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Nieuwenhuis ER, Mir N, Horstman-van de Loosdrecht MM, Meeuwis APW, de Bakker MGJ, Scheenen TWJ, Alic L. Performance of a Nonlinear Magnetic Handheld Probe for Intraoperative Sentinel Lymph Node Detection: A Phantom Study. Ann Surg Oncol 2023; 30:8735-8742. [PMID: 37661223 PMCID: PMC10625952 DOI: 10.1245/s10434-023-14166-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 07/09/2023] [Indexed: 09/05/2023]
Abstract
OBJECTIVE This study investigates the performance of the DiffMag handheld probe (nonlinear magnetometry), to be used for sentinel lymph node detection. Furthermore, the performance of DiffMag is compared with a gamma probe and a first-order magnetometer (Sentimag®, linear magnetometry). METHODS The performance of all three probes was evaluated based on longitudinal distance, transverse distance, and resolving power for two tracer volumes. A phantom was developed to investigate the performance of the probes for a clinically relevant situation in the floor of the mouth (FOM). RESULTS Considering the longitudinal distance, both DiffMag handheld and Sentimag® probe had comparable performance, while the gamma probe was able to detect at least a factor of 10 deeper. Transverse distances of 13, 11, and 51 mm were measured for the small tracer volume by the DiffMag handheld, Sentimag®, and the gamma probe, respectively. For the large tracer volume this was 21, 18, and 55 mm, respectively. The full width at half maximum, at 7 mm probe height from the phantom surface, was 14, 12, and 18 mm for the small tracer volume and 15, 18, and 25 mm for the large tracer volume with the DiffMag handheld, Sentimag®, and gamma probe, respectively. CONCLUSIONS With a high resolving power but limited longitudinal distance, the DiffMag handheld probe seems suitable for detecting SLNs which are in close proximity to the primary tumor. In this study, comparable results were shown using linear magnetometry. The gamma probe reached 10 times deeper, but has a lower resolving power compared with the DiffMag handheld probe.
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Affiliation(s)
- Eliane R Nieuwenhuis
- Magnetic Detection and Imaging Group, Technical Medical Centre, University of Twente, Enschede, The Netherlands
| | - Nida Mir
- Magnetic Detection and Imaging Group, Technical Medical Centre, University of Twente, Enschede, The Netherlands
| | | | - Antoi P W Meeuwis
- Department of Medical Imaging, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Maarten G J de Bakker
- Department of Medical Imaging, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Tom W J Scheenen
- Department of Medical Imaging, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Lejla Alic
- Magnetic Detection and Imaging Group, Technical Medical Centre, University of Twente, Enschede, The Netherlands.
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Yang G, Wei L, Thong BKS, Fu Y, Cheong IH, Kozlakidis Z, Li X, Wang H, Li X. A Systematic Review of Oral Biopsies, Sample Types, and Detection Techniques Applied in Relation to Oral Cancer Detection. BIOTECH 2022; 11:5. [PMID: 35822813 PMCID: PMC9245907 DOI: 10.3390/biotech11010005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 02/18/2022] [Accepted: 02/24/2022] [Indexed: 12/11/2022] Open
Abstract
Background: Early identification of the stage of oral cancer development can lead to better treatment outcomes and avoid malignant transformation. Therefore, this review aims to provide a comprehensive overview that describes the development of standardized procedures for oral sample collection, characterization, and molecular risk assessment. This can help investigators to choose the appropriate sampling method and downstream analyses for different purposes. Methods: This systematic review was conducted according to the PRISMA guidelines. Using both PubMed and Web of Science databases, four independent authors conducted a literature search between 15 and 21 June 2021. We used key search terms to broaden the search for studies. Non-conforming articles were removed using an EndNote-based and manual approach. Reviewers used a designed form to extract data. Results: This review included a total of 3574 records, after eliminating duplicate articles and excluding papers that did not meet the inclusion criteria. Finally, 202 articles were included in this review. We summarized the sampling methods, biopsy samples, and downstream analysis. The biopsy techniques were classified into tissue and liquid biopsy. The common sequential analysis of tissue biopsy includes histopathological examination such as H&E or IHC to identify various pathogenic features. Meanwhile, liquid samples such as saliva, blood, and urine are analyzed for the purpose of screening to detect mutations in cancer. Commonly used technologies are PCR, RT-PCR, high-throughput sequencing, and metabolomic analysis. Conclusions: Currently, tissue biopsies provide increased diagnostic value compared to liquid biopsy. However, the minimal invasiveness and convenience of liquid biopsy make it a suitable method for mass screening and eventual clinical adoption. The analysis of samples includes histological and molecular analysis. Metabolite analysis is rising but remains scarce.
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Affiliation(s)
- Guanghuan Yang
- State Key Laboratory of Oncogenes and Related Genes, Centre for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; (G.Y.); (L.W.); (B.K.S.T.); (Y.F.); (I.H.C.); (X.L.)
| | - Luqi Wei
- State Key Laboratory of Oncogenes and Related Genes, Centre for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; (G.Y.); (L.W.); (B.K.S.T.); (Y.F.); (I.H.C.); (X.L.)
| | - Benjamin K. S. Thong
- State Key Laboratory of Oncogenes and Related Genes, Centre for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; (G.Y.); (L.W.); (B.K.S.T.); (Y.F.); (I.H.C.); (X.L.)
| | - Yuanyuan Fu
- State Key Laboratory of Oncogenes and Related Genes, Centre for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; (G.Y.); (L.W.); (B.K.S.T.); (Y.F.); (I.H.C.); (X.L.)
| | - Io Hong Cheong
- State Key Laboratory of Oncogenes and Related Genes, Centre for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; (G.Y.); (L.W.); (B.K.S.T.); (Y.F.); (I.H.C.); (X.L.)
| | - Zisis Kozlakidis
- International Agency for Research on Cancer, World Health Organization, 69372 Lyon, France;
| | - Xue Li
- State Key Laboratory of Oncogenes and Related Genes, Centre for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; (G.Y.); (L.W.); (B.K.S.T.); (Y.F.); (I.H.C.); (X.L.)
| | - Hui Wang
- State Key Laboratory of Oncogenes and Related Genes, Centre for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; (G.Y.); (L.W.); (B.K.S.T.); (Y.F.); (I.H.C.); (X.L.)
| | - Xiaoguang Li
- State Key Laboratory of Oncogenes and Related Genes, Centre for Single-Cell Omics, School of Public Health, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; (G.Y.); (L.W.); (B.K.S.T.); (Y.F.); (I.H.C.); (X.L.)
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Nieuwenhuis ER, Kolenaar B, Hof JJ, van Baarlen J, van Bemmel AJM, Christenhusz A, Scheenen TWJ, ten Haken B, de Bree R, Alic L. A Comprehensive Grading System for a Magnetic Sentinel Lymph Node Biopsy Procedure in Head and Neck Cancer Patients. Cancers (Basel) 2022; 14:cancers14030678. [PMID: 35158946 PMCID: PMC8833366 DOI: 10.3390/cancers14030678] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/22/2022] [Accepted: 01/26/2022] [Indexed: 02/05/2023] Open
Abstract
Simple Summary With 30% of clinically negative early-stage oral cancer patients harboring occult metastasis, an accurate staging of metastatic lymph nodes (LN) is of utmost importance for treatment planning. A magnetic sentinel lymph node biopsy (SLNB) procedure is offered as an alternative to conventional SLNB in oral oncology, however, a grading system is missing. A proper grading system is preferred to connect the different components of the magnetic SLNB: preoperative imaging, intraoperative detection, and histopathological examination of sentinel lymph nodes (SLNs). This study aims to provide a first grading system based on the distribution of a magnetic tracer, by means of preoperative magnetic resonance imaging (MRI), intraoperative estimation of iron content, and histopathological assessment of resected nodes. Pre- and post-operative MRI and harvested SLNs of eight tongue cancer patients with successful magnetic SLNB procedure were used for analyses. Abstract A magnetic sentinel lymph node biopsy ((SLN)B) procedure has recently been shown feasible in oral cancer patients. However, a grading system is absent for proper identification and classification, and thus for clinical reporting. Based on data from eight complete magnetic SLNB procedures, we propose a provisional grading system. This grading system includes: (1) a qualitative five-point grading scale for MRI evaluation to describe iron uptake by LNs; (2) an ex vivo count of resected SLN with a magnetic probe to quantify iron amount; and (3) a qualitative five-point grading scale for histopathologic examination of excised magnetic SLNs. Most SLNs with iron uptake were identified and detected in level II. In this level, most variance in grading was seen for MRI and histopathology; MRI and medullar sinus were especially highly graded, and cortical sinus was mainly low graded. On average 82 ± 58 µg iron accumulated in harvested SLNs, and there were no significant differences in injected tracer dose (22.4 mg or 11.2 mg iron). In conclusion, a first step was taken in defining a comprehensive grading system to gain more insight into the lymphatic draining system during a magnetic SLNB procedure.
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Affiliation(s)
- Eliane R. Nieuwenhuis
- Magnetic Detection and Imaging Group, Technical Medical Centre, University of Twente, 7522 NB Enschede, The Netherlands; (E.R.N.); (A.C.); (B.t.H.)
- Department of Maxillofacial Surgery—Head and Neck Surgical Oncology, Medisch Spectrum Twente, 7512 KZ Enschede, The Netherlands;
| | - Barry Kolenaar
- Department of Maxillofacial Surgery—Head and Neck Surgical Oncology, Medisch Spectrum Twente, 7512 KZ Enschede, The Netherlands;
| | - Jurrit J. Hof
- Department of Radiology, Medisch Spectrum Twente, 7512 KZ Enschede, The Netherlands;
| | - Joop van Baarlen
- Laboratorium Pathologie Oost Nederland, 7555 BB Hengelo, The Netherlands;
| | - Alexander J. M. van Bemmel
- Department of Otorhinolaryngology—Head and Neck Surgical Oncology, Medisch Spectrum Twente, 7512 KZ Enschede, The Netherlands;
| | - Anke Christenhusz
- Magnetic Detection and Imaging Group, Technical Medical Centre, University of Twente, 7522 NB Enschede, The Netherlands; (E.R.N.); (A.C.); (B.t.H.)
- Department of Surgery, Medisch Spectrum Twente, 7512 KZ Enschede, The Netherlands
| | - Tom W. J. Scheenen
- Department of Medical Imaging, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands;
| | - Bernard ten Haken
- Magnetic Detection and Imaging Group, Technical Medical Centre, University of Twente, 7522 NB Enschede, The Netherlands; (E.R.N.); (A.C.); (B.t.H.)
| | - Remco de Bree
- Department of Head and Neck Surgical Oncology, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands;
| | - Lejla Alic
- Magnetic Detection and Imaging Group, Technical Medical Centre, University of Twente, 7522 NB Enschede, The Netherlands; (E.R.N.); (A.C.); (B.t.H.)
- Correspondence: ; Tel.: +31-534-898-731
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Methods for sentinel lymph node mapping in oral cancer: a literature review. POSTEP HIG MED DOSW 2022. [DOI: 10.2478/ahem-2022-0029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstract
Oral cancers, excluding non-melanoma skin cancer, are the most common cancers of the head and neck. Of these, 90% are squamous cell carcinomas (SCC). Surgery, which consists of dissection of the primary tumor and lymphadenectomy, is considered a radical method of treatment. There are several ranges of cervical lymphadenectomy: selective neck dissection (SND), modified radical neck dissection (MRND), and radical neck dissection (RND). The extension of surgery depends on the stage of clinical advancement, which can be determined by TNM classification, among other methods. The greatest controversy is related to SND in patients with cN0 (no evidence of regional lymph node metastasis), which is currently standard procedure. This approach is dictated by the possibility of hidden or subclinical metastases. The use of the sentinel lymph node (SLN) concept in patients with early stage of oral cancer and appropriate methods of its mapping may lead to a reduction in the extent of the lymphadenectomy procedure, thus reducing postoperative mortality and maintaining the patient’s function and quality of life, with correct oncological results. So far, available methods for SLN mapping are based on use of markers: methylene blue dye (MBD), metastable radioactive isotope Technetium (99mTc), or the fluorescent substance indocyanine green (ICG).
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Engels S, Michalik B, Meyer LM, Nemitz L, Wawroschek F, Winter A. Magnetometer-Guided Sentinel Lymph Node Dissection in Prostate Cancer: Rate of Lymph Node Involvement Compared with Radioisotope Marking. Cancers (Basel) 2021; 13:cancers13225821. [PMID: 34830975 PMCID: PMC8616036 DOI: 10.3390/cancers13225821] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 11/16/2021] [Accepted: 11/17/2021] [Indexed: 11/18/2022] Open
Abstract
Simple Summary Pelvic lymph node dissection is recommended in prostate cancer according to the patients’ individual risk for nodal metastases. Targeted removal of sentinel lymph nodes increases the number of detected lymph node metastases in patients with prostate cancer. We previously established magnetometer-guided sentinel lymph node dissection in patients with prostate cancer to overcome logistical and technical disadvantages associated with the standard radioisotope-guided technique. This retrospective study compared the magnetometer-guided and standard techniques in terms of their ability to detect lymph node metastases. Using the magnetometer-guided technique, more sentinel lymph nodes were detected per patient. The detected rates of lymph node involvement matched the predictions in both techniques equally well. Our findings confirm the reliability of magnetometer-guided sentinel lymph node dissection and highlight the importance of the sentinel technique for detecting lymph node metastases in prostate cancer. Abstract Sentinel pelvic lymph node dissection (sPLND) enables the targeted removal of lymph nodes (LNs) bearing the highest metastasis risk. In prostate cancer (PCa), sPLND alone or combined with extended PLND (ePLND) reveals more LN metastases along with detecting sentinel LNs (SLNs) outside the conventional ePLND template. To overcome the disadvantages of radioisotope-guided sPLND in PCa treatment, magnetometer-guided sPLND applying superparamagnetic iron oxide nanoparticles as a tracer was established. This retrospective study compared the nodal staging ability between magnetometer- and radioisotope-guided sPLNDs. We analyzed data of PCa patients undergoing radical prostatectomy and magnetometer- (848 patients, 2015–2021) or radioisotope-guided (2092 patients, 2006–2015) sPLND. To reduce heterogeneity among cohorts, we performed propensity score matching and compared data considering sentinel nomogram-based probabilities for LN involvement (LNI). Magnetometer- and radioisotope-guided sPLNDs had SLN detection rates of 98.12% and 98.09%, respectively; the former detected more SLNs per patient. The LNI rates matched nomogram-based predictions in both techniques equally well. Approximately 7% of LN metastases were detected outside the conventional ePLND template. Thus, we confirmed the reliability of magnetometer-guided sPLND in nodal staging, with results comparable with or better than radioisotope-guided sPLND. Our findings highlight the importance of the sentinel technique for detecting LN metastases in PCa.
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Nieuwenhuis ER, Kolenaar B, van Bemmel AJM, Hof JJ, van Baarlen J, Christenhusz A, Pouw JJ, Ten Haken B, Alic L, de Bree R. A complete magnetic sentinel lymph node biopsy procedure in oral cancer patients: A pilot study. Oral Oncol 2021; 121:105464. [PMID: 34329868 DOI: 10.1016/j.oraloncology.2021.105464] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 06/25/2021] [Accepted: 07/12/2021] [Indexed: 02/05/2023]
Abstract
OBJECTIVES To assess the feasibility and merits of a complete magnetic approach for a sentinel lymph node biopsy (SLNB) procedure in oral cancer patients. MATERIALS AND METHODS This study included ten oral cancer patients (stage cT1-T2N0M0) scheduled for elective neck dissection (END). Superparamagnetic iron oxide nanoparticles (SPIO) were administered peritumorally prior to surgery. A preoperative MRI was acquired to identify lymph nodes (LNs) with iron uptake. A magnetic detector was used to identify magnetic hotspots prior, during, and after the SLNB procedure. The resected sentinel LNs (SLNs) were evaluated using step-serial sectioning, and the neck dissection specimen was assessed by routine histopathological examination. A postoperative MRI was acquired to observe any residual iron. RESULTS Of ten primary tumors, eight were located in the tongue, one floor-of-mouth (FOM), and one tongue-FOM transition. SPIO injections were experienced as painful by nine patients, two of whom developed a tongue swelling. In eight patients, magnetic SLNs were successfully detected and excised during the magnetic SLNB procedure. During the END procedure, additional magnetic SLNs were identified in three patients. Histopathology confirmed iron deposits in sinuses of excised SLNs. Three SLNs were harboring metastases, of which one was identified only during the END procedure. The END specimens revealed no further metastases. CONCLUSION A complete magnetic SLNB procedure was successfully performed in eight of ten patients (80% success rate), therefore the procedure seems feasible. Recommendations for further investigation are made including: use of anesthetics, magnetic tracer volume, planning preoperative MRI, comparison to conventional technique and follow-up.
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Affiliation(s)
- Eliane R Nieuwenhuis
- Magnetic Detection and Imaging Group, Technical Medical Centre, University of Twente, Enschede, the Netherlands; Department of Maxillofacial Surgery - Head and Neck Surgical Oncology, Medisch Spectrum Twente, Enschede, the Netherlands
| | - Barry Kolenaar
- Department of Maxillofacial Surgery - Head and Neck Surgical Oncology, Medisch Spectrum Twente, Enschede, the Netherlands
| | - Alexander J M van Bemmel
- Department of Otorhinolaryngology - Head and Neck Surgical Oncology, Medisch Spectrum Twente, Enschede, the Netherlands
| | - Jurrit J Hof
- Department of Radiology, Medisch Spectrum Twente, Enschede, the Netherlands
| | - Joop van Baarlen
- Laboratorium Pathologie Oost Nederland, Hengelo, the Netherlands
| | - Anke Christenhusz
- Magnetic Detection and Imaging Group, Technical Medical Centre, University of Twente, Enschede, the Netherlands; Department of Surgery, Medisch Spectrum Twente, Enschede, the Netherlands
| | - Joost J Pouw
- Magnetic Detection and Imaging Group, Technical Medical Centre, University of Twente, Enschede, the Netherlands
| | - Bernard Ten Haken
- Magnetic Detection and Imaging Group, Technical Medical Centre, University of Twente, Enschede, the Netherlands
| | - Lejla Alic
- Magnetic Detection and Imaging Group, Technical Medical Centre, University of Twente, Enschede, the Netherlands.
| | - Remco de Bree
- Department of Head and Neck Surgical Oncology, University Medical Center Utrecht, Utrecht, the Netherlands
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Driessen DAJJ, Dijkema T, Weijs WLJ, Takes RP, Pegge SAH, Zámecnik P, van Engen-van Grunsven ACH, Scheenen TWJ, Kaanders JHAM. Novel Diagnostic Approaches for Assessment of the Clinically Negative Neck in Head and Neck Cancer Patients. Front Oncol 2021; 10:637513. [PMID: 33634033 PMCID: PMC7901951 DOI: 10.3389/fonc.2020.637513] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 12/21/2020] [Indexed: 02/06/2023] Open
Abstract
In head and neck cancer, the presence of nodal disease is a strong determinant of prognosis and treatment. Despite the use of modern multimodality diagnostic imaging, the prevalence of occult nodal metastases is relatively high. This is why in clinically node negative head and neck cancer the lymphatics are treated “electively” to eradicate subclinical tumor deposits. As a consequence, many true node negative patients undergo surgery or irradiation of the neck and suffer from the associated and unnecessary early and long-term morbidity. Safely tailoring head and neck cancer treatment to individual patients requires a more accurate pre-treatment assessment of nodal status. In this review, we discuss the potential of several innovative diagnostic approaches to guide customized management of the clinically negative neck in head and neck cancer patients.
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Affiliation(s)
- Daphne A J J Driessen
- Department of Radiation Oncology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Tim Dijkema
- Department of Radiation Oncology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Willem L J Weijs
- Department of Oral- and Maxillofacial Surgery and Head and Neck Surgery, Radboud University Medical Center, Nijmegen, Netherlands
| | - Robert P Takes
- Department of Otorhinolaryngology and Head and Neck Surgery, Radboud University Medical Center, Nijmegen, Netherlands
| | - Sjoert A H Pegge
- Department of Medical Imaging, Radboud University Medical Center, Nijmegen, Netherlands
| | - Patrik Zámecnik
- Department of Medical Imaging, Radboud University Medical Center, Nijmegen, Netherlands
| | | | - Tom W J Scheenen
- Department of Medical Imaging, Radboud University Medical Center, Nijmegen, Netherlands
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Mahieu R, de Maar JS, Nieuwenhuis ER, Deckers R, Moonen C, Alic L, ten Haken B, de Keizer B, de Bree R. New Developments in Imaging for Sentinel Lymph Node Biopsy in Early-Stage Oral Cavity Squamous Cell Carcinoma. Cancers (Basel) 2020; 12:cancers12103055. [PMID: 33092093 PMCID: PMC7589685 DOI: 10.3390/cancers12103055] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 10/03/2020] [Accepted: 10/15/2020] [Indexed: 12/18/2022] Open
Abstract
Sentinel lymph node biopsy (SLNB) is a diagnostic staging procedure that aims to identify the first draining lymph node(s) from the primary tumor, the sentinel lymph nodes (SLN), as their histopathological status reflects the histopathological status of the rest of the nodal basin. The routine SLNB procedure consists of peritumoral injections with a technetium-99m [99mTc]-labelled radiotracer followed by lymphoscintigraphy and SPECT-CT imaging. Based on these imaging results, the identified SLNs are marked for surgical extirpation and are subjected to histopathological assessment. The routine SLNB procedure has proven to reliably stage the clinically negative neck in early-stage oral squamous cell carcinoma (OSCC). However, an infamous limitation arises in situations where SLNs are located in close vicinity of the tracer injection site. In these cases, the hotspot of the injection site can hide adjacent SLNs and hamper the discrimination between tracer injection site and SLNs (shine-through phenomenon). Therefore, technical developments are needed to bring the diagnostic accuracy of SLNB for early-stage OSCC to a higher level. This review evaluates novel SLNB imaging techniques for early-stage OSCC: MR lymphography, CT lymphography, PET lymphoscintigraphy and contrast-enhanced lymphosonography. Furthermore, their reported diagnostic accuracy is described and their relative merits, disadvantages and potential applications are outlined.
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Affiliation(s)
- Rutger Mahieu
- Department of Head and Neck Surgical Oncology, University Medical Center Utrecht, University of Utrecht, 3584 CX Utrecht, The Netherlands;
| | - Josanne S. de Maar
- Division of Imaging and Oncology, University Medical Center Utrecht, University of Utrecht, 3584 CX Utrecht, The Netherlands; (J.S.d.M.); (R.D.); (C.M.)
| | - Eliane R. Nieuwenhuis
- Department of Magnetic Detection & Imaging, University of Twente, 7522 NB Enschede, The Netherlands; (E.R.N.); (L.A.); (B.t.H.)
| | - Roel Deckers
- Division of Imaging and Oncology, University Medical Center Utrecht, University of Utrecht, 3584 CX Utrecht, The Netherlands; (J.S.d.M.); (R.D.); (C.M.)
| | - Chrit Moonen
- Division of Imaging and Oncology, University Medical Center Utrecht, University of Utrecht, 3584 CX Utrecht, The Netherlands; (J.S.d.M.); (R.D.); (C.M.)
| | - Lejla Alic
- Department of Magnetic Detection & Imaging, University of Twente, 7522 NB Enschede, The Netherlands; (E.R.N.); (L.A.); (B.t.H.)
| | - Bennie ten Haken
- Department of Magnetic Detection & Imaging, University of Twente, 7522 NB Enschede, The Netherlands; (E.R.N.); (L.A.); (B.t.H.)
| | - Bart de Keizer
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands;
| | - Remco de Bree
- Department of Head and Neck Surgical Oncology, University Medical Center Utrecht, University of Utrecht, 3584 CX Utrecht, The Netherlands;
- Correspondence: ; Tel.: +31-88-7550819
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