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Abe H, Kawahara A, Akiba J, Yamaguchi R. Advances in diagnostic liquid-based cytology. Cytopathology 2024. [PMID: 38837293 DOI: 10.1111/cyt.13405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 05/09/2024] [Accepted: 05/20/2024] [Indexed: 06/07/2024]
Abstract
Liquid-based cytology (LBC) has changed the landscape of gynaecological cytology. A growing demand exists for LBC in diagnostic cytology, particularly for ancillary testing, such as immunocytochemistry and molecular testing. Ancillary testing solely based on conventional preparation (CP) methods remains challenging. Recently, the increased demand for specialist testing and minimally invasive techniques, such as endoscopic ultrasonography fine-needle aspiration, to obtain cellular samples has led to an increasing demand for ancillary testing on cytology LBC supernatant, slides and cell block (CB). This facilitates the diagnosis and prognosis in cytology samples enabling personalized treatment. An understanding of the history and future prospects of LBC is crucial for its application in routine diagnostics by cytopathologists and cytotechnologists. In this review, we initiated an internet search using the keyword 'liquid-based cytology', and we conducted a literature review to discuss the usefulness of combined diagnosis of LBC and CP, immunocytochemistry and molecular testing and assessed the quality of nucleic acids in diagnostic LBC. High-quality and cell-rich diagnostic LBC surpassed the CP method alone in terms of reliability and versatility of ancillary testing in cytological diagnosis. Conclusively, diagnostic LBC lends itself to various new technologies and is expected to continue evolving with innovations in the future.
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Affiliation(s)
- Hideyuki Abe
- Department of Diagnostic Pathology, Kurume University Hospital, Kurume, Japan
| | - Akihiko Kawahara
- Department of Diagnostic Pathology, Kurume University Hospital, Kurume, Japan
| | - Jun Akiba
- Department of Diagnostic Pathology, Kurume University Hospital, Kurume, Japan
| | - Rin Yamaguchi
- Department of Diagnostic Pathology, Nagasaki University Hospital, Nagasaki, Japan
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Chen CN, Yang TL. Histology-based and cytology-based needle sampling for targeted next-generation sequencing in the indeterminate thyroid tumors. Eur Arch Otorhinolaryngol 2023:10.1007/s00405-023-07947-5. [PMID: 37097467 DOI: 10.1007/s00405-023-07947-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Accepted: 03/27/2023] [Indexed: 04/26/2023]
Abstract
PURPOSE To establish the optimal and minimally invasive diagnostic approach for targeted next-generation sequencing (NGS) in the indeterminate thyroid tumors. METHODS The patients with indeterminate thyroid tumors were prospectively recruited and analyzed in a single tertiary medical center. We performed FNA and core needle biopsy (CNB) at the surgical specimens to confirm the quality of each sampling procedure. Cytological diagnosis by FNA, histological diagnosis by CNB and confirmed diagnosis by final surgery were compared to demonstrate the agreement among these approaches for the indeterminate thyroid tumors. The quality of the samples from FNA and CNB was evaluated, respectively to determine the optimal approach for targeted NGS. Finally, we performed ultrasound-guided CNB and FNA (US-CNB and US-FNA) on one case to confirm the clinical feasibility of being a pre-operative minimally invasive diagnostic approach. RESULTS A total of 6 female patients (average age: 50.83 ± 15.18 years) with indeterminate thyroid tumors (average size: 1.79 ± 0.91 cm) were recruited for further analyses. The pathological diagnoses could be obtained by CNB in the first five cases, and the sample quality of CNB for targeted NGS was better than that of FNA, even after 10X dilution. The gene mutations associated with thyroid malignancy could be detected by NGS. In the case treated with US-CNB, the pathological and targeted NGS results were successfully obtained, which suggested the possibility of thyroid malignancy to facilitate immediate decision of subsequent treatment. CONCLUSION CNB could serve as a minimally invasive diagnostic approach in the indeterminate thyroid tumors by providing pathological diagnoses and qualified samples for detection of mutated genes, which facilitates appropriate and immediate management.
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Affiliation(s)
- Chun-Nan Chen
- Department of Otolaryngology, National Taiwan University Hospital and National Taiwan University College of Medicine, #1, Sec. 1 Jen-Ai Road, Taipei, 100, Taiwan
| | - Tsung-Lin Yang
- Department of Otolaryngology, National Taiwan University Hospital and National Taiwan University College of Medicine, #1, Sec. 1 Jen-Ai Road, Taipei, 100, Taiwan.
- Graduate Institute of Clinical Medicine, National Taiwan University College of Medicine, Taipei, Taiwan.
- Research Center for Developmental Biology and Regenerative Medicine, National Taiwan University, Taipei, Taiwan.
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Morii E, Hatanaka Y, Motoi N, Kawahara A, Hamakawa S, Kuwata T, Nagatomo T, Oda Y, Okamoto A, Tanaka R, Iyoda A, Ichiro M, Matsuo Y, Nakamura N, Nakai T, Fukuhara M, Tokita K, Yamaguchi T, Takenaka M, Kawabata A, Hatanaka KC, Tsubame K, Satoh Y. Guidelines for Handling of Cytological Specimens in Cancer Genomic Medicine. Pathobiology 2023; 90:289-311. [PMID: 36754025 PMCID: PMC10627493 DOI: 10.1159/000528346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 11/22/2022] [Indexed: 02/10/2023] Open
Abstract
Rapid advances are being made in cancer drug therapy. Since molecularly targeted therapy has been introduced, personalized medicine is being practiced, pathological tissue from malignant tumors obtained during routine practice is frequently used for genomic testing. Whereas cytological specimens fixed mainly in alcohol are considered to be more advantageous in terms of preservation of the nucleic acid quality and quantity. This article is aimed to share the information for the proper handling of cytological specimens in practice for genomic medicine based on the findings established in "Guidelines for Handling of Cytological Specimens in Cancer Genomic Medicine (in Japanese)" published by the Japanese Society of Clinical Cytology in 2021. The three-part practical guidelines are based on empirical data analyses; Part 1 describes general remarks on the use of cytological specimens in cancer genomic medicine, then Part 2 describes proper handling of cytological specimens, and Part 3 describes the empirical data related to handling of cytological specimens. The guidelines indicated proper handling of specimens in each fixation, preparation, and evaluation.
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Affiliation(s)
- Eiichi Morii
- Department of Pathology, Osaka University, Suita, Japan
| | - Yutaka Hatanaka
- Research Division of Genome Companion Diagnostics, Hokkaido University Hospital, Sapporo, Japan
| | - Noriko Motoi
- Department of Pathology, Saitama Cancer Center, Saitama, Japan
| | - Akihiko Kawahara
- Department of Diagnostic Pathology, Kurume University Hospital, Kurume, Japan
| | | | - Takeshi Kuwata
- Department of Genetic Medicine, National Cancer Center Hospital East, Kashiwa, Japan
| | | | - Yoshinao Oda
- Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Aikou Okamoto
- Department of Obstetrics and Gynecology, The Jikei University School of Medicine, Tokyo, Japan
| | - Ryota Tanaka
- Department of Surgery, Kyorin University School of Medicine, Mitaka, Japan
| | - Akira Iyoda
- Division of Chest Surgery, Department of Surgery, Toho University School of Medicine, Tokyo, Japan
| | - Maeda Ichiro
- Department of Diagnostic Pathology, Kitasato University Kitasato Institute Hospital, Tokyo, Japan
| | - Yukiko Matsuo
- Department of Thoracic Surgery, Kitasato University School of Medicine, Sagamihara, Japan
| | - Nobuyuki Nakamura
- Department of Clinical Laboratories, National Cancer Center Hospital East, Kashiwa, Japan
| | - Tokiko Nakai
- Department of Diagnostic Pathology, Harima-Himeji General Medical Center, Himeji, Japan
| | - Mei Fukuhara
- Department of Diagnostic Pathology, National Cancer Center Hospital, Tokyo, Japan
| | - Kazuya Tokita
- Department of Diagnostic Pathology, National Cancer Center Hospital, Tokyo, Japan
| | - Tomohiko Yamaguchi
- Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masataka Takenaka
- Department of Obstetrics and Gynecology, The Jikei University School of Medicine, Tokyo, Japan
| | - Ayako Kawabata
- Department of Obstetrics and Gynecology, The Jikei University School of Medicine, Tokyo, Japan
| | - Kanako C. Hatanaka
- Center for Development of Advanced Diagnostics, Hokkaido University Hospital, Sapporo, Japan
| | - Kaho Tsubame
- Center for Development of Advanced Diagnostics, Hokkaido University Hospital, Sapporo, Japan
| | - Yukitoshi Satoh
- Department of Thoracic Surgery, Kitasato University School of Medicine, Sagamihara, Japan
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Kanayama K, Izuhara J. Impact of LBC fixative type and fixation time on molecular analysis of pancreatic cancer cells: A comparative study of cell morphology, antigenicity and nucleic acids. J Cytol 2022; 39:66-71. [PMID: 35814881 PMCID: PMC9261998 DOI: 10.4103/joc.joc_13_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 04/20/2022] [Indexed: 11/04/2022] Open
Abstract
Introduction: Liquid-based cytology (LBC) has been widely used since 2000. Next-Generation Sequencing (NGS) analysis of residual specimens in LBC fixative may also be performed for pancreatic cancer in the near future. We examined cell morphology, antigenicity and nucleic acids in pancreatic cancer cells at different fixation times using two types of LBC fixatives. Methods: PANC-1 cells were fixed in 1 ml CytoRich Red (CR), CytoRich Blue (CB), 95% ethanol (95% AL) or 10% neutral buffered formalin (10% NBF) and evaluated for cell area, antigenicity and nucleic acids with fixation times of 1 hour and 1, 3, 9, and 14 days. Antigenicity was evaluated by immunocytochemical staining for p53 and CK20, and nucleic acid fragmentation was assessed by real-time PCR. Results: There was no difference in total cell area between 1 hour and 14 day fixation times for the CR group, but the CB group showed cell contraction with 9 days fixation. In immunocytochemical staining, the CR group showed high p53 and CK20 positivity even after 14 days fixation. The CB group had a lower p53 positive rate than the CR group from 1 hour fixation. For nucleic acid fragmentation, Ct values for the CR group increased with fixation time. The CB group had consistently low Ct values. Conclusion: Different LBC fixatives and fixation time can have varying effects on cell morphology, antigenicity and nucleic acids in pancreatic cancer cells. Therefore, fixative type and fixation time should be considered for molecular testing on residual samples in LBC fixatives.
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