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Encinas Tobajas VM, Almeida González C, Marcilla D, Vallejo M, Cano Rodríguez A, Reina Sánchez de Movellán JI, Morales Pérez JM. Myxoid liposarcoma: MRI features with histological correlation. RADIOLOGIA 2023; 65 Suppl 2:S23-S32. [PMID: 37858349 DOI: 10.1016/j.rxeng.2021.01.006] [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: 03/12/2020] [Accepted: 01/30/2021] [Indexed: 10/18/2022]
Abstract
BACKGROUND AND AIMS Myxoid liposarcoma is classified in the group of sarcomas with adipose differentiation, which is the second most common group of sarcomas. However, myxoid liposarcoma is not a homogeneous entity, because the behavior and clinical course of these tumours can vary widely. This study aimed to describe the magnetic resonance imaging (MRI) features of myxoid liposarcomas and to determine whether the MRI features are associated with the histologic grade and can differentiate between low-grade and high-grade tumours and thus help in clinical decision making. MATERIAL AND METHODS We studied 36 patients with myxoid liposarcomas treated at our centre between 2010 and 2018. We analysed clinical variables (age, sex, and tumour site) and MRI features (size, depth, borders, fatty component, myxoid component, non-fatty/non-myxoid component, apparent diffusion coefficient (ADC), and type of enhancement after the administration of intravenous contrast material). We correlated the MRI features with the histologic grade and the percentage of round cells. RESULTS In our series, patients with myxoid liposarcomas were mainly young adults (median age, 43 years). There were no differences between sexes; 97.2% were located in the lower limbs, 86.1% were deep, and 77.8% had well-defined borders. Of the 23 myxoid liposarcomas that contained no fat, 16 (69.6%) were high grade (p = 0.01). All the tumors with a myxoid component of less than 25% were high grade (p = 0.01); 83.3% of those with a non-fatty/non-myxoid component greater than 50% were high grade (p = 0.03) and 61.5% had more than 5% round cells (p = 0.01). Diffusion sequences were obtained in 14 of the 36 patients; ADC values were high (median, 2 × 10-3 mm2/s), although there were no significant associations between low-grade and high-grade tumours. Contrast-enhanced images were available for 30 (83.3%) patients; 83.3% of the tumours with heterogeneous enhancement were high grade (p = 0.01). CONCLUSIONS MRI can be useful for differentiating between high- and low-grade myxoid liposarcomas and can help in clinical decision making.
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Affiliation(s)
- V M Encinas Tobajas
- Unidad de Gestión Clínica de Radiodiagnóstico, Hospital Universitario Virgen del Rocío, Sevilla, Spain.
| | - C Almeida González
- Unidad de Bioestadística, Hospital Universitario Virgen de Valme, Sevilla, Spain
| | - D Marcilla
- Unidad de Gestión Clínica de Anatomía Patológica, Hospital Universitario Virgen del Rocío, Sevilla, Spain
| | - M Vallejo
- Unidad de Gestión Clínica de Radiodiagnóstico, Hospital Universitario Virgen del Rocío, Sevilla, Spain
| | - A Cano Rodríguez
- Unidad de Gestión Clínica de Radiodiagnóstico, Hospital Universitario Virgen del Rocío, Sevilla, Spain
| | | | - J M Morales Pérez
- Unidad de Gestión Clínica de Radiodiagnóstico, Hospital Universitario Virgen del Rocío, Sevilla, Spain
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Edelmuth DGL, Helito PVP, Filippi RZ, Baptista AM, Bordalo M. Staging of primary and secondary solid musculoskeletal tumors. Skeletal Radiol 2023; 52:365-378. [PMID: 35974195 DOI: 10.1007/s00256-022-04118-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 07/06/2022] [Accepted: 07/08/2022] [Indexed: 02/02/2023]
Affiliation(s)
- Diogo Guilherme Leão Edelmuth
- Radiology Department, Instituto de Ortopedia E Traumatologia, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil.,Radiology Department, Instituto de Radiologia, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Paulo Victor Partezani Helito
- Radiology Department, Instituto de Ortopedia E Traumatologia, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil.,Radiology Department, Instituto de Radiologia, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Renée Zon Filippi
- Pathology Department, Instituto de Ortopedia E Traumatologia, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - André Mathias Baptista
- Orthopedic Oncology Department, Instituto de Ortopedia E Traumatologia, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil
| | - Marcelo Bordalo
- Radiology Department, Instituto de Ortopedia E Traumatologia, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil. .,Radiology Department, Instituto de Radiologia, Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, Brazil.
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3
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The Role of Imaging in Soft Tissue Sarcoma Diagnosis and Management. Surg Clin North Am 2022; 102:539-550. [DOI: 10.1016/j.suc.2022.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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4
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Souza F, Cardoso FN, Cortes C, Rosenberg A, Subhawong TK. Soft Tissue Tumors. Radiol Clin North Am 2022; 60:283-299. [DOI: 10.1016/j.rcl.2021.11.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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5
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Magnetic resonance imaging of trunk and extremity myxoid liposarcoma: diagnosis, staging, and response to treatment. Skeletal Radiol 2021; 50:1963-1980. [PMID: 33792747 DOI: 10.1007/s00256-021-03769-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 03/22/2021] [Accepted: 03/22/2021] [Indexed: 02/07/2023]
Abstract
Myxoid liposarcoma (MLS) accounts for approximately 30% of all liposarcomas. The majority are intermediate-grade tumours, but the presence of >5% round cell component renders it a high-grade sarcoma with subsequent poorer outcome. MLS most commonly arises in the lower extremities, has a predilection for extra-pulmonary sites of metastatic disease, and is recognized to be radiosensitive. The purpose of the current article is to review the role of MRI in the management of MLS, including the characteristic features of the primary tumour, features which help to identify a round cell component and thus determine prognosis, the role of whole-body MRI for evaluation of extra-pulmonary metastatic disease, and the utility of MRI for assessing treatment response. The MRI differential diagnosis of MLS is also considered.
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Encinas Tobajas VM, Almeida González C, Marcilla D, Vallejo M, Cano Rodríguez A, Reina Sánchez de Movellán JI, Morales Pérez JM. Myxoid liposarcoma: MRI features with histological correlation. RADIOLOGIA 2021; 65:S0033-8338(21)00052-7. [PMID: 33722389 DOI: 10.1016/j.rx.2021.01.005] [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: 03/12/2020] [Revised: 01/27/2021] [Accepted: 01/30/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND AND AIMS Myxoid liposarcoma is classified in the group of sarcomas with adipose differentiation, which is the second most common group of sarcomas. However, myxoid liposarcoma is not a homogeneous entity, because the behavior and clinical course of these tumors can vary widely. This study aimed to describe the magnetic resonance imaging (MRI) features of myxoid liposarcomas and to determine whether the MRI features are associated with the histologic grade and can differentiate between low-grade and high-grade tumors and thus help in clinical decision making. MATERIAL AND METHODS We studied 36 patients with myxoid liposarcomas treated at our center between 2010 and 2018. We analyzed clinical variables (age, sex, and tumor site) and MRI features (size, depth, borders, fatty component, myxoid component, non-fatty / non-myxoid component, apparent diffusion coefficient (ADC), and type of enhancement after the administration of intravenous contrast material). We correlated the MRI features with the histologic grade and the percentage of round cells. RESULTS In our series, patients with myxoid liposarcomas were mainly young adults (median age, 43 years). There were no differences between sexes; 97.2% were located in the lower limbs, 86.1% were deep, and 77.8% had well-defined borders. Of the 23 myxoid liposarcomas that contained no fat, 16 (69.6%) were high grade (p=0.01). All the tumors with a myxoid component of less than 25% were high grade (p=0.01); 83.3% of those with a non-fatty / non-myxoid component greater than 50% were high grade (p=0.03) and 61.5% had more than 5% round cells (p=0.01). Diffusion sequences were obtained in 14 of the 36 patients; ADC values were high (median, 2 x 10-3 mm2/s), although there were no significant associations between low-grade and high-grade tumors. Contrast-enhanced images were available for 30 (83.3%) patients; 83.3% of the tumors with heterogeneous enhancement were high grade (p=0.01). CONCLUSIONS MRI can be useful for differentiating between high- and low-grade myxoid liposarcomas and can help in clinical decision making.
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Affiliation(s)
- V M Encinas Tobajas
- Unidad de Gestión Clínica de Radiodiagnóstico, Hospital Universitario Virgen del Rocío, Sevilla, España.
| | - C Almeida González
- Unidad de Bioestadística, Hospital Universitario Virgen de Valme, Sevilla, España
| | - D Marcilla
- Unidad de Gestión Clínica de Anatomía Patológica, Hospital Universitario Virgen del Rocío, Sevilla, España
| | - M Vallejo
- Unidad de Gestión Clínica de Radiodiagnóstico, Hospital Universitario Virgen del Rocío, Sevilla, España
| | - A Cano Rodríguez
- Unidad de Gestión Clínica de Radiodiagnóstico, Hospital Universitario Virgen del Rocío, Sevilla, España
| | | | - J M Morales Pérez
- Unidad de Gestión Clínica de Radiodiagnóstico, Hospital Universitario Virgen del Rocío, Sevilla, España
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Bai J, Shi J, Zhang S, Zhang C, Zhai Y, Wang S, Li M, Li C, Zhao P, Geng S, Gui S, Jing L, Zhang Y. MRI Signal Intensity and Electron Ultrastructure Classification Predict the Long-Term Outcome of Skull Base Chordomas. AJNR Am J Neuroradiol 2020; 41:852-858. [PMID: 32381547 DOI: 10.3174/ajnr.a6557] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 03/08/2020] [Indexed: 12/20/2022]
Abstract
BACKGROUND AND PURPOSE MR imaging is a useful and widely used evaluation for chordomas. Prior studies have classified chordomas into cell-dense type and matrix-rich type according to the ultrastructural features. However, the relationship between the MR imaging signal intensity and ultrastructural classification is unknown. We hypothesized that MR imaging signal intensity may predict both tumor ultrastructural classification and prognosis. MATERIALS AND METHODS Seventy-nine patients with skull base chordomas who underwent 95 operations were included in this retrospective single-center series. Preoperative tumor-to-pons MR imaging signal intensity ratios were calculated and designated as ratio on T1 FLAIR sequence (RT1), ratio on T2 sequence (RT2), and ratio on enhanced T1 FLAIR sequence (REN), respectively. We assessed the relationships among signal intensity ratios, ultrastructural classification, and survival. RESULTS Compared with the matrix-rich type group, the cell-dense type chordomas showed lower RT2 (cell-dense type: 1.90 ± 0.38; matrix-rich type: 2.61 ± 0.60 P < .001). The model of predicting cell-dense type based on RT2 had an area under the curve of 0.83 (95% CI, 0.75-0.92). In patients without radiation therapy, both progression-free survival (P = .003) and overall survival (P = .002) were longer in the matrix-rich type group than in the cell-dense type group. REN was a risk factor for progression-free survival (hazard ratio = 10.24; 95% CI, 1.73-60.79); RT2 was a protective factor for overall survival (hazard ratio = 0.33; 95% CI, 0.12-0.87); and REN was a risk factor for overall survival (hazard ratio = 4.76; 95% CI, 1.51-15.01). CONCLUSIONS The difference in MR imaging signal intensity in chordomas can be explained by electron microscopic features. Both signal intensity ratios and electron microscopic features may be prognostic factors.
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Affiliation(s)
- J Bai
- From the Department of Neurosurgery (J.B., P.Z., S. Geng, S. Gui, Y. Zhang), Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- Beijing Neurosurgical Institute (J.B., S.Z., C.Z., Y. Zhai, S.W., M.L., C.L., Y. Zhang), Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases (J.B., P.Z., S. Geng, S. Gui, Y. Zhang), Beijing, China
| | - J Shi
- Department of Neurosurgery (J.S.), Tsinghua University Yuquan Hospital, Beijing, China
| | - S Zhang
- Beijing Neurosurgical Institute (J.B., S.Z., C.Z., Y. Zhai, S.W., M.L., C.L., Y. Zhang), Capital Medical University, Beijing, China
- Department of Neurosurgery (S.Z.), Anshan Central Hospital, Anshan, China
| | - C Zhang
- Beijing Neurosurgical Institute (J.B., S.Z., C.Z., Y. Zhai, S.W., M.L., C.L., Y. Zhang), Capital Medical University, Beijing, China
| | - Y Zhai
- Beijing Neurosurgical Institute (J.B., S.Z., C.Z., Y. Zhai, S.W., M.L., C.L., Y. Zhang), Capital Medical University, Beijing, China
- Department of Neurosurgery (Y. Zhai), First Affiliated Hospital, Zhengzhou University, Zhengzhou, China
| | - S Wang
- Beijing Neurosurgical Institute (J.B., S.Z., C.Z., Y. Zhai, S.W., M.L., C.L., Y. Zhang), Capital Medical University, Beijing, China
| | - M Li
- Beijing Neurosurgical Institute (J.B., S.Z., C.Z., Y. Zhai, S.W., M.L., C.L., Y. Zhang), Capital Medical University, Beijing, China
| | - C Li
- Beijing Neurosurgical Institute (J.B., S.Z., C.Z., Y. Zhai, S.W., M.L., C.L., Y. Zhang), Capital Medical University, Beijing, China
| | - P Zhao
- From the Department of Neurosurgery (J.B., P.Z., S. Geng, S. Gui, Y. Zhang), Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases (J.B., P.Z., S. Geng, S. Gui, Y. Zhang), Beijing, China
| | - S Geng
- From the Department of Neurosurgery (J.B., P.Z., S. Geng, S. Gui, Y. Zhang), Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases (J.B., P.Z., S. Geng, S. Gui, Y. Zhang), Beijing, China
| | - S Gui
- From the Department of Neurosurgery (J.B., P.Z., S. Geng, S. Gui, Y. Zhang), Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases (J.B., P.Z., S. Geng, S. Gui, Y. Zhang), Beijing, China
| | - L Jing
- Department of Health Statistics (L.J.), Shanxi Medical University, Taiyuan, China
| | - Y Zhang
- From the Department of Neurosurgery (J.B., P.Z., S. Geng, S. Gui, Y. Zhang), Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- Beijing Neurosurgical Institute (J.B., S.Z., C.Z., Y. Zhai, S.W., M.L., C.L., Y. Zhang), Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases (J.B., P.Z., S. Geng, S. Gui, Y. Zhang), Beijing, China
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Rico Gala S, Calvo Gijón D, Sánchez Bernal ML, Fernández-Argüelles A, Bello Garrido A. Primary myxoid liposarcoma of the pelvis: An unusual location. Radiol Case Rep 2020; 15:431-434. [PMID: 32089761 PMCID: PMC7025956 DOI: 10.1016/j.radcr.2020.01.020] [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: 01/12/2020] [Accepted: 01/14/2020] [Indexed: 02/07/2023] Open
Abstract
Myxoid liposarcoma is the second most common type of liposarcoma, normally located in deep tissues of the lower extremities and rarely in the mesenchyma of abdomen and pelvis We present a patient who, incidentally, showed a large pelvis mass. CT and MR revealed a loculated lesión with hypodense areas and very high signal in T2 respectively as well as heterogeneous contrast enhancement. The imaging findings of pelvic myxoid liposarcoma are nonspecific, but nevertheless a painless mesenchymal mass should be considered when we see lesions of myxoid aspect in the pelvic area without a clear relationship with defined anatomic structures.
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Affiliation(s)
- Susana Rico Gala
- Department of Radiology, Hospital de Valme. Ctra de Cádiz s/n, C/ Angel Ganivet N° 12 Sevilla 41013 Spain
| | - Daniel Calvo Gijón
- Department of Radiology, Hospital de Valme. Ctra de Cádiz s/n, C/ Angel Ganivet N° 12 Sevilla 41013 Spain
| | | | - Amaya Fernández-Argüelles
- Department of Radiology, Hospital de Valme. Ctra de Cádiz s/n, C/ Angel Ganivet N° 12 Sevilla 41013 Spain
| | - Angela Bello Garrido
- Department of Radiology, Hospital de Valme. Ctra de Cádiz s/n, C/ Angel Ganivet N° 12 Sevilla 41013 Spain
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Can radiomics improve the prediction of metastatic relapse of myxoid/round cell liposarcomas? Eur Radiol 2020; 30:2413-2424. [PMID: 31953663 DOI: 10.1007/s00330-019-06562-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 10/24/2019] [Accepted: 10/30/2019] [Indexed: 10/25/2022]
Abstract
OBJECTIVE The strongest adverse prognostic factor in myxoid/round cell liposarcomas (MRC-LPS) is the presence of a round cell component above 5% within the tumor bulk. Its identification is underestimated on biopsies and in the neoadjuvant setting. The aim was to improve the prediction of patients' prognosis through a radiomics approach. METHODS Thirty-five out of 89 patients with MRC-LPS managed at our sarcoma reference center from 2008 to 2017 were included in this IRB-approved retrospective study as they presented with a pre-treatment contrast-enhanced MRI (median age, 49 years old). Two radiologists reported usual conventional/semantic radiological variables. After signal intensity (SI) normalization, voxel size standardization of T2-WI, and whole tumor volume segmentation, 44 3D-radiomics features were extracted. Using least absolute shrinkage and selection operator penalized Cox regression on prefiltered features, a radiomics score based on 3 weighted radiomics features was generated. Four prognostic multivariate models for MRFS were compared using concordance index: (1) clinical model, (2) semantic radiological model, (3) radiomics model, and (4) radiomics + semantic radiological model. RESULTS Twelve patients showed a metastatic relapse. The radiomics score included FOS_Skewness, GLRLM_LRHGE, and SHAPE_Volume and correlated with MRFS (hazard ratio = 19.37, p = 0.0009) and visual heterogeneity on T2-WI (p < 0.0001). A high score indicated a poorer prognosis. After adjustment, the best predictive performances were obtained with model (4) (concordance index = 0.937) and the lowest with model (1) (concordance index = 0.637). CONCLUSION Adding selected radiomics features that quantify tumor heterogeneity and shape at baseline to a conventional radiological analysis improves prediction of MRC-LPS patients' prognosis. KEY POINTS • Fourteen radiomics features quantifying shape and heterogeneity of myxoid/round cell liposarcomas on T2-WI were associated with metastatic relapse in univariate analysis. • A radiomics score based on 3 selected and weighted radiomics features was a strong and independent prognostic factor for metastatic relapse-free survival. • The best prediction of metastatic relapse-free survival for myxoid/round cell liposarcomas was achieved by combining the radiomics score to relevant radiological features.
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Kim DW, Jee YS. Solitary metastasis of myxoid liposarcoma from the thigh to intraperitoneum: a case report. World J Surg Oncol 2019; 17:172. [PMID: 31660994 PMCID: PMC6819342 DOI: 10.1186/s12957-019-1724-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 10/15/2019] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND The purpose of case report was to present a rare case of a solitary metastasis of myxoid liposarcoma and discuss the clinical and pathological information for patients treated for metastatic myxoid liposarcoma. CASE PRESENTATION We report our experience with a case of solitary metastasis of myxoid liposarcoma from the thigh to intraperitoneum. The patient was a 60-year-old man who was referred for abdominal discomfort and fatigue. Enhanced computed tomography showed a 25-cm intra-abdominal tumor. He had undergone a wide local excision for a right thigh myxoid liposarcoma 6 years earlier. At laparotomy, a huge multi-lobular cystic mass was identified at the small bowel mesentery. Wide local excision was performed, and the mass was diagnosed as metastatic myxoid liposarcoma. He was discharged without postoperative complications. CONCLUSIONS We experienced a single intraperitoneal metastasis in a patient with myxoid liposarcoma after radical surgery of the primary site.
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Affiliation(s)
- Dong-Wook Kim
- Department of Surgery, Dankook University College of Medicine, 201 Manghyangro, Dongnam-gu, Cheonan, 31116, Republic of Korea
| | - Ye Seob Jee
- Department of Surgery, Dankook University College of Medicine, 201 Manghyangro, Dongnam-gu, Cheonan, 31116, Republic of Korea.
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Short tau inversion recovery magnetic resonance imaging for staging and screening in myxoid liposarcoma. J Orthop 2019; 16:206-210. [PMID: 30906124 DOI: 10.1016/j.jor.2019.02.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Accepted: 02/17/2019] [Indexed: 11/24/2022] Open
Abstract
Purpose Myxoid liposarcoma has a propensity to metastasize to bone. MRI is the preferred modality for detecting bone disease. We evaluated multiple MRI sequences to determine an optimal screening method. Methods Whole body MRI was performed on all patients. The number and locations of metastases found by imaging and round cell component of the sites sampled were evaluated. Results We found a total of 68 osseous lesions. Whole body MRI utilizing STIR only sequences decreased imaging time by 83.6% and demonstrated the lesions the best. Conclusions STIR sequences can be exclusively used during staging and screening of myxoid liposarcoma.
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18F-FDG PET/CT and MRI features of myxoid liposarcomas and intramuscular myxomas. Skeletal Radiol 2018; 47:1641-1650. [PMID: 29926115 DOI: 10.1007/s00256-018-3000-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 05/30/2018] [Accepted: 06/01/2018] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To examine the imaging characteristics of intramuscular myxomas (IM) and myxoid liposarcomas (MLS) on 18F-FDG PET/CT and MRI. MATERIALS AND METHODS With IRB approval, our institutional imaging database was searched for pathologically proven IM and MLS evaluated by 18F-FDG PET/CT and MRI. PET/CT and MRI imaging characteristics were recorded and correlated with pathologic diagnosis. RESULTS We found eight patients (2 M, 6 F) with IM (mean age 65.6 ± 10.4 years) and 16 patients (7 F, 9 M) with MLS (mean age 42.8 ± 16.3 years). MRI was available in 7/8 IM and 15/16 MLS patients. There was no significant difference between the two groups in SUVmax (IM 2.7 ± 0.8, MLS 3.0 ± 1.0; p = 0.35), SUVmean (1.7 ± 0.4, 1.5 ± 0.5; p = 0.40), total lesion glycolysis (101.8 ± 127.3, 2420.2 ± 4003.3 cm3*g/ml; p = 0.12), metabolic tumor volume (62.3 ± 71.1, 1742.9 ± 3308.0 cm3; p = 0.17) or CT attenuation (p = 0.70). MLS occurred in younger patients (p = 0.0015), were larger (16.4 ± 8.2 vs. 5.6 ± 2.5 cm; p = 0.0015), more often T1 hyperintense (p = 0.03), with nodular enhancement (p = 0.006), and macroscopic fat on CT (p = 0.0013) and MRI (p = < 0.001) compared to myxomas. CONCLUSIONS IM and MLS most commonly demonstrate low-grade FDG activity and overlapping metabolic measures on PET/CT. MRI is useful in differentiation, but MLS can present without macroscopic fat on MRI, underscoring the importance of radiologic-pathologic correlation for accurate diagnosis.
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Abaricia S, Hirbe AC. Diagnosis and Treatment of Myxoid Liposarcomas: Histology Matters. Curr Treat Options Oncol 2018; 19:64. [DOI: 10.1007/s11864-018-0590-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Kuyumcu G, Rubin BP, Bullen J, Ilaslan H. Quantification of fat content in lipid-rich myxoid liposarcomas with MRI: a single-center experience with survival analysis. Skeletal Radiol 2018; 47:1411-1417. [PMID: 29948035 DOI: 10.1007/s00256-018-2974-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Revised: 05/01/2018] [Accepted: 05/08/2018] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To determine the fat content of myxoid liposarcomas (MLS) on MRI and to identify any association between lipid content and survival. MATERIALS AND METHODS The fat percentage of MLS diagnosed between January 2006 and December 2016 at a single institution was assessed by two radiologists on preoperative MR images. A Cox proportional hazard model was used to determine any association between tumor fat percentage and survival time. Tumor fat percentage was the single predictor in the model. A significance level of 0.05 was used. The Kaplan-Meier estimator was also used to provide a nonparametric estimate of the survivor function within the entire sample and within two patient subgroups consists of lipid-rich and lipid-poor tumors. Lipid-rich tumors were defined as any tumors showing more than 20% of fat on MRI. A 20% cutoff was determined arbitrarily. RESULTS Of the 43 cases identified through retrospective review, 8 tumors demonstrated ≥10% fat on MRI, and 4 tumors demonstrated ≥20% fat (highest fat percentage, 38%). There was no significant survival difference between patients with high tumor fat, which was defined as ≥20% fat, compared with those with little to no tumor fat. CONCLUSION Myxoid liposarcomas may demonstrate a higher fat content on MRI than has previously been reported in the literature. Increased tumor fat percentage in lipid-rich tumors was not found to be associated with increased risk of death. Radiologists must be aware of the existence of MLS lesions with higher fat content.
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Affiliation(s)
- Gokhan Kuyumcu
- Imaging Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH, 44195, USA.
| | - Brian P Rubin
- Robert J. Tomsich Pathology and Laboratory Medicine Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH, 44195, USA
| | - Jennifer Bullen
- Department of Quantitative Health Sciences, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH, 44195, USA
| | - Hakan Ilaslan
- Imaging Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH, 44195, USA
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Jagannathan JP, Tirumani SH, Ramaiya NH. Imaging in Soft Tissue Sarcomas: Current Updates. Surg Oncol Clin N Am 2018; 25:645-75. [PMID: 27591491 DOI: 10.1016/j.soc.2016.05.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Soft tissue sarcomas (STS) are heterogeneous malignant tumors that have nonspecific imaging features. A combination of clinical, demographic, and imaging characteristics can aid in the diagnosis. Imaging provides important information regarding the tumor extent, pretreatment planning, and surveillance of patients with STS. In this article, we illustrate the pertinent imaging characteristics of the commonly occurring STS and some uncommon sarcomas with unique imaging characteristics.
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Affiliation(s)
- Jyothi P Jagannathan
- Department of Imaging, Dana-Farber Cancer Institute, Harvard Medical School, 450 Brookline Avenue, Boston, MA 02215, USA; Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA.
| | - Sree Harsha Tirumani
- Department of Imaging, Dana-Farber Cancer Institute, Harvard Medical School, 450 Brookline Avenue, Boston, MA 02215, USA; Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA
| | - Nikhil H Ramaiya
- Department of Imaging, Dana-Farber Cancer Institute, Harvard Medical School, 450 Brookline Avenue, Boston, MA 02215, USA; Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA
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16
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Rosenberg M, Groth JV, Taljanovic MS, Mar WA. Myxoid-round cell liposarcoma: MRI appearance after radiation therapy and relationship to response. Radiol Case Rep 2018; 12:811-814. [PMID: 29484077 PMCID: PMC5823305 DOI: 10.1016/j.radcr.2017.06.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 06/26/2017] [Indexed: 11/30/2022] Open
Abstract
Liposarcomas are classified into 4 different subtypes, with the myxoid-round cell variant demonstrating increased morbidity and metastatic potential dependent on cell composition. Unique to sarcomas, the myxoid-round cell liposarcoma is remarkably sensitive to radiation therapy in the pretreatment setting, owing to the tumor morphology and vascular distribution. Herein we report a case of myxoid-round cell liposarcoma within the deep soft tissues of the thigh of an 81-year-old male with excellent neoadjuvant response to radiation. We briefly review treatment options.
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Affiliation(s)
- Michael Rosenberg
- Department of Radiology, University of Illinois Hospital & Health Sciences System, 1740 West Taylor Street, Suite 2600, Chicago, IL 60612
| | - John V Groth
- Department of Pathology, University of Illinois Hospital & Health Sciences System, Third Floor, 1740 W. Taylor St., Chicago, IL 60612
| | - Mihra S Taljanovic
- Department of Medical Imaging, College of Medicine, Banner- University Medical Center, University of Arizona, 1501 N. Campbell Ave., P.O. Box 245067, Tucson, AZ 85724
| | - Winnie A Mar
- Department of Radiology, University of Illinois Hospital & Health Sciences System, 1740 West Taylor Street, Suite 2600, Chicago, IL 60612
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Gimber LH, Montgomery EA, Morris CD, Krupinski EA, Fayad LM. MRI characteristics associated with high-grade myxoid liposarcoma. Clin Radiol 2017; 72:613.e1-613.e6. [PMID: 28256200 DOI: 10.1016/j.crad.2017.01.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 11/28/2016] [Accepted: 01/30/2017] [Indexed: 10/20/2022]
Abstract
AIM To identify magnetic resonance imaging (MRI) features differentiating high-grade (>5% round-cell component) from low-grade myxoid liposarcomas (LPS) (≤5% round-cell component). MATERIALS AND METHODS Informed consent was waived. Patients with myxoid LPS and MRI before biopsy, neoadjuvant therapy, and surgery were included retrospectively. High-grade components were recorded from histological specimens by a pathologist (24 years of experience). Images were evaluated by a senior radiologist (>12 years of experience) for tumour size, location, tissue layer, and MRI features (signal intensity, heterogeneity, margin, and perilesional characteristics). Descriptive statistics, Fisher's exact test to identify associations with a round-cell component, and multivariate logistic regression to identify independent predictors of high-grade tumours were used. RESULTS Thirty-one patients (16 women [mean 51.1 years; range 19-79 years] and 15 men [mean 45.5 years; range 18-95 years]) with myxoid LPS (23 low-grade, eight high-grade) were included. All high-grade lesions had lipid signal, a peritumoural capsule and peritumoural contrast enhancement, and more commonly exhibited heterogeneous signal; however, the average size of ≥10 cm was the strongest independent indicator of high-grade status (odds ratio [OR], 14.6; 95% confidence interval [CI]: 1.6, 131). CONCLUSION Size ≥10 cm is most strongly associated with high-grade myxoid LPS (round-cell component >5%). Other features possibly differentiating high-grade from low-grade status include lesion margin, lipid signal, and perilesional characteristics.
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Affiliation(s)
- L H Gimber
- Department of Medical Imaging, The University of Arizona, College of Medicine, Banner - University Medical Center, 1501 N Campbell Ave., P.O. Box 245067, Tucson, AZ 85724, USA.
| | - E A Montgomery
- Department of Pathology, The Johns Hopkins University, Weinberg Bldg, Rm. 2242, 401 North Broadway, Baltimore, MD 21231, USA
| | - C D Morris
- Department of Orthopaedic Surgery, Johns Hopkins Medicine, 601 N Caroline St, Baltimore, MD 21287, USA
| | - E A Krupinski
- Department of Radiology & Imaging Sciences, Emory University, 1364 Clifton Rd NE D107, Atlanta, GA 30322, USA
| | - L M Fayad
- The Russell H. Morgan Department of Radiology & Radiological Science, The Johns Hopkins University School of Medicine, 601 North Wolfe Street, Baltimore, MD 21287, USA
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18
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Primary Extremity Liposarcoma: MRI Features, Histopathology, and Clinical Outcomes. J Comput Assist Tomogr 2017; 40:791-8. [PMID: 27224232 DOI: 10.1097/rct.0000000000000431] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVE This study aimed to describe magnetic resonance imaging (MRI) features of extremity liposarcoma (LPS) subtypes, correlating with histopathology and clinical outcomes. METHODS In this retrospective study, we included 125 patients (80 men, 45 women; mean age, 53 years) with extremity LPS [23 atypical lipomatous tumor (ALT), 9 dedifferentiated (DDLPS), 70 myxoid (MLPS), 23 pleomorphic (PLPS)]. Pretreatment MRI of primary tumors in 56 patients (10 ALT, 4 DDLPS, 28 MLPS, 14 PLPS) was reviewed. RESULTS All subtypes were predominantly T1 isointense relative to skeletal muscle (DDLPS = 3/4, MLPS = 28/28, PLPS = 13/14) and T2 hyperintense (ALT = 10/10, DDLPS = 3/4, MLPS = 28/28, PLPS = 14/14) except for ALT which were T1 hyperintense (8/10). Within MLPS, high grade was associated with unencapsulated margins (P = 0.05) and solid, nodular enhancement (P < 0.0001). Peritumoral edema (P = 0.03) and T2 heterogeneity (P = 0.05) predicted pulmonary (rather than extrapulmonary) metastases in MLPS. Tumor subtype correlated with mortality (P = 0.04). CONCLUSIONS The MRI features can help to distinguish between extremity LPS subtypes, and can predict histopathologic grade and metastatic pattern in myxoid LPS.
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Abstract
INTRODUCTION Myxoid liposarcoma is the only translocation-associated liposarcoma subtype. It classically originates in the deep soft tissues of the thigh. At distal sites of the extremities, this tumor is exceedingly rare. We present a series of 8 cases occurring in the foot/ankle. RESULTS Two female and 6 male patients, aged between 32 and 77 years (mean, 54.3 years), were identified. Tumor size ranged from 1.1 to 10 cm (mean, 6.8 cm). Two lesions eroded bone. All tumors were treated by excision and 7 by (neo)adjuvant radiotherapy. R0 status was reached in 2 cases with 1 case followed by metastasis in the groin. All other cases were documented with R1 (n=2) or R2 (n=4) resection status. In 1 patient, the follow-up status was unknown. All other patients were alive 15-135 (mean, 55.8) months after initial diagnosis. We conclude that myxoid liposarcoma at acral sites are exceedingly rare, and in this series, prognosis was good irrespective of resection status. Clinicians and pathologists have to be aware because this sarcoma type shows a peculiar clinical behavior with high radio- and chemosensitivity and metastatic spread to extrapulmonary sites.
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20
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Rizer M, Singer AD, Edgar M, Jose J, Subhawong TK. The histological variants of liposarcoma: predictive MRI findings with prognostic implications, management, follow-up, and differential diagnosis. Skeletal Radiol 2016; 45:1193-204. [PMID: 27209201 DOI: 10.1007/s00256-016-2409-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 05/01/2016] [Accepted: 05/05/2016] [Indexed: 02/07/2023]
Abstract
Liposarcoma is the single most common soft tissue sarcoma accounting for up to 35 % of sarcomas. It represents a histologically diverse group of soft tissue tumors that demonstrate a wide range of imaging appearances with varied behavior patterns. Correspondingly, more aggressive histological subtypes often require management that includes a combination of surgery, chemotherapy, and radiation therapy. Distinguishing among liposarcoma subtypes has important therapeutic and prognostic implications. In this manuscript, we review the liposarcoma subtypes and their histologic and MRI findings, prognostic implications, and differential diagnostic considerations.
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Affiliation(s)
- Magda Rizer
- Department of Radiology, Mount Sinai Medical Center, Miami Beach, FL, USA.
| | - Adam D Singer
- Department of Radiology and Imaging Sciences, Section of Musculoskeletal Imaging, Emory Healthcare, Atlanta, GA, USA
| | - Mark Edgar
- Bone and Soft Tissue Pathology, Department of Pathology, Emory Healthcare, Atlanta, GA, USA
| | - Jean Jose
- Section of Musculoskeletal Imaging, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Ty K Subhawong
- Section of Musculoskeletal Imaging, Miller School of Medicine, University of Miami, Miami, FL, USA
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21
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Myxoid soft-tissue neoplasms: comprehensive update of the taxonomy and MRI features. AJR Am J Roentgenol 2015; 204:374-85. [PMID: 25615761 DOI: 10.2214/ajr.14.12888] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVE. The purpose of this article is to review the classification, clinical presentation, and histopathologic and MRI features of myxoid soft-tissue neoplasms. CONCLUSION. MRI is the modality of choice for characterization of myxoid soft-tissue tumors. A combination of imaging features (including certain characteristic signs), clinical features, and patient demographics can help the radiologist in coming to a specific diagnosis or in narrowing down the differential diagnoses.
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22
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Lemeur M, Mattei JC, Souteyrand P, Chagnaud C, Curvale G, Rochwerger A. Prognostic factors for the recurrence of myxoid liposarcoma: 20 cases with up to 8 years follow-up. Orthop Traumatol Surg Res 2015; 101:103-7. [PMID: 25583234 DOI: 10.1016/j.otsr.2014.09.024] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Revised: 09/10/2014] [Accepted: 09/29/2014] [Indexed: 02/02/2023]
Abstract
INTRODUCTION Myxoid liposarcomas (MLS) are the second most common type of liposarcoma. Although some MRI findings are distinctively characteristics of MLS, the diagnosis can be tricky in tumors with a large portion of round cells (RC). Known predictors of an unfavorable outcome include age, tumor size, high RC content and positive resection margins. The goal of this retrospective study was to define prognostic factors for recurrence, with special emphasis on the percentage of RCs and medical care provided in a non-specialized center. PATIENTS AND METHODS Twenty patients (11 women, 9 men) with a mean age of 44.3 years (18-73) were reviewed after a mean of 55.9 months. Six of these patients had been operated at a non-specialized center. The diagnostic MRI was read by a specialized radiologist and the resection procedures performed by two specialized surgeons. Tumors were labeled as either "pure myxoid liposarcoma" or "myxoid/round-cell liposarcoma". The local recurrence-free survival rate and mortality rate were calculated. RESULTS Fifteen patients had undergone an MRI during the initial assessment. The typical MRI findings of MLS were present in four of them. The MRI suggested a non-specific lesion in the other 11 patients. After correlation with pathology findings, these tumors contained more than 5% round cells. The fourteen patients treated at our facility had undergone a biopsy, while none of the ones treated outside did. Five patients had R0 resection margins and 15 had R1 margins. Prognostic factors for recurrence consisted of age, tumor size >10 cm, R1 resection margins, FNCLCC grade 2+R1 margins, medical care at a non-specialized center, and >5% round cells. There were eight local recurrences and three metastases (15%). Two patients died (90% overall survival rate). DISCUSSION The risk of local recurrence was 3.86 times greater in this study when the tumor contained more than 5% RCs, which is consistent with published data. The MLS diagnosis was made only four times based on the initial MRI because misleading nature of high RC tumors. R1 resection margins are a risk factor for local recurrence. However, cases with R1 margins have a recurrence rate that is similar to R0 cases when the surgery is performed at a specialized cancer center. Treatment of MLS in a non-specialized center is a key negative prognostic factor. The reported rate of metastasis varies. Atypical extrapulmonary localizations are common, and often multifocal. MRI has been shown to be superior at detecting secondary lesions and some have suggested that a full-body MRI should be performed. CONCLUSION Prognostic factors for the recurrence of myxoid liposarcomas have been identified. MRI analysis is not definitive and must be supplemented by a biopsy.
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Affiliation(s)
- M Lemeur
- Service de chirurgie orthopédique, traumatologique et des tumeurs musculo-squelettiques du Pr Curvale, hôpital Nord, chemin des Bourrely, 13915 Marseille cedex 20, France
| | - J-C Mattei
- Service de chirurgie orthopédique, traumatologique et des tumeurs musculo-squelettiques du Pr Curvale, hôpital Nord, chemin des Bourrely, 13915 Marseille cedex 20, France.
| | - P Souteyrand
- Service de radiologie du Pr Chagnaud, hôpital de la Conception, 147, boulevard Baille, 13005 Marseille, France
| | - C Chagnaud
- Service de radiologie du Pr Chagnaud, hôpital de la Conception, 147, boulevard Baille, 13005 Marseille, France
| | - G Curvale
- Service de chirurgie orthopédique, traumatologique et des tumeurs musculo-squelettiques du Pr Curvale, hôpital Nord, chemin des Bourrely, 13915 Marseille cedex 20, France
| | - A Rochwerger
- Service de chirurgie orthopédique, traumatologique et des tumeurs musculo-squelettiques du Pr Curvale, hôpital Nord, chemin des Bourrely, 13915 Marseille cedex 20, France
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23
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Zhuang KD, Tandon AA, Ho BCS, Chong BK. MRI features of soft-tissue lumps and bumps. Clin Radiol 2014; 69:e568-83. [PMID: 25256016 DOI: 10.1016/j.crad.2014.08.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2014] [Revised: 08/18/2014] [Accepted: 08/20/2014] [Indexed: 12/28/2022]
Affiliation(s)
- K D Zhuang
- Department of Diagnostic Radiology, Tan Tock Seng Hospital, Singapore.
| | - A A Tandon
- Department of Diagnostic Radiology, Tan Tock Seng Hospital, Singapore
| | - B C S Ho
- Department of Pathology, Tan Tock Seng Hospital, Singapore
| | - B K Chong
- Department of Diagnostic Radiology, Tan Tock Seng Hospital, Singapore
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24
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Löwenthal D, Zeile M, Niederhagen M, Fehlberg S, Schnapauff D, Pink D, Tunn PU, Reichardt P, Hamm B, Dudeck O. Differentiation of myxoid liposarcoma by magnetic resonance imaging: a histopathologic correlation. Acta Radiol 2014; 55:952-60. [PMID: 24123962 DOI: 10.1177/0284185113508114] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Myxoid liposarcomas represent a heterogeneous group of soft tissue tumors in which prognosis is dependent on differentiation. PURPOSE To identify magnetic resonance imaging (MRI) criteria to distinguish low-grade from high-grade myxoid liposarcomas. MATERIAL AND METHODS MR images of 30 histologically proven myxoid liposarcomas were retrospectively reviewed. Tumors were evaluated according to size, localization, tumor border, and structure as well as tumor composition. These imaging criteria were correlated with histopathological findings. RESULTS Nineteen myxoid liposarcomas were histologically classified as low-grade myxoid liposarcomas, whereas 11 were considered high-grade myxoid liposarcomas. Mean tumor volume of low-grade myxoid liposarcomas (710.1 ± 960.1 ccm) was significantly smaller as compared to high-grade myxoid liposarcomas (2737.0 ± 3423.7 ccm; P = 0.04). In addition to necrotic areas, three tumor components - fatty, myxoid, as well as contrast-enhancing non-fatty, non-myxoid - could be identified. The mean fraction of fatty tumor areas in low-grade myxoid liposarcomas was 10 ± 11% as compared to 6 ± 4% for high-grade myxoid liposarcomas (P = 0.66). Myxoid components accounted for 88 ± 16% in low-grade myxoid liposarcomas, but only for 45 ± 25% in high-grade myxoid liposarcomas (P < 0.0001). The non-fatty, non-myxoid tumor fraction was significantly higher in high-grade myxoid liposarcomas (50 ± 25%) as compared to low-grade myxoid liposarcomas (2 ± 9%; P < 0.0001). A proportion of > 5% of this tumor fraction was found to be a precise unique predictor for high-grade myxoid liposarcomas with a sensitivity of 100% and a specificity of 95%. CONCLUSION Tumor components with contrast-enhancing non-fatty, non-myxoid imaging features were predominantly found in high-grade myxoid liposarcomas, which may histologically resemble round cell clusters.
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Affiliation(s)
- D Löwenthal
- Department of Radiology and Nuclear Medicine, Otto-von-Guericke University, Magdeburg, Germany
| | - M Zeile
- Department of Radiology, Hospital Reinbek, Reinbek, Germany
| | - M Niederhagen
- Dr. Senckenbergisches Institute for Pathology, University Hospital Frankfurt, Frankfurt, Germany
| | - S Fehlberg
- Department of Orthopedic Oncology, Sarcoma Center Berlin-Brandenburg, Helios Klinikum Berlin-Buch, Berlin, Germany
| | - D Schnapauff
- Department of Radiology, Charite Universitätsmedizin, Berlin, Germany
| | - D Pink
- Department of Hematology, Oncology and Palliative Care, Sarcoma Center Berlin-Brandenburg, Helios Klinikum Bad Saarow, Bad Saarow, Germany
| | - PU Tunn
- Department of Orthopedic Oncology, Sarcoma Center Berlin-Brandenburg, Helios Klinikum Berlin-Buch, Berlin, Germany
| | - P Reichardt
- Department of Hematology, Oncology and Palliative Care, Sarcoma Center Berlin-Brandenburg, Helios Klinikum Bad Saarow, Bad Saarow, Germany
| | - B Hamm
- Department of Radiology, Charite Universitätsmedizin, Berlin, Germany
| | - O Dudeck
- Department of Radiology and Nuclear Medicine, Otto-von-Guericke University, Magdeburg, Germany
- Department of Radiology, Charite Universitätsmedizin, Berlin, Germany
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25
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Kudo H, Inaoka T, Tokuyama W, Hiruta N, Nakagawa K, Hayashi A, Terada H. Round cell liposarcoma arising in the left foot: MRI and PET findings. Jpn J Radiol 2012; 30:852-7. [DOI: 10.1007/s11604-012-0119-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2012] [Accepted: 08/09/2012] [Indexed: 02/07/2023]
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26
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Walker EA, Salesky JS, Fenton ME, Murphey MD. Magnetic resonance imaging of malignant soft tissue neoplasms in the adult. Radiol Clin North Am 2011; 49:1219-34, vi. [PMID: 22024296 DOI: 10.1016/j.rcl.2011.07.006] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
This review addresses the spectrum of malignant soft tissue tumors frequently found in adults. Rather than presenting a complete review, the focus of this discussion is on common lesions or lesions in which the diagnosis may be suggested on the basis of imaging. Diagnoses covered include undifferentiated high-grade pleomorphic sarcoma, fibrosarcoma, dermatofibrosarcoma protuberans, liposarcoma, synovial sarcoma, malignant peripheral nerve sheath tumor, clear cell sarcoma, hemangioendothelioma, hemangiopericytoma, angiosarcoma, and leiomyosarcoma.
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Affiliation(s)
- Eric A Walker
- Department of Radiology, Milton S. Hershey Medical Center, 500 University Drive, P.O. Box 850, Hershey, PA 17033, USA.
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27
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Walker EA, Song AJ, Murphey MD. Magnetic resonance imaging of soft-tissue masses. Semin Roentgenol 2010; 45:277-97. [PMID: 20727455 DOI: 10.1053/j.ro.2009.12.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Eric A Walker
- Departments of Radiology and Nuclear Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.
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28
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Wu JS, Hochman MG. Soft-tissue tumors and tumorlike lesions: a systematic imaging approach. Radiology 2009; 253:297-316. [PMID: 19864525 DOI: 10.1148/radiol.2532081199] [Citation(s) in RCA: 170] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Soft-tissue lesions are frequently encountered by radiologists in everyday clinical practice. Characterization of these soft-tissue lesions remains problematic, despite advances in imaging. By systematically using clinical history, lesion location, mineralization on radiographs, and signal intensity characteristics on magnetic resonance images, one can (a) determine the diagnosis for the subset of determinate lesions that have characteristic clinical and imaging features and (b) narrow the differential diagnosis for lesions that demonstrate indeterminate characteristics. If a lesion cannot be characterized as a benign entity, the lesion should be reported as indeterminate, and the patient should undergo biopsy to exclude malignancy.
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Affiliation(s)
- Jim S Wu
- Department of Radiology, Section of Musculoskeletal Imaging, Beth Israel Deaconess Medical Center, 330 Brookline Ave, Boston, MA 02215, USA.
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29
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Bidault F, Vanel D, Terrier P, Jalaguier A, Bonvalot S, Pedeutour F, Couturier JM, Dromain C. Liposarcoma or lipoma: does genetics change classic imaging criteria? Eur J Radiol 2009; 72:22-6. [PMID: 19525076 DOI: 10.1016/j.ejrad.2009.05.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2009] [Accepted: 05/04/2009] [Indexed: 02/07/2023]
Abstract
Differentiating benign from malignant fatty tumours has always been very difficult for both radiologists and pathologists. Cytogenetic and molecular genetic analyses provide complementary tools for differentiating soft tissue tumours. Our objective was to compare imaging criteria of malignancy with a new diagnostic gold standard, namely, pathological analysis combined with cytogenetic and molecular genetic analyses. Nineteen patients with a fatty tumour were included. All had computed tomography and/or magnetic resonance imaging examination before any biopsy or surgery. All had histopathological and cytogenetic and/or molecular genetic analyses. The imaging diagnosis of benign or malignant lesions was accurate in 15 cases, with 4 false positives for malignancy. Erroneous criteria were a large size (4 cases), and a mass that was not purely fatty. In conclusion, the main pitfall for a false positive radiological diagnosis of liposarcoma is certainly a large-sized tumour. Cytogenetic and molecular genetic analyses contribute to the diagnosis and can be performed at the same time with a core biopsy.
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Affiliation(s)
- F Bidault
- Department of Radiology, Institut Gustave-Roussy, 39 rue Camille Desmoulins, 94805 Villejuif, France.
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30
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Murphey MD, Arcara LK, Fanburg-Smith J. From the archives of the AFIP: imaging of musculoskeletal liposarcoma with radiologic-pathologic correlation. Radiographics 2006; 25:1371-95. [PMID: 16160117 DOI: 10.1148/rg.255055106] [Citation(s) in RCA: 216] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Liposarcoma is the second most common type of soft-tissue sarcoma, accounting for 10%-35% of these lesions. The World Health Organization has categorized soft-tissue liposarcomas into five distinct histologic subtypes: well differentiated, dedifferentiated, myxoid, pleomorphic, and mixed type. Well-differentiated liposarcomas frequently demonstrate a diagnostic appearance on computed tomographic (CT) or magnetic resonance (MR) images, with a largely lipomatous mass (>75% of the lesion) and nonlipomatous components in thick septa or focal nodules. The CT or MR imaging finding of a nodular dominant focus (>1 cm in size) of nonlipomatous tissue in a well-differentiated liposarcoma suggests dedifferentiated liposarcoma, and biopsy should be directed at the nonadipose component. The high water content of myxoid liposarcoma seen at pathologic analysis and constituting the majority of the lesion is reflected at sonography, CT, and MR imaging. However, the detection of a small amount of adipose tissue in the septa or as small nodular foci superimposed on the background of myxoid tissue allows prospective diagnosis in 78%-95% of myxoid liposarcomas. Pleomorphic liposarcomas are high-grade sarcomatous lesions and typically appear as heterogeneous soft-tissue masses, although small amounts of fat are seen on MR images in 62%-75% of cases, findings that suggest the diagnosis. Mixed-type liposarcomas have features representing a combination of the other subtypes. Primary liposarcoma of bone is exceedingly rare and usually demonstrates aggressive nonspecific features, although fat may be seen. Understanding and recognition of the spectrum of appearances of the various types of musculoskeletal liposarcoma, which reflect their underlying pathologic characteristics, improves radiologic assessment and is vital for optimal patient management.
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Affiliation(s)
- Mark D Murphey
- Department of Radiologic Pathology, Armed Forces Institute of Pathology, 6825 16th St NW, Bldg 54, Rm M-133A, Washington, DC 20306, USA.
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31
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Tateishi U, Hasegawa T, Onaya H, Satake M, Arai Y, Moriyama N. Myxoinflammatory Fibroblastic Sarcoma: MR Appearance and Pathologic Correlation. AJR Am J Roentgenol 2005; 184:1749-53. [PMID: 15908525 DOI: 10.2214/ajr.184.6.01841749] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVE The purpose of our study was to define the MR appearance of myxoinflammatory fibroblastic sarcoma of the soft tissues and to make correlations with the histopathologic features. CONCLUSION Myxoinflammatory fibroblastic sarcoma is an uncommon malignancy that typically affects adult subjects, who present with painless swelling. This lesion manifests on MR images as a poorly circumscribed mass involving the underlying tendon sheath in the distal extremities.
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Affiliation(s)
- Ukihide Tateishi
- Division of Diagnostic Radiology, National Cancer Center Hospital and Institute, Tsukiji, Chuo-Ku, 104-0045, Tokyo, Japan
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