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Ioakeim-Ioannidou M, Rose M, Chen YL, MacDonald SM. The Use of Proton and Carbon Ion Radiation Therapy for Sarcomas. Semin Radiat Oncol 2024; 34:207-217. [PMID: 38508785 DOI: 10.1016/j.semradonc.2024.02.003] [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: 03/22/2024]
Abstract
The unique physical and biological characteristics of proton and carbon ions allow for improved sparing of normal tissues, decreased integral dose to the body, and increased biological effect through high linear energy transfer. These properties are particularly useful for sarcomas given their histology, wide array of locations, and age of diagnosis. This review summarizes the literature and describes the clinical situations in which these heavy particles have advantages for treating sarcomas.
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Affiliation(s)
| | - Melanie Rose
- Department of Radiation Oncology, Dartmouth Hitchcock Medical Center, Lebanon, NH
| | - Yen-Lin Chen
- Department of Radiation Oncology, Massachusetts General Hospital, Boston, MA
| | - Shannon M MacDonald
- Department of Radiation Oncology, Massachusetts General Hospital, Boston, MA.
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2
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Reyes M, Kayne A, Collopy S, Prashant G, Kelly P, Evans JJ. Multifocal Ectopic Recurrence of a C2 Chordoma. J Neurol Surg Rep 2023; 84:e146-e155. [PMID: 38026145 PMCID: PMC10673705 DOI: 10.1055/s-0043-1777073] [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: 01/24/2023] [Accepted: 08/21/2023] [Indexed: 12/01/2023] Open
Abstract
Background Chordomas are histologically benign but locally aggressive tumors with a high propensity to recur. Our case highlights the importance of long-term vigilance in patients who have undergone chordoma resection. Case Report We report the case of a 47-year-old man with a cervical chordoma who developed multiple musculoskeletal ectopic recurrences in the left supraclavicular region, the proximal right bicep, and the left submandibular region without recurrence in the primary tumor site. Primary tumor resection was achieved via a combination of surgery, adjuvant radiation therapy, and imatinib. All recurrences were successfully resected and confirmed via pathology to be ectopic chordoma. Discussion Ectopic recurrence of cervical chordoma is rare and lung is the most common site of distant spread. Chordoma recurrence in skeletal muscle is particularly rare, with only 10 cases described in the literature. A plausible mechanism of distant metastatic disease in chordoma patients suggests that tumor cells escape the surgical tract via a combination of cytokine release, vasodilation, and microtrauma induced during resection. Conclusion Cervical chordoma with ectopic recurrence in skeletal muscle has not been previously described in the literature. Skull base surgeons should be aware of the phenomenon of chordoma ectopic recurrence in the absence of local recurrence.
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Affiliation(s)
- Maikerly Reyes
- Department of Neurological Surgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, United States
| | - Allison Kayne
- Department of Neurological Surgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, United States
| | - Sarah Collopy
- Department of Neurological Surgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, United States
| | - Giyarpuram Prashant
- Department of Neurological Surgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, United States
| | - Patrick Kelly
- Department of Neurological Surgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, United States
| | - James J. Evans
- Department of Neurological Surgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, United States
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Stevens AR, Branstetter BF, Gardner P, Pearce TM, Zenonos GA, Arani K. Ecchordosis Physaliphora: Does It Even Exist? AJNR Am J Neuroradiol 2023; 44:889-893. [PMID: 37442592 PMCID: PMC10411852 DOI: 10.3174/ajnr.a7932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 06/08/2023] [Indexed: 07/15/2023]
Abstract
The term ecchordosis physaliphora (EP) has been used historically to describe a benign notochordal remnant with no growth potential, most commonly occuring in the central clivus. Unfortunately, the radiologic appearance of EP overlaps considerably with the appearance of low-grade chordomas, which do have the potential for growth. In this article, we review new pathologic terminology that better describes this family of diseases, and we propose new radiologic terms that better address the uncertainty of the radiologic diagnosis. The surgical importance of accurate terminology and the implications for patient care are discussed.
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Affiliation(s)
- A R Stevens
- From the Lake Erie College of Osteopathic Medicine (A.R.S.), Erie, Pennsylvania
| | - B F Branstetter
- Departments of Radiology (B.F.B., K.A.)
- Otolaryngology (B.F.B.)
| | | | - T M Pearce
- Pathology (T.M.P.), University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | | | - K Arani
- Departments of Radiology (B.F.B., K.A.)
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4
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Advances in the development of chordoma models for drug discovery and precision medicine. Biochim Biophys Acta Rev Cancer 2022; 1877:188812. [DOI: 10.1016/j.bbcan.2022.188812] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 08/31/2022] [Accepted: 09/28/2022] [Indexed: 12/24/2022]
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5
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Banfield W, Ioakeim-Ioannidou M, Goldberg S, Ahmed S, Schwab J, Cote G, Choy E, Shin J, Hornicek F, Liebsch N, Chen Y, MacDonald SM, DeLaney T. Definitive high-dose, proton-based radiation for unresected mobile spine and sacral chordomas. Radiother Oncol 2022; 171:139-145. [DOI: 10.1016/j.radonc.2022.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 03/18/2022] [Accepted: 04/06/2022] [Indexed: 10/18/2022]
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Chordoma: 18F-FDG PET/CT and MRI imaging features. Skeletal Radiol 2021; 50:1657-1666. [PMID: 33521875 DOI: 10.1007/s00256-021-03723-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 01/21/2021] [Accepted: 01/21/2021] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Examine the 18F-FDG PET/CT and MRI imaging characteristics of chordoma. MATERIALS AND METHODS Biopsy-proven chordoma with a pre-therapy 18F-FDG PET/CT from 2001 through 2019 in patients > 18 years old were retrospectively reviewed. Multiple PET/CT and MRI imaging parameters were assessed. RESULTS A total of 23 chordoma patients were included (16 M, 7 F; average age of 60.1 ± 13.0 years) with comparative MRI available in 22 cases. This included 13 sacrococcygeal, 9 mobile spine, and one clival lesions. On 18F-FDG PET/CT, chordomas demonstrated an average SUVmax of 5.8 ± 3.7, average metabolic tumor volume (MTV) of 160.2 ± 263.8 cm3, and average total lesion glycolysis (TLG) of 542.6 ± 1210 g. All demonstrated heterogeneous FDG activity. On MRI, chordomas were predominantly T2 hyperintense (22/22) and T1 isointense (18/22), contained small foci of T1 hyperintensity (17/22), and demonstrated heterogeneous enhancement (14/20). There were no statistically significant associations found between 18F-FDG PET/CT and MRI imaging features. There was no relationship of SUVmax (p = 0.53), MTV (p = 0.47), TLG (p = 0.48), maximal dimension (p = 0.92), or volume (p = 0.45) to the development of recurrent or metastatic disease which occurred in 6/22 patients over a mean follow-up duration of 4.1 ± 2.0 years. CONCLUSION On 18F-FDG PET/CT imaging, chordomas demonstrate moderate, heterogeneous FDG uptake. Predominant T2 hyperintensity and small foci of internal increased T1 signal are common on MRI. The inherent FDG avidity of chordomas suggests that 18F-FDG PET/CT may be a useful modality for staging, evaluating treatment response, and assessing for recurrent or metastatic disease.
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Fakhar Y, Gholami G, Bakhshi Golestani Z, Sadeghi R, Dabbagh Kakhki VR. Unusual presentation of lumbar chordoma on bone scintigraphy in a young patient. ASIA OCEANIA JOURNAL OF NUCLEAR MEDICINE & BIOLOGY 2021; 9:76-79. [PMID: 33392355 DOI: 10.22038/aojnmb.2020.48929.1331] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Chordoma is a rare bone cancer which arises from undifferentiated notochordal remnants in the axial skeleton. It generally has slow-growing and locally aggressive behavior. This tumor is usually diagnosed by CT and MRI modalities and the role of SPECT/CT is still debated. It shows reduced or normal uptake of radioisotope on bone scanning and increased tracer uptake is infrequently reported. Here we present a 33-year-old man with complaint of low back pain and numbness of his right leg. The whole body bone scan showed relatively uniform radiotracer activity throughout the skeleton. A focal increased uptake in the second lumbar vertebra was noted on SPECT/CT images. SPECT/CT also demonstrated multiple lytic lesions in lumbar vertebrae. The lesions were proven to be chordoma on biopsy. Lumbar chordoma could be one of the differential diagnoses for lytic lesions of the vertebrae which show absent or minimal tracer uptake on bone scintigraphy and SPECT/CT imaging. Our case was unusual as the patient was very young for chordoma diagnosis and bone scan showed increased uptake adjacent to the involved vertebral lesion detected by SPECT/CT.
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Affiliation(s)
- Yasaman Fakhar
- Nuclear Medicine Research Center, Mashhad University of Medical Science, Mashhad, Iran
| | - Golnaz Gholami
- Nuclear Medicine Research Center, Mashhad University of Medical Science, Mashhad, Iran
| | | | - Ramin Sadeghi
- Nuclear Medicine Research Center, Mashhad University of Medical Science, Mashhad, Iran
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Sayyid SK, Wong PK, Read W, Monson DK, Umpierrez M, Gonzalez F, Kakarala A, Singer AD. The clincoradiologic spectrum of notochordal derived masses. Clin Imaging 2019; 56:124-134. [PMID: 31029011 DOI: 10.1016/j.clinimag.2019.04.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 04/02/2019] [Accepted: 04/10/2019] [Indexed: 10/27/2022]
Abstract
The notochord is an essential part of human development that regresses with age. Masses derived from notochordal tissue may be encountered during imaging of the neuroaxis. Fortunately, the majority of these are benign and can usually be differentiated by radiological and clinical findings. In this manuscript, we discuss the clinical and radiologic presentation of the four notochordal derived masses and present a brief overview of their management.
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Affiliation(s)
- Samia K Sayyid
- Department of Radiology and Imaging Sciences, Emory University Hospital, Atlanta, GA, USA
| | - Philip K Wong
- Department of Radiology and Imaging Sciences, Emory University Hospital, Atlanta, GA, USA
| | - William Read
- Department of Hematology and Oncology, Emory University Hospital, Atlanta, GA, USA
| | - David K Monson
- Department of Orthopaedic Surgery, Emory University Hospital, Atlanta, GA, USA
| | - Monica Umpierrez
- Department of Radiology and Imaging Sciences, Emory University Hospital, Atlanta, GA, USA
| | - Felix Gonzalez
- Department of Radiology and Imaging Sciences, Emory University Hospital, Atlanta, GA, USA
| | - Aparna Kakarala
- Department of Radiology and Imaging Sciences, Emory University Hospital, Atlanta, GA, USA
| | - Adam D Singer
- Department of Radiology and Imaging Sciences, Emory University Hospital, Atlanta, GA, USA.
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Meng T, Jin J, Jiang C, Huang R, Yin H, Song D, Cheng L. Molecular Targeted Therapy in the Treatment of Chordoma: A Systematic Review. Front Oncol 2019; 9:30. [PMID: 30775316 PMCID: PMC6367227 DOI: 10.3389/fonc.2019.00030] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Accepted: 01/10/2019] [Indexed: 12/21/2022] Open
Abstract
Objectives: Chordoma is a rare bone malignancy that affects the spine and skull base. Treatment dilemma leads to a high rate of local relapse and distant metastases. Molecular targeted therapy (MTT) is an option for advanced chordoma, but its therapeutic efficacy and safety have not been investigated systematically. Therefore, a systematic review was conducted on studies reporting MTT regimens for chordoma. Methods: Clinical trials, case series and case reports on chordoma MTT were identified using MEDLINE, Cochrane library and EMBASE, and systematically reviewed. Data on clinical outcomes, such as median overall survival, progression-free survival, response rate and adverse events (AEs) were extracted and analyzed. Results: Thirty-three eligible studies were selected for the systematic review, which indicated that imatinib and erlotinib were the most frequently used molecular targeted inhibitors (MTIs) for chordoma. For PDGFR-positive and/or EGFR-positive chordoma, clinical benefits were achieved with acceptable AEs. Monotherapy is preferred as the first-line of treatment, and combined drug therapy as the second-line treatment. In addition, the brachyury vaccine has shown promising results. Conclusions: The selection of MTIs for patients with advanced or relapsed chordoma should be based on gene mutation screening and immunohistochemistry (IHC). Monotherapy of TKIs is recommended as the first-line management, and combination therapy (two TKIs or TKI plus mTOR inhibitor) may be the choice for drug-resistant chordoma. Brachyury vaccine is a promising therapeutic strategy and requires more clinical trials to evaluate its safety and efficacy.
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Affiliation(s)
- Tong Meng
- Division of Spine, Department of Orthopedics, Tongji Hospital Affiliated to Tongji University School of Medicine, Shanghai, China.,Shanghai Bone Tumor Institution, Shanghai, China.,Department of Orthopedics, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Jiali Jin
- Department of Central Laboratory, Shanghai Tenth People's Hospital of Tongji University, School of Medicine, School of Life Sciences and Technology, Tongji University, Shanghai, China
| | - Cong Jiang
- Beth Israel Deaconess Medical Center, BIDMC Cancer Center, Harvard Medical School, Cancer Research Institute, Boston, MA, United States
| | - Runzhi Huang
- Division of Spine, Department of Orthopedics, Tongji Hospital Affiliated to Tongji University School of Medicine, Shanghai, China
| | - Huabin Yin
- Shanghai Bone Tumor Institution, Shanghai, China.,Department of Orthopedics, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Dianwen Song
- Shanghai Bone Tumor Institution, Shanghai, China.,Department of Orthopedics, Shanghai General Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Liming Cheng
- Division of Spine, Department of Orthopedics, Tongji Hospital Affiliated to Tongji University School of Medicine, Shanghai, China.,Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, Tongji University, Shanghai, China
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10
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Cui F, Su M, Zhang H, Tian R. Humeral metastasis of sacrococcygeal chordoma detected by fluorine-18 fluorodeoxyglucose positron emission tomography-computed tomography: A case report. Radiol Case Rep 2018; 13:449-452. [PMID: 29904494 PMCID: PMC6000026 DOI: 10.1016/j.radcr.2018.01.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Accepted: 01/27/2018] [Indexed: 02/05/2023] Open
Abstract
Chordomas are rare, slow-growing, locally aggressive bone tumors arising from embryonic remnants of the notochord. Distant metastases most commonly involve the lung, liver, axial skeleton, skin, and lymph nodes. Humeral metastases are extremely rare. We report the case of a recurrent chordoma with humeral metastasis, complicated with pathologic fracture. Fluorine-18 fluorodeoxyglucose positron emission tomography-computed tomography revealed multiple hypermetabolic skeletal lesions, corresponding to the symptoms. Our report suggests that positron emission tomography-computed tomography is useful for evaluation of recurrence and distant metastases of chordomas.
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Affiliation(s)
- Futao Cui
- Department of Nuclear Medicine, West China Hospital, Sichuan University, 37 Guoxue Lane, Wuhou District, Chengdu, Sichuan 610000, P.R. China
| | - Minggang Su
- Department of Nuclear Medicine, West China Hospital, Sichuan University, 37 Guoxue Lane, Wuhou District, Chengdu, Sichuan 610000, P.R. China
| | - Han Zhang
- Department of nuclear medicine and molecular imaging, Singapore General Hospital, Outram Road, Singapore 169608, Singapore
| | - Rong Tian
- Department of Nuclear Medicine, West China Hospital, Sichuan University, 37 Guoxue Lane, Wuhou District, Chengdu, Sichuan 610000, P.R. China
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11
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Multifocal metastatic chordoma to the soft tissues of the fingertips: a case report including sonographic features and a review of the literature. Skeletal Radiol 2018; 47:401-406. [PMID: 28986658 DOI: 10.1007/s00256-017-2785-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 09/25/2017] [Accepted: 09/27/2017] [Indexed: 02/02/2023]
Abstract
Chordoma is a rare, locally aggressive tumor which commonly metastasizes, most often to the lung, liver, and spine. In this case report, a 59-year-old male with history of sacral chordoma and pulmonary metastases presented to the emergency department with swelling and discoloration of multiple left fingertips. The initial radiographs led to a presumptive diagnosis of gout, which did not respond to medical therapy. An ultrasound demonstrated multiple solid masses with vascular hyperechoic septations which were subsequently biopsied and proven to be metastatic chordoma. Metastatic disease to the hand is a well documented but rare manifestation of many malignancies. The clinical presentation and radiographic features of multifocal hand metastases may mimic entities such as systemic deposition and granulomatous diseases. To the best of our knowledge, this is the first case report of soft tissue chordoma metastases to the fingertips as well as the first reported sonographic description of chordoma metastases.
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12
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Harryman WL, Gard JMC, Pond KW, Simpson SJ, Heppner LH, Hernandez-Cortes D, Little AS, Eschbacher JM, Cress AE. Targeting the Cohesive Cluster Phenotype in Chordoma via β1 Integrin Increases Ionizing Radiation Efficacy. Neoplasia 2017; 19:919-927. [PMID: 28954241 PMCID: PMC5614733 DOI: 10.1016/j.neo.2017.08.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 08/05/2017] [Accepted: 08/14/2017] [Indexed: 01/31/2023] Open
Abstract
Chordoma is a rare, radiation-resistant, skull-base and spinal tumor with high local recurrence containing mixed cell-adhesion phenotypes. We characterized DNA damage response (DDR) signaling (γH2AX, pKAP1, pATM) and survival response to ionizing radiation (IR) in human chordoma samples (42 resections, 23 patients) to test if blocking cell adhesion sensitizes U-CH1 tumor cells to IR. U-CH1 cells expressed brachyury, YAP, and laminin adhesion receptors (CD49c, CD49f, CD44), and approximately 15% to 20% of U-CH1 cells featured an α6 integrin-dependent (CD49f) cohesive cluster phenotype, which confers therapeutic resistance and aids metastasis. DDR to IR in U-CH1 cells was compared to normal prostate epithelial (PrEC) and tumor cells (DU145). Flow cytometry showed a dose- and time-dependent increase in γH2AX and pKAP1 expression in all cell lines. However, nearly 50% of U-CH1 cells exhibited nonresponsive phenotype to IR (measured by γH2AX and pKAP1) independent of cell cycle status. Immunofluorescence microscopy verified that only 15% of U-CH1 clustered cells were γH2AX or pKAP1 positive (versus 80% of nonclustered cells) 2 hours following 2-Gy IR. Conversely, both tumor cell lines were uniformly defective in pATM response. HYD1, a synthetic ECM ligand, inhibited DDR through an unresolved γH2AX response. β1 integrin-blocking antibody (AIIB2) decreased cell survival 50% itself and approximately doubled the IR-induced cell kill at all IR doses observed at 2 and 4 weeks posttreatment. These results suggest that a heterogeneity of DDR to IR exists within a chordoma population. Blocking integrin function alone and/or as an adjuvant to IR may eradicate chordomas containing the cohesive cluster phenotype.
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Affiliation(s)
- William L Harryman
- University of Arizona Cancer Center, 1515 N. Campbell Ave., Tucson, AZ, 85724
| | - Jaime M C Gard
- University of Arizona Cancer Center, 1515 N. Campbell Ave., Tucson, AZ, 85724
| | - Kelvin W Pond
- Department of Cellular and Molecular Medicine, The University of Arizona, 1515 N. Campbell Ave., Tucson, AZ, 85724
| | - Skyler J Simpson
- University of Arizona Cancer Center, 1515 N. Campbell Ave., Tucson, AZ, 85724; Medical Student Research Program, The University of Arizona College of Medicine, 1515 N. Campbell Ave., Tucson, AZ, 85724
| | - Lucas H Heppner
- University of Arizona Cancer Center, 1515 N. Campbell Ave., Tucson, AZ, 85724
| | - Daniel Hernandez-Cortes
- Cancer Biology Research Program, The University of Arizona, 1515 N. Campbell Ave., Tucson, AZ, 85724
| | - Andrew S Little
- Barrow Neurological Institute, 350 W. Thomas Rd., Phoenix, AZ, 85013
| | | | - Anne E Cress
- University of Arizona Cancer Center, 1515 N. Campbell Ave., Tucson, AZ, 85724; Department of Cellular and Molecular Medicine, The University of Arizona, 1515 N. Campbell Ave., Tucson, AZ, 85724.
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13
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Chang C, Chebib I, Torriani M, Bredella M. Osseous metastases of chordoma: imaging and clinical findings. Skeletal Radiol 2017; 46:351-358. [PMID: 28064345 DOI: 10.1007/s00256-016-2566-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Revised: 12/13/2016] [Accepted: 12/29/2016] [Indexed: 02/02/2023]
Abstract
PURPOSE To describe the imaging and clinical characteristics of chordoma osseous metastases (COM). MATERIALS AND METHODS Our study was IRB approved and HIPAA compliant. A retrospective search of our pathology database for pathology-proven COM yielded 15 patients who had undergone MRI, CT, bone scan, and/or FDG-PET/CT. The imaging and clinical features of the COMs were recorded. A control group of age and gender matched chordoma patients without osseous metastasis was evaluated. RESULTS The COM mean maximal dimension was 6.4 ± 4.0 cm. The majority (60%) of patients had one lesion. Extra-osseous soft tissue component was present in 85% and was larger than intra-osseous component in 76%. On MRI the lesions were heterogeneous but predominantly T2 hyperintense with hypointense septae, and with variable enhancement. On CT the lesions were typically destructive or permeative; calcifications were rare. The extent of the soft tissue component was isodense to muscle on CT and therefore better evaluated on MRI. COM was in a body part contiguous to the site of the primary tumor. Compared to the controls, COM patients were more likely to have local recurrence (P = 0.0009) and positive resection margins (P = 0.002). At 1 year, 33% of COM patients were deceased and 13% had progressive metastases. CONCLUSION COM are associated with large extra-osseous soft tissue components, which are better visualized by MRI. They are often located in a body part contiguous to the site of the primary tumor, portend poor prognosis, and are associated with positive resection margins and local recurrence.
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Affiliation(s)
- Connie Chang
- Division of Musculoskeletal Imaging and Intervention, Department of Radiology, Massachusetts General Hospital, 55 Fruit Street Yawkey 6E, Boston, MA, 02114, USA.
| | - Ivan Chebib
- Department of Pathology, Massachusetts General Hospital, Boston, MA, USA
| | - Martin Torriani
- Division of Musculoskeletal Imaging and Intervention, Department of Radiology, Massachusetts General Hospital, 55 Fruit Street Yawkey 6E, Boston, MA, 02114, USA
| | - Miriam Bredella
- Division of Musculoskeletal Imaging and Intervention, Department of Radiology, Massachusetts General Hospital, 55 Fruit Street Yawkey 6E, Boston, MA, 02114, USA
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