compared to a solitary thyroid nodule (STN). However, review of literature showed no statistical difference in incidence of malignancy in both MNG and solitary nodular goitre. The incidence of malignancy in multinodular goitres has been found to vary from 7.5% to 17%. The duration of the associated goitre varies and ranges from the shortest of one month to the longest of more than 20 years. Considering this background, we are reporting a series of three cases of thyroid malignancies diagnosed on FNAC in patients having long standing goitre.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2025 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.