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Wilkinson MJ, Snow H, Downey K, Thomas K, Riddell A, Francis N, Strauss DC, Hayes AJ, Smith MJF, Messiou C. CT diagnosis of ilioinguinal lymph node metastases in melanoma using radiological characteristics beyond size and asymmetry. BJS Open 2021; 5:6104886. [PMID: 33609385 PMCID: PMC7893466 DOI: 10.1093/bjsopen/zraa005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 08/27/2020] [Indexed: 11/23/2022] Open
Abstract
Background Diagnosis of lymph node (LN) metastasis in melanoma with non-invasive methods is challenging. The aim of this study was to evaluate the diagnostic accuracy of six LN characteristics on CT in detecting melanoma-positive ilioinguinal LN metastases, and to determine whether inguinal LN characteristics can predict pelvic LN involvement. Methods This was a single-centre retrospective study of patients with melanoma LN metastases at a tertiary cancer centre between 2008 and 2016. Patients who had preoperative contrast-enhanced CT assessment and ilioinguinal LN dissection were included. CT scans containing significant artefacts obscuring the pelvis were excluded. CT scans were reanalysed for six LN characteristics (extracapsular spread (ECS), minimum axis (MA), absence of fatty hilum (FH), asymmetrical cortical nodule (CAN), abnormal contrast enhancement (ACE) and rounded morphology (RM)) and compared with postoperative histopathological findings. Results A total of 90 patients were included. Median age was 58 (range 23–85) years. Eighty-eight patients (98 per cent) had pathology-positive inguinal disease and, of these, 45 (51 per cent) had concurrent pelvic disease. The most common CT characteristics found in pathology-positive inguinal LNs were MA greater than 10 mm (97 per cent), ACE (80 per cent), ECS (38 per cent) and absence of RM (38 per cent). In multivariable analysis, inguinal LN characteristics on CT indicative of pelvic disease were RM (odds ratio (OR) 3.3, 95 per cent c.i. 1.2 to 8.7) and ECS (OR 4.2, 1.6 to 11.3). Cloquet’s node is known to be a poor predictor of pelvic spread. Pelvic LN disease was present in 50 per cent patients, but only 7 per cent had a pathology-positive Cloquet’s node. Conclusion Additional CT radiological characteristics, especially ECS and RM, may improve diagnostic accuracy and aid clinical decisions regarding the need for inguinal or ilioinguinal dissection.
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Affiliation(s)
- M J Wilkinson
- Department of Academic Surgery, Sarcoma and Melanoma Unit, The Royal Marsden Hospital, London, UK
| | - H Snow
- Department of Academic Surgery, Sarcoma and Melanoma Unit, The Royal Marsden Hospital, London, UK
| | - K Downey
- Department of Radiology, The Royal Marsden Hospital, London, UK
| | - K Thomas
- Statistics Department, The Royal Marsden Hospital, London, UK
| | - A Riddell
- Department of Radiology, The Royal Marsden Hospital, London, UK
| | - N Francis
- Department of Pathology, The Royal Marsden Hospital (Honorary) and Charing Cross Hospital, London, UK
| | - D C Strauss
- Department of Academic Surgery, Sarcoma and Melanoma Unit, The Royal Marsden Hospital, London, UK
| | - A J Hayes
- Department of Academic Surgery, Sarcoma and Melanoma Unit, The Royal Marsden Hospital, London, UK.,Division of Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
| | - M J F Smith
- Department of Academic Surgery, Sarcoma and Melanoma Unit, The Royal Marsden Hospital, London, UK
| | - C Messiou
- Department of Radiology, The Royal Marsden Hospital, London, UK.,Division of Radiotherapy and Imaging, The Institute of Cancer Research, London, UK
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Schuitevoerder D, Leong SPL, Zager JS, White RL, Avisar E, Kosiorek H, Dueck A, Fortino J, Kashani-Sabet M, Hart K, Vetto JT. Is pelvic sentinel node biopsy necessary for lower extremity and trunk melanomas? Am J Surg 2017; 213:921-925. [PMID: 28411863 DOI: 10.1016/j.amjsurg.2017.03.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Revised: 01/17/2017] [Accepted: 03/21/2017] [Indexed: 11/16/2022]
Abstract
OBJECTIVE There is currently no consensus regarding how to address pelvic sentinel lymph nodes (PSLNs) in melanoma. Thus, our objectives were to identify the incidence and clinical impact of PSLNs. METHODS Retrospective review of a prospectively collected multi-institutional melanoma database. RESULTS Of 2476 cases of lower extremity and trunk melanomas, 227 (9%) drained to PSLNs (181 to both PSLNs and superficial (inguinal or femoral) sentinel lymph nodes (SSLN) and 46 to PSLNs alone). Seventeen (7.5%) of 227 PSLN cases were positive for nodal metastasis, 8 of which drained to PSLNs only while 9 drained to both PSLNs and SSLNs. Complication rates between PSLN and SSLN biopsy were similar (15% vs. 14% respectively). In 181 cases with drainage to both SSLNs and PSLNs, PSLN biopsy upstaged one patient (0.6%), and completion dissection based on a positive PSLN did not upstage any. CONCLUSIONS PSLN biopsy is safe, however in the setting of negative SSLNs there is minimal clinical impact. We therefore recommend PSLN biopsy when the SSLNs are positive or when the tumor drains to PSLNs alone.
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Affiliation(s)
| | - Stanley P L Leong
- Center for Melanoma Research and Treatment, Department of Surgery, California Pacific Medical Center, San Francisco, CA, USA
| | - Jonathan S Zager
- Departments of Cutaneous Oncology and Sarcoma, Moffitt Cancer Center, Tampa, FL, USA
| | - Richard L White
- Department of Surgery, Levine Cancer Institute, Carolinas Medical Center, Charlotte, NC, USA
| | - Eli Avisar
- Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Heidi Kosiorek
- Section of Biostatistics, Mayo Clinic Arizona, Phoenix, AZ, USA
| | - Amylou Dueck
- Section of Biostatistics, Mayo Clinic Arizona, Phoenix, AZ, USA
| | - Jeanine Fortino
- Department of Surgery, Division of Surgical Oncology, Oregon Health & Science University, Portland, OR, USA
| | - Mohammed Kashani-Sabet
- Center for Melanoma Research and Treatment, Department of Surgery, California Pacific Medical Center, San Francisco, CA, USA
| | - Kyle Hart
- Department of Surgery, Oregon Health & Science University, Portland, OR, USA
| | - John T Vetto
- Department of Surgery, Division of Surgical Oncology, Oregon Health & Science University, Portland, OR, USA
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