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Yan N, Sugihara F, Hayashi N, Sasaki T, Ishii Y, Hayashi H, Kumita SI. Pulmonary mediastinal actinomycosis with "pound cake sign" on magnetic resonance imaging mimicking an infiltrative malignant tumor: A case report. Radiol Case Rep 2024; 19:3334-3338. [PMID: 38860267 PMCID: PMC11163146 DOI: 10.1016/j.radcr.2024.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 04/28/2024] [Accepted: 05/01/2024] [Indexed: 06/12/2024] Open
Abstract
Actinomycosis is a rare chronic suppurative granulomatous disease. Surgical biopsy is often performed in patients with chest actinomycosis because malignancy is suspected in most cases. A 62-year-old man presented to our hospital with fever and exertional dyspnea that had persisted for several months. Contrast-enhanced computed tomography showed an irregularly shaped mass with contrast enhancement in the anterior mediastinum and consolidation in the left upper lung lobe contiguous with this mass, as well as multiple nodules in both lungs. The pulmonary artery trunk was stenotic and surrounded by the mass, and the right heart system was enlarged. Thoracoscopic biopsy was performed but failed to yield a diagnosis. Contrast-enhanced computed tomography after one month revealed an increased mass and worsening right heart strain. 18F-FDG (fluorodeoxyglucose) positron emission tomography/computed tomography and contrast-enhanced magnetic resonance imaging also suggested a malignant tumor, and an open chest biopsy was performed. No malignant cells were identified and actinomycetes were detected by histopathology and bacterial culture. The patient was treated with antibiotics, following which his contrast-enhanced computed tomography findings and general condition improved.
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Affiliation(s)
- Nahiro Yan
- Department of Radiology, Nippon Medical School, 1-1-5 Sendagi, Bunkyou-ku, Tokyo 113-8602, Japan
| | - Fumie Sugihara
- Department of Radiology, Nippon Medical School, 1-1-5 Sendagi, Bunkyou-ku, Tokyo 113-8602, Japan
| | - Nobuhiko Hayashi
- Department of Radiology, Nippon Medical School, 1-1-5 Sendagi, Bunkyou-ku, Tokyo 113-8602, Japan
| | - Takashi Sasaki
- Department of Cardiovascular Surgery, Nippon Medical School, 1-1-5 Sendagi, Bunkyou-ku, Tokyo 113-8602, Japan
| | - Yosuke Ishii
- Department of Cardiovascular Surgery, Nippon Medical School, 1-1-5 Sendagi, Bunkyou-ku, Tokyo 113-8602, Japan
| | - Hiromitsu Hayashi
- Department of Radiology, Nippon Medical School, 1-1-5 Sendagi, Bunkyou-ku, Tokyo 113-8602, Japan
| | - Shin-ichiro Kumita
- Department of Radiology, Nippon Medical School, 1-1-5 Sendagi, Bunkyou-ku, Tokyo 113-8602, Japan
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Basse C, Khalifa J, Thillays F, Le Pechoux C, Maury JM, Bonte PE, Coutte A, Pourel N, Bourbonne V, Pradier O, Belliere A, Le Tinier F, Deberne M, Tanguy R, Denis F, Padovani L, Zaccariotto A, Molina T, Chalabreysse L, Brioude G, Delatour B, Faivre JC, Cao K, Giraud P, Riet FG, Thureau S, Antoni D, Massabeau C, Keller A, Bonnet E, Lerouge D, Martin E, Girard N, Botticella A. Recommendations for Post-Operative RadioTherapy After Complete Resection of Thymoma-a French DELPHI Consensus Initiative. J Thorac Oncol 2024; 19:1095-1107. [PMID: 38608932 DOI: 10.1016/j.jtho.2024.04.003] [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: 10/22/2023] [Revised: 03/29/2024] [Accepted: 04/06/2024] [Indexed: 04/14/2024]
Abstract
INTRODUCTION Thymomas are rare intrathoracic malignancies that can relapse after surgery. Whether or not Post-Operative RadioTherapy (PORT) should be delivered after surgery remains a major issue. RADIORYTHMIC is an ongoing, multicenter, randomized phase 3 trial addressing this question in patients with completely R0 resected Masaoka-Koga stage IIb/III thymoma. Experts in the field met to develop recommendations for PORT. METHODS A scientific committee from the RYTHMIC network identified key issues regarding the modalities of PORT in completely resected thymoma. A DELPHI method was used to question 24 national experts, with 115 questions regarding the following: (1) imaging techniques, (2) clinical target volume (CTV) and margins, (3) dose constraints to organs at risk, (4) dose and fractionation, and (5) follow-up and records. Consensus was defined when opinions reached more than or equal to 80% agreement. RESULTS We established the following recommendations: preoperative contrast-enhanced computed tomography (CT) scan is recommended (94% agreement); optimization of radiation delivery includes either a four-dimensional CT-based planning (82% agreement), a breath-holding inspiration breath-hold-based planning, or daily control CT imaging (81% agreement); imaging fusion based on cardiovascular structures of preoperative and planning CT scan is recommended (82% agreement); right coronary and left anterior descending coronary arteries should be delineated as cardiac substructures (88% agreement); rotational RCMI/volumetric modulated arc therapy is recommended (88% agreement); total dose is 50 Gy (81% agreement) with 1.8 to 2 Gy per fraction (94% agreement); cardiac evaluation and follow-up for patients with history of cardiovascular disease are recommended (88% agreement) with electrocardiogram and evaluation of left ventricular ejection fraction at 5 years and 10 years. CONCLUSION This is the first consensus for PORT in thymoma. Implementation will help to harmonize practices.
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Affiliation(s)
- Clémence Basse
- Institut du Thorax Curie-Montsouris, Institut Curie, Paris, France; Paris Saclay Campus, Versailles Saint Quentin University, Versailles, France
| | - Jonathan Khalifa
- Department of Radiotherapy, Institut Claudius Rigaud, Institut Universitaire du Cancer de Toulouse Oncopole, Toulouse, France
| | - François Thillays
- Department of Radiation Oncology, Institut de Cancérologie de l'Ouest Centre René Gauducheau, Nantes, France
| | - Cécile Le Pechoux
- Department of Radiation Oncology, Institut Gustave Roussy, Villejuif, France
| | - Jean-Michel Maury
- Department of Thoracic Surgery, Lung and Heart-Lung Transplantation, Louis Pradel Hospital, Hospices Civils de Lyon, Lyon, France; IVPC UMR754 INRA, Univ Lyon, Université Claude Bernard Lyon 1, EPHE, Lyon, France
| | | | | | - Nicolas Pourel
- Radiation Department, Institut Sainte Catherine, Avignon, France
| | - Vincent Bourbonne
- Department of Radiotherapy, University Hospital of Brest, Brest, France
| | - Olivier Pradier
- Department of Radiotherapy, University Hospital of Brest, Brest, France
| | - Aurélie Belliere
- Department of Radiotherapy, Centre Jean Perrin, Clermont-Ferrand, France
| | | | - Mélanie Deberne
- Department of Radiotherapy, Hospices Civils Lyonnais, Lyon, France
| | - Ronan Tanguy
- Department of Radiotherapy, Hospices Civils Lyonnais, Lyon, France
| | - Fabrice Denis
- Department of Radiotherapy, Centre de Cancérologie de la Sarthe, ELSAN, Le Mans, France
| | - Laetitia Padovani
- Department of Radiotherapy, Assistance Publique Hôpitaux de Marseille, Marseille, France
| | - Audrey Zaccariotto
- Department of Radiotherapy, Assistance Publique Hôpitaux de Marseille, Marseille, France
| | - Thierry Molina
- Pathology Department, Necker Enfants Malades Hospital, Université Paris Descartes, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France
| | - Lara Chalabreysse
- Department of Pathology, Groupement Hospitalier Est, Bron Cedex Lyon, France
| | - Geoffrey Brioude
- Department of Thoracic Surgery, Disease of the Oesophagus and Lung Transplantations, Hôpital Nord, Aix-Marseille University, Marseille, France
| | - Bertrand Delatour
- Department of Thoracic and Cardiovascular Surgery, Rennes University Hospital Center, Rennes, France
| | | | - Kim Cao
- Institut du Thorax Curie-Montsouris, Institut Curie, Paris, France
| | - Philippe Giraud
- Paris City University, Department of Radiation Oncology, Hopital Européen Georges Pompidou, Paris, France
| | | | | | - Delphine Antoni
- Department of Radiotherapy, ICANS, Institut de Cancérologie de Strasbourg, Strasbourg, France
| | - Carole Massabeau
- Department of Radiotherapy, Institut Claudius Rigaud, Toulouse, France
| | - Audrey Keller
- Department of Radiotherapy, Institut Claudius Rigaud, Toulouse, France
| | - Emilie Bonnet
- Department of Radiotherapy, IMR de Valence, Valence, France
| | | | - Etienne Martin
- Department of Radiotherapy, Centre Georges-François-Leclerc, Dijon, France
| | - Nicolas Girard
- Institut du Thorax Curie-Montsouris, Institut Curie, Paris, France; Paris Saclay Campus, Versailles Saint Quentin University, Versailles, France.
| | - Angela Botticella
- Department of Radiation Oncology, Institut Gustave Roussy, Villejuif, France
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Koyasu S. Imaging of thymic epithelial tumors-a clinical practice review. MEDIASTINUM (HONG KONG, CHINA) 2024; 8:41. [PMID: 39161582 PMCID: PMC11330907 DOI: 10.21037/med-23-66] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 05/16/2024] [Indexed: 08/21/2024]
Abstract
This review article comprehensively examines the diagnostic approach to thymic epithelial tumors (TETs) and other mediastinal masses, focusing on imaging modalities and differential diagnosis. Beginning with a discussion on traditional and contemporary classification systems for mediastinal tumors, including the Japanese Association for Research on the Thymus (JART) and International Thymic Interest Group (ITMIG) classifications, it highlights the shift towards computed tomography (CT)-based categorizations. Emphasis is placed on the importance of distinguishing between solid and cystic lesions in the anterior mediastinum, with detailed insights into imaging characteristics and histological features of various TET subtypes such as thymomas, thymic carcinomas, and thymic neuroendocrine tumors (NETs). The review also elucidates common differential diagnoses, including lymphomas and germ cell tumors, providing guidance on key imaging findings and considerations for accurate diagnosis. Furthermore, it underscores the significance of patient background and blood tests in differential diagnosis, discussing age-related prevalence patterns and tumor marker assessment. After addressing the diagnostic challenges posed by thymic cysts offering insights into their radiological features, management considerations, and potential complications, this review extends to other rare mediastinal lesions highlighting the need for a comprehensive evaluation for accurate identification and management of these tumors. Finally, as illustrative examples, we present six cases highlighting various aspects of anterior mediastinal tumors, including TET. These cases provide valuable insights into the diagnostic challenges, imaging characteristics, and management considerations encountered in clinical practice. The cases presented herein do not all illustrate typical images, courses, and diagnoses. However, they each contain significant implications. Thus, we present them with the belief that they will aid in understanding the intricate nuances of image diagnosis in actual clinical practice.
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Affiliation(s)
- Sho Koyasu
- Department of Diagnostic Imaging and Nuclear Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Klug M, Strange CD, Truong MT, Kirshenboim Z, Ofek E, Konen E, Marom EM. Thymic Imaging Pitfalls and Strategies for Optimized Diagnosis. Radiographics 2024; 44:e230091. [PMID: 38602866 DOI: 10.1148/rg.230091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/13/2024]
Abstract
Thymic imaging is challenging because the imaging appearance of a variety of benign and malignant thymic conditions are similar. CT is the most commonly used modality for mediastinal imaging, while MRI and fluorine 18 fluorodeoxyglucose (FDG) PET/CT are helpful when they are tailored to the correct indication. Each of these imaging modalities has limitations and technical pitfalls that may lead to an incorrect diagnosis and mismanagement. CT may not be sufficient for the characterization of cystic thymic processes and differentiation between thymic hyperplasia and thymic tumors. MRI can be used to overcome these limitations but is subject to other potential pitfalls such as an equivocal decrease in signal intensity at chemical shift imaging, size limitations, unusual signal intensity for cysts, subtraction artifacts, pseudonodularity on T2-weighted MR images, early imaging misinterpretation, flow and spatial resolution issues hampering assessment of local invasion, and the overlap of apparent diffusion coefficients between malignant and benign thymic entities. FDG PET/CT is not routinely indicated due to some overlap in FDG uptake between thymomas and benign thymic processes. However, it is useful for staging and follow-up of aggressive tumors (eg, thymic carcinoma), particularly for detection of occult metastatic disease. Pitfalls in imaging after treatment of thymic malignancies relate to technical challenges such as postthymectomy sternotomy streak metal artifacts, differentiation of postsurgical thymic bed changes from tumor recurrence, or human error with typical "blind spots" for identification of metastatic disease. Understanding these pitfalls enables appropriate selection of imaging modalities, improves diagnostic accuracy, and guides patient treatment. ©RSNA, 2024 Test Your Knowledge questions for this article are available in the supplemental material.
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Affiliation(s)
- Maximiliano Klug
- From the Division of Diagnostic Imaging (M.K., Z.K., E.K., E.M.M.) and Institute of Pathology (E.O.), The Chaim Sheba Medical Center, Tel Hashomer, 2 Derech Sheba St, Ramat Gan, 5265601, Israel; Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel (M.K., Z.K., E.O., E.K., E.M.M.); and Department of Thoracic Imaging, University of Texas MD Anderson Cancer Center, Houston, Tex (C.D.S., M.T.T.)
| | - Chad D Strange
- From the Division of Diagnostic Imaging (M.K., Z.K., E.K., E.M.M.) and Institute of Pathology (E.O.), The Chaim Sheba Medical Center, Tel Hashomer, 2 Derech Sheba St, Ramat Gan, 5265601, Israel; Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel (M.K., Z.K., E.O., E.K., E.M.M.); and Department of Thoracic Imaging, University of Texas MD Anderson Cancer Center, Houston, Tex (C.D.S., M.T.T.)
| | - Mylene T Truong
- From the Division of Diagnostic Imaging (M.K., Z.K., E.K., E.M.M.) and Institute of Pathology (E.O.), The Chaim Sheba Medical Center, Tel Hashomer, 2 Derech Sheba St, Ramat Gan, 5265601, Israel; Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel (M.K., Z.K., E.O., E.K., E.M.M.); and Department of Thoracic Imaging, University of Texas MD Anderson Cancer Center, Houston, Tex (C.D.S., M.T.T.)
| | - Zehavit Kirshenboim
- From the Division of Diagnostic Imaging (M.K., Z.K., E.K., E.M.M.) and Institute of Pathology (E.O.), The Chaim Sheba Medical Center, Tel Hashomer, 2 Derech Sheba St, Ramat Gan, 5265601, Israel; Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel (M.K., Z.K., E.O., E.K., E.M.M.); and Department of Thoracic Imaging, University of Texas MD Anderson Cancer Center, Houston, Tex (C.D.S., M.T.T.)
| | - Efrat Ofek
- From the Division of Diagnostic Imaging (M.K., Z.K., E.K., E.M.M.) and Institute of Pathology (E.O.), The Chaim Sheba Medical Center, Tel Hashomer, 2 Derech Sheba St, Ramat Gan, 5265601, Israel; Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel (M.K., Z.K., E.O., E.K., E.M.M.); and Department of Thoracic Imaging, University of Texas MD Anderson Cancer Center, Houston, Tex (C.D.S., M.T.T.)
| | - Eli Konen
- From the Division of Diagnostic Imaging (M.K., Z.K., E.K., E.M.M.) and Institute of Pathology (E.O.), The Chaim Sheba Medical Center, Tel Hashomer, 2 Derech Sheba St, Ramat Gan, 5265601, Israel; Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel (M.K., Z.K., E.O., E.K., E.M.M.); and Department of Thoracic Imaging, University of Texas MD Anderson Cancer Center, Houston, Tex (C.D.S., M.T.T.)
| | - Edith Michelle Marom
- From the Division of Diagnostic Imaging (M.K., Z.K., E.K., E.M.M.) and Institute of Pathology (E.O.), The Chaim Sheba Medical Center, Tel Hashomer, 2 Derech Sheba St, Ramat Gan, 5265601, Israel; Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel (M.K., Z.K., E.O., E.K., E.M.M.); and Department of Thoracic Imaging, University of Texas MD Anderson Cancer Center, Houston, Tex (C.D.S., M.T.T.)
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Hermann J, Atay S, Swanson M. A Painless Right Anterior Neck Mass. JAMA Otolaryngol Head Neck Surg 2024; 150:181-182. [PMID: 38127334 DOI: 10.1001/jamaoto.2023.3953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
A 58-year-old woman presents with a several-week history of a painless right-sided swelling on her anterior neck. What is your diagnosis?
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Affiliation(s)
- Julia Hermann
- Keck School of Medicine, University of Southern California, Los Angeles
| | - Scott Atay
- Division of Thoracic Surgery, Department of Surgery, Keck School of Medicine, University of Southern California, Los Angeles
| | - Mark Swanson
- Caruso Department of Otolaryngology-Head and Neck Surgery, Keck School of Medicine, University of Southern California, Los Angeles
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Zhou S, Tsui P, Lin M, Chen G, Chen W, Cai X. A diagnostic model based on 18F-FDG PET/CT parameters in improving the differential diagnosis of invasive thymic epithelial tumors and anterior mediastinal lymphomas. BMC Med Imaging 2024; 24:14. [PMID: 38191331 PMCID: PMC10773031 DOI: 10.1186/s12880-023-01185-1] [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: 04/18/2023] [Accepted: 12/22/2023] [Indexed: 01/10/2024] Open
Abstract
BACKGROUND Accurately distinguishing between invasive thymic epithelial tumors (TETs) and anterior mediastinal lymphoma before surgery is crucial for subsequent treatment choices. But currently, the diagnosis of invasive TET is sometimes difficult to distinguish from anterior mediastinal lymphoma. OBJECTIVE To assess the application of fluorine-18-fluorodeoxyglucose (18F-FDG) positron emission tomography/computer tomography (PET/CT) in the differential diagnosis of TETs and anterior mediastinal lymphomas. METHODS 18F-FDG PET/CT images of 133 invasive TETs and anterior mediastinal lymphomas patients were retrospectively analyzed. In particular, the tumor's longest diameter and maximum standardized uptake value (SUVmax) were evaluated. The SUVmax and longest diameter values of the two groups were analyzed by using the receiver operating characteristic (ROC) curve to determine the optimal threshold and diagnostic efficiency. RESULTS Age, myasthenia gravis, SUVmax and tumor longest diameter differed significantly between invasive TETs and anterior mediastinal lymphomas patients. The tumor location, calcification, relationship with adjacent vessels and distant metastasis differed significantly between the groups. The ROC analysis showed an AUC for SUVmax and tumor longest diameter of 0.841 and 0.737. Respectively, the cutoff values with the best diagnostic performance were 9.65 (sensitivity: 77.78%, specificity: 81.97%) and 6.65 (sensitivity: 80.56%, specificity: 62.30%) for SUVmax and tumor longest diameter. The diagnostic model of SUVmax, calcification, relationship with surrounding blood vessels, lymph node metastasis and lung metastasis in the highest AUC of 0.935 (sensitivity: 90.16%, specificity: 88.89%). In addition, we incorporated splenic involvement and metastatic sub-diaphragmatic lymph node into Model 2 as a new predictive model 3 for differential diagnosis and found a significant improvement in the diagnostic performance of Model 3. CONCLUSION The diagnostic model composed of 18F-FDG PET parameters is improving the differential diagnosis of invasive TETs and anterior mediastinal lymphomas.
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Affiliation(s)
- Shuo Zhou
- Department of Nuclear Medicine, Shengli Clinical Medical College of Fujian Medical University, Fujian Provincial Hospital, Fuzhou City, Fujian Province, China
| | - Pokwan Tsui
- Medical Imaging Center, First Affiliated Hospital of Jinan University, No. 613 West Huangpu Avenue, Tianhe District, Guangzhou, 510630, Guangdong, China
| | - Meifu Lin
- Department of Nuclear Medicine, Shengli Clinical Medical College of Fujian Medical University, Fujian Provincial Hospital, Fuzhou City, Fujian Province, China
| | - Guobao Chen
- Department of Nuclear Medicine, Shengli Clinical Medical College of Fujian Medical University, Fujian Provincial Hospital, Fuzhou City, Fujian Province, China
| | - Wenxin Chen
- Department of Nuclear Medicine, Shengli Clinical Medical College of Fujian Medical University, Fujian Provincial Hospital, Fuzhou City, Fujian Province, China.
| | - Xiangran Cai
- Medical Imaging Center, First Affiliated Hospital of Jinan University, No. 613 West Huangpu Avenue, Tianhe District, Guangzhou, 510630, Guangdong, China.
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Li J, Cui N, Jiang Z, Li W, Liu W, Wang S, Wang K. Differentiating thymic epithelial tumors from mediastinal lymphomas: preoperative nomograms based on PET/CT radiomic features to minimize unnecessary anterior mediastinal surgery. J Cancer Res Clin Oncol 2023; 149:14101-14112. [PMID: 37552308 DOI: 10.1007/s00432-023-05054-w] [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: 05/17/2023] [Accepted: 06/28/2023] [Indexed: 08/09/2023]
Abstract
PURPOSE Clinical feasibility nomograms were developed to facilitate the differentiation between thymic epithelial tumors (TETs) and mediastinal lymphomas (MLs), aiming to minimize the occurrence of non-therapeutic thymectomy. METHODS A total of 255 patients diagnosed with TETs or MLs underwent pre-treatment 18F-FDG PET/CT. Comprehensive clinical and imaging data were collected, including age, gender, lactate dehydrogenase (LDH) level, pathological results, presence of myasthenia gravis symptoms, B symptoms, mass size, location, morphology, margins, density, and metabolic parameters derived from PET/CT. Radiomic features were extracted from the region of interest (ROI) of the primary lesion. Feature selection techniques were employed to identify the most discriminative subset of features. Machine learning methods were utilized to build candidate models, which were subsequently evaluated based on their area under the curve (AUC). Finally, nomograms were constructed using the optimal model to provide a clinical tool for improved diagnostic accuracy. The performance of the radiomic models was evaluated by their calibration, discrimination, and clinical utility. RESULTS Several independent risk factors were identified for distinguishing TETs from MLs, including average standardized uptake value (SUVavg), LDH, age, mass size, and radiomic score (rad-score). Significance was observed in differentiating the two types of tumors based on these factors. The best clinical efficacy was demonstrated by the combined model, with an impressive AUC of 0.954. Decision curve analysis and calibration curves indicated that the combined model was clinically advantageous for discriminating TETs from MLs. Besides, the results of external validation showed a sensitivity of 0.8 and a specificity of 0.78. CONCLUSION Preoperatively, the differentiation of TETs from MLs can be facilitated by the utilization of the combined clinical information and radiomics model. This approach holds promise in minimizing the occurrence of unnecessary anterior mediastinal surgeries.
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Affiliation(s)
- Jiatong Li
- PET-CT/MRI Department, Harbin Medical University Cancer Hospital, Harbin Medical University, 150 Haping Road, Harbin, 150081, Heilongjiang, China
| | - Nan Cui
- PET-CT/MRI Department, Harbin Medical University Cancer Hospital, Harbin Medical University, 150 Haping Road, Harbin, 150081, Heilongjiang, China
| | - Zhiyun Jiang
- Radiology Department, Harbin Medical University Cancer Hospital, Harbin Medical University, 150 Haping Road, Harbin, 150081, Heilongjiang, China
| | - Wei Li
- Interventional Vascular Surgery Department, The 4th Affiliated Hospital of Harbin Medical University, Harbin Medical University, 37 Yiyuan Road, Harbin, 150001, Heilongjiang, China
| | - Wei Liu
- PET-CT/MRI Department, Harbin Medical University Cancer Hospital, Harbin Medical University, 150 Haping Road, Harbin, 150081, Heilongjiang, China
| | - Shuai Wang
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, No. 180, Fenglin Road, Shanghai, 200032, China.
| | - Kezheng Wang
- PET-CT/MRI Department, Harbin Medical University Cancer Hospital, Harbin Medical University, 150 Haping Road, Harbin, 150081, Heilongjiang, China.
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Norman J, Leclair B, Clua M, Aubert L, Toldas J, Cudennec T. [Suspicion of thymoma]. SOINS. GERONTOLOGIE 2023; 28:47-48. [PMID: 37977765 DOI: 10.1016/j.sger.2023.09.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Affiliation(s)
- Juliette Norman
- Service de gériatrie, AP-HP, Université Paris-Saclay, Site Ambroise-Paré, 9 avenue Charles-de-Gaulle, 92100 Boulogne-Billancourt, France.
| | - Bathilde Leclair
- Service de gériatrie, AP-HP, Université Paris-Saclay, Site Ambroise-Paré, 9 avenue Charles-de-Gaulle, 92100 Boulogne-Billancourt, France
| | - Morane Clua
- Service de gériatrie, AP-HP, Université Paris-Saclay, Site Ambroise-Paré, 9 avenue Charles-de-Gaulle, 92100 Boulogne-Billancourt, France
| | - Lucie Aubert
- Service de gériatrie, AP-HP, Université Paris-Saclay, Site Ambroise-Paré, 9 avenue Charles-de-Gaulle, 92100 Boulogne-Billancourt, France
| | - Jacob Toldas
- Service de gériatrie, AP-HP, Université Paris-Saclay, Site Ambroise-Paré, 9 avenue Charles-de-Gaulle, 92100 Boulogne-Billancourt, France
| | - Tristan Cudennec
- Service de gériatrie, AP-HP, Université Paris-Saclay, Site Ambroise-Paré, 9 avenue Charles-de-Gaulle, 92100 Boulogne-Billancourt, France
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Ahuja J, Strange CD, Agrawal R, Erasmus LT, Truong MT. Approach to Imaging of Mediastinal Masses. Diagnostics (Basel) 2023; 13:3171. [PMID: 37891992 PMCID: PMC10606219 DOI: 10.3390/diagnostics13203171] [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: 09/08/2023] [Revised: 10/04/2023] [Accepted: 10/07/2023] [Indexed: 10/29/2023] Open
Abstract
Mediastinal masses present a diagnostic challenge due to their diverse etiologies. Accurate localization and internal characteristics of the mass are the two most important factors to narrow the differential diagnosis or provide a specific diagnosis. The International Thymic Malignancy Interest Group (ITMIG) classification is the standard classification system used to localize mediastinal masses. Computed tomography (CT) and magnetic resonance imaging (MRI) are the two most commonly used imaging modalities for characterization of the mediastinal masses.
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Affiliation(s)
- Jitesh Ahuja
- Department of Thoracic Imaging, The University of Texas MD Andeson Cancer Center, Houston, TX 77030, USA; (C.D.S.); (R.A.); (M.T.T.)
| | - Chad D. Strange
- Department of Thoracic Imaging, The University of Texas MD Andeson Cancer Center, Houston, TX 77030, USA; (C.D.S.); (R.A.); (M.T.T.)
| | - Rishi Agrawal
- Department of Thoracic Imaging, The University of Texas MD Andeson Cancer Center, Houston, TX 77030, USA; (C.D.S.); (R.A.); (M.T.T.)
| | - Lauren T. Erasmus
- Department of Anatomy and Cell Biology, Faculty of Sciences, McGill University, Montreal, QC H3A 0G4, Canada;
| | - Mylene T. Truong
- Department of Thoracic Imaging, The University of Texas MD Andeson Cancer Center, Houston, TX 77030, USA; (C.D.S.); (R.A.); (M.T.T.)
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Doi S, Yanagawa M, Matsui T, Hata A, Kikuchi N, Yoshida Y, Yamagata K, Ninomiya K, Kido S, Tomiyama N. Usefulness of Three-Dimensional Iodine Mapping Quantified by Dual-Energy CT for Differentiating Thymic Epithelial Tumors. J Clin Med 2023; 12:5610. [PMID: 37685677 PMCID: PMC10488564 DOI: 10.3390/jcm12175610] [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: 07/23/2023] [Revised: 08/14/2023] [Accepted: 08/26/2023] [Indexed: 09/10/2023] Open
Abstract
Background: Dual-energy CT has been reported to be useful for differentiating thymic epithelial tumors. The purpose is to evaluate thymic epithelial tumors by using three-dimensional (3D) iodine density histogram texture analysis on dual-energy CT and to investigate the association of extracellular volume fraction (ECV) with the fibrosis of thymic carcinoma. Methods: 42 patients with low-risk thymoma (n = 20), high-risk thymoma (n = 16), and thymic carcinoma (n = 6) were scanned by dual-energy CT. 3D iodine density histogram texture analysis was performed for each nodule on iodine density mapping: Seven texture features (max, min, median, average, standard deviation [SD], skewness, and kurtosis) were obtained. The iodine effect (average on DECT180s-average on unenhanced DECT) and ECV on DECT180s were measured. Tissue fibrosis was subjectively rated by one pathologist on a three-point grade. These quantitative data obtained by examining associations with thymic carcinoma and high-risk thymoma were analyzed with univariate and multivariate logistic regression models (LRMs). The area under the curve (AUC) was calculated by the receiver operating characteristic curves. p values < 0.05 were significant. Results: The multivariate LRM showed that ECV > 21.47% in DECT180s could predict thymic carcinoma (odds ratio [OR], 11.4; 95% confidence interval [CI], 1.18-109; p = 0.035). Diagnostic performance was as follows: Sensitivity, 83.3%; specificity, 69.4%; AUC, 0.76. In high-risk thymoma vs. low-risk thymoma, the multivariate LRM showed that the iodine effect ≤1.31 mg/cc could predict high-risk thymoma (OR, 7; 95% CI, 1.02-39.1; p = 0.027). Diagnostic performance was as follows: Sensitivity, 87.5%; specificity, 50%; AUC, 0.69. Tissue fibrosis significantly correlated with thymic carcinoma (p = 0.026). Conclusions: ECV on DECT180s related to fibrosis may predict thymic carcinoma from thymic epithelial tumors, and the iodine effect on DECT180s may predict high-risk thymoma from thymoma.
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Affiliation(s)
- Shuhei Doi
- Department of Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita-City 565-0871, Osaka, Japan
| | - Masahiro Yanagawa
- Department of Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita-City 565-0871, Osaka, Japan
| | - Takahiro Matsui
- Department of Pathology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita-City 565-0871, Osaka, Japan
| | - Akinori Hata
- Department of Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita-City 565-0871, Osaka, Japan
| | - Noriko Kikuchi
- Department of Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita-City 565-0871, Osaka, Japan
| | - Yuriko Yoshida
- Department of Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita-City 565-0871, Osaka, Japan
| | - Kazuki Yamagata
- Department of Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita-City 565-0871, Osaka, Japan
| | - Keisuke Ninomiya
- Department of Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita-City 565-0871, Osaka, Japan
| | - Shoji Kido
- Department of Artificial Intelligence Diagnostic Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita-City 565-0871, Osaka, Japan
| | - Noriyuki Tomiyama
- Department of Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita-City 565-0871, Osaka, Japan
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Tartarone A, Lerose R, Lettini AR, Tartarone M. Current Treatment Approaches for Thymic Epithelial Tumors. Life (Basel) 2023; 13:life13051170. [PMID: 37240815 DOI: 10.3390/life13051170] [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: 02/27/2023] [Revised: 05/07/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023] Open
Abstract
Thymic epithelial tumors (TETs), including thymoma, thymic carcinoma and neuroendocrine tumors, are uncommon tumors that originate from the epithelial cells of the thymus. Nevertheless, despite their rarity, they represent the most common tumor type located in the anterior mediastinum. Therapeutic choices based on staging and histology may include surgery with or without neoadjuvant or adjuvant therapy represented by chemotherapy, radiotherapy or chemo-radiotherapy. For patients with advanced or metastatic TETs, platinum-based chemotherapy remains the standard first-line treatment; however, some new drugs and combinations are currently under evaluation. In any case, proper management of patients with TETs requires a multidisciplinary team approach to personalize care for each patient.
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Affiliation(s)
- Alfredo Tartarone
- Department of Onco-Hematology, Division of Medical Oncology, IRCCS-CROB Referral Cancer Center of Basilicata, 85028 Rionero in Vulture, Italy
| | - Rosa Lerose
- Hospital Pharmacy, IRCCS-CROB Referral Cancer Center of Basilicata, 85028 Rionero in Vulture, Italy
| | - Alessandro Rocco Lettini
- Unit of Clinical Psychology, IRCCS-CROB Referral Cancer Center of Basilicata, 85028 Rionero in Vulture, Italy
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12
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Halperin R, Urban D, Tirosh A. A Case of Metastatic Thymoma Responsive to Treatment With 177 Lu-DOTATATE. Clin Nucl Med 2023; 48:e190-e192. [PMID: 36728154 DOI: 10.1097/rlu.0000000000004553] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
ABSTRACT We describe a case of a 74-year-old woman with germline BRCA2 mutation, with an incidental diagnosis of metastatic thymoma presenting as a mediastinal mass with cardiac muscle and lymph node involvement. Despite surgical and radiotherapy treatment, there was marked advancement with new lung and liver metastases. All lesions demonstrated 68 Ga-DOTATATE PET/CT uptake, and the patient received 4 peptide receptor radionuclide therapy cycles with 177 Lu-DOTATATE, with pronounced reduction in the size of the liver, cardiac, and pleural lesions. This is the first case to demonstrate partial response to peptide receptor radionuclide therapy in metastatic thymoma, thus suggesting possible treatment option to refractory and advancing metastatic thymoma.
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13
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Epigenetics of Thymic Epithelial Tumors. Cancers (Basel) 2023; 15:cancers15020360. [PMID: 36672310 PMCID: PMC9856807 DOI: 10.3390/cancers15020360] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 12/30/2022] [Accepted: 01/02/2023] [Indexed: 01/08/2023] Open
Abstract
Thymic epithelial tumors (TETs) arise from the epithelial cells of the thymus and consist in the 1% of all adult malignancies, despite the fact that they are the most common lesions of the anterior mediastinum. TETs can be divided mainly into thymomas, thymic carcinomas, and the rarest ad aggressive neuroendocrine forms. Despite the surgical resection is quite resolving, the diagnosis of TETs is complicated by the absence of symptoms and the clinical presentation aggravated by several paraneoplastic disorders, including myasthenia gravis. Thus, the heterogeneity of TETs prompts the search for molecular biomarkers that could be helpful for tumor characterization and clinical outcomes prediction. With these aims, several researchers investigated the epigenetic profiles of TETs. In this manuscript, we narratively review the works investigating the deregulation of epigenetic mechanisms in TETs, highlighting the need for further studies combining genetic, epigenetic, and expression data to better characterize the different molecular subtypes and identify, for each of them, the most relevant epigenetic biomarkers of clinical utility.
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14
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Wilde SA, Carroway WP, Hsu DS, Banks KC, Velotta JB. Invasive type B2 thymoma associated with myasthenia gravis, resection with superior vena cava reconstruction. J Surg Case Rep 2022; 2022:rjac368. [PMID: 36071728 PMCID: PMC9444289 DOI: 10.1093/jscr/rjac368] [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: 07/10/2022] [Accepted: 07/27/2022] [Indexed: 11/13/2022] Open
Abstract
After being diagnosed with myasthenia gravis, a 55-year-old male was referred for treatment of an invasive thymoma. Preoperative imaging revealed a thymoma adjacent to the superior vena cava (SVC) with possible invasion of the left innominate vein. After multidisciplinary discussion, he underwent upfront en bloc resection of the tumor with SVC resection and reconstruction. He was discharged after an uncomplicated postoperative course with improvement of his symptoms.
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Affiliation(s)
- Sawley A Wilde
- Department of Surgery, UCSF East Bay , Oakland, CA , USA
| | | | - Diana S Hsu
- Department of Surgery, UCSF East Bay , Oakland, CA , USA
| | - Kian C Banks
- Department of Surgery, UCSF East Bay , Oakland, CA , USA
| | - Jeffrey B Velotta
- Department of Thoracic Surgery, Kaiser Oakland Medical Center , Oakland, CA , USA
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15
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Covington MF, Koppula BR, Fine GC, Salem AE, Wiggins RH, Hoffman JM, Morton KA. PET-CT in Clinical Adult Oncology: II. Primary Thoracic and Breast Malignancies. Cancers (Basel) 2022; 14:cancers14112689. [PMID: 35681669 PMCID: PMC9179296 DOI: 10.3390/cancers14112689] [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: 04/27/2022] [Revised: 05/20/2022] [Accepted: 05/26/2022] [Indexed: 12/24/2022] Open
Abstract
Simple Summary Positron emission tomography (PET), typically combined with computed tomography (CT), has become a critical advanced imaging technique in oncology. With PET-CT, a radioactive molecule (radiotracer) is injected in the bloodstream and localizes to sites of tumor because of specific cellular features of the tumor that accumulate the targeting radiotracer. The CT scan, performed at the same time, provides information to facilitate assessment of the amount of radioactivity from deep or dense structures, and to provide detailed anatomic information. PET-CT has a variety of applications in oncology, including staging, therapeutic response assessment, restaging, and surveillance. This series of six review articles provides an overview of the value, applications, and imaging and interpretive strategies of PET-CT in the more common adult malignancies. The second article in this series addresses the use of PET-CT in breast cancer and other primary thoracic malignancies. Abstract Positron emission tomography combined with x-ray computed tomography (PET-CT) is an advanced imaging modality with oncologic applications that include staging, therapy assessment, restaging, and surveillance. This six-part series of review articles provides practical information to providers and imaging professionals regarding the best use of PET-CT for the more common adult malignancies. The second article of this series addresses primary thoracic malignancy and breast cancer. For primary thoracic malignancy, the focus will be on lung cancer, malignant pleural mesothelioma, thymoma, and thymic carcinoma, with an emphasis on the use of FDG PET-CT. For breast cancer, the various histologic subtypes will be addressed, and will include 18F fluorodeoxyglucose (FDG), recently Food and Drug Administration (FDA)-approved 18F-fluoroestradiol (FES), and 18F sodium fluoride (NaF). The pitfalls and nuances of PET-CT in breast and primary thoracic malignancies and the imaging features that distinguish between subcategories of these tumors are addressed. This review will serve as a resource for the appropriate roles and limitations of PET-CT in the clinical management of patients with breast and primary thoracic malignancies for healthcare professionals caring for adult patients with these cancers. It also serves as a practical guide for imaging providers, including radiologists, nuclear medicine physicians, and their trainees.
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Affiliation(s)
- Matthew F. Covington
- Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT 84132, USA; (M.F.C.); (B.R.K.); (G.C.F.); (A.E.S.); (R.H.W.); (J.M.H.)
| | - Bhasker R. Koppula
- Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT 84132, USA; (M.F.C.); (B.R.K.); (G.C.F.); (A.E.S.); (R.H.W.); (J.M.H.)
| | - Gabriel C. Fine
- Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT 84132, USA; (M.F.C.); (B.R.K.); (G.C.F.); (A.E.S.); (R.H.W.); (J.M.H.)
| | - Ahmed Ebada Salem
- Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT 84132, USA; (M.F.C.); (B.R.K.); (G.C.F.); (A.E.S.); (R.H.W.); (J.M.H.)
- Department of Radiodiagnosis and Intervention, Faculty of Medicine, Alexandria University, Alexandria 21526, Egypt
| | - Richard H. Wiggins
- Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT 84132, USA; (M.F.C.); (B.R.K.); (G.C.F.); (A.E.S.); (R.H.W.); (J.M.H.)
| | - John M. Hoffman
- Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT 84132, USA; (M.F.C.); (B.R.K.); (G.C.F.); (A.E.S.); (R.H.W.); (J.M.H.)
| | - Kathryn A. Morton
- Department of Radiology and Imaging Sciences, University of Utah, Salt Lake City, UT 84132, USA; (M.F.C.); (B.R.K.); (G.C.F.); (A.E.S.); (R.H.W.); (J.M.H.)
- Intermountain Healthcare Hospitals, Summit Physician Specialists, Murray, UT 84123, USA
- Correspondence: ; Tel.: +1-801-581-7553
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16
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Wang S, Ao Y, Jiang J, Lin M, Chen G, Liu J, Zhao S, Gao J, Zhang Y, Ding J, Tan L. How can the rate of nontherapeutic thymectomy be reduced? Interact Cardiovasc Thorac Surg 2022; 35:6586802. [PMID: 35579357 PMCID: PMC9419679 DOI: 10.1093/icvts/ivac132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 05/12/2022] [Indexed: 11/14/2022] Open
Affiliation(s)
- Shuai Wang
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Yongqiang Ao
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Jiahao Jiang
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Miao Lin
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Gang Chen
- Department of Pathology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Junzhen Liu
- Department of Radiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Shihai Zhao
- Department of Radiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Jian Gao
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Yi Zhang
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Jianyong Ding
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Lijie Tan
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
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