The DOI matches its Crossref record; 21 of the 21 references it cites were found in a registry or an index.
Chordoma: The Nonsarcoma Primary Bone Tumor
Open accessAbstract
Chordomas are rare, slowly growing, locally aggressive neoplasms of bone that arise from embryonic remnants of the notochord. These tumors typically occur in the axial skeleton and have a proclivity for the spheno-occipital region of the skull base and sacral regions. In adults, 50% of chordomas involve the sacrococcygeal region, 35% occur at the base of the skull near the spheno-occipital area, and 15% are found in the vertebral column. Craniocervical chordomas most often involve the dorsum sella, clivus, and nasopharynx. Chordomas are divided into conventional, chondroid, and dedifferentiated types. Conventional chordomas are the most common. They are characterized by the absence of cartilaginous or additional mesenchymal components. Chondroid chordomas contain both chordomatous and chondromatous features, and have a predilection for the spheno-occipital region of the skull base. This variant accounts for 5%–15% of all chordomas and up to 33% of cranial chordomas. Dedifferentiation or sarcomatous transformation occurs in 2%–8% of chordomas. This can develop at the onset of the disease or later. Aggressive initial therapy improves overall outcome. Patients who relapse locally have a poor prognosis but both radiation and surgery can be used as salvage therapy. Subtotal resection can result in a stable or improved status in as many as 50% of patients who relapse after primary therapy. Radiation therapy may also salvage some patients with local recurrence. One series reported a 2-year actuarial local control rate of 33% for patients treated with proton beam irradiation.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Jemal, A., Siegel, R., Ward, E., Murray, T., Xu, J., & Thun, M. J. (2007) · CA: A Cancer Journal for Clinicians · doi:10.3322/canjclin.57.1.43 · Cited by 7,439
Pathology and genetics of tumours of soft tissue and bone
Fletcher, C. D. �., Unni, K. K., & Mertens, F. (2002) · Medical Entomology and Zoology · Cited by 2,073
Chordoma: incidence and survival patterns in the United States, 1973–1995
McMaster, M. L., Goldstein, A. M., Bromley, C. M., Ishibe, N., & Parry, D. M. (2001) · Cancer Causes & Control · doi:10.1023/a:1008947301735 · Cited by 966
Proton radiation therapy for chordomas and chondrosarcomas of the skull base
Hug, E. B., Loredo, L. N., Slater, J. D., Devries, A., Grove, R. I., Schaefer, R. A., Rosenberg, A. E., & Slater, J. M. (1999) · Journal of Neurosurgery · doi:10.3171/jns.1999.91.3.0432 · Cited by 510
Chordoma of the Mobile Spine: Fifty Years of Experience
Boriani, S., Bandiera, S., Biagini, R., Bacchini, P., Boriani, L., Cappuccio, M., Chevalley, F., Gasbarrini, A., Picci, P., & Weinstein, J. N. (2006) · Spine · doi:10.1097/01.brs.0000200038.30869.27 · Cited by 425
Austin-Seymour, M., Munzenrider, J., Goitein, M., Verhey, L., Urie, M., Gentry, R., Birnbaum, S., Ruotolo, D., McManus, P., Skates, S., et al. (1989) · Journal of Neurosurgery · doi:10.3171/jns.1989.70.1.0013 · Cited by 306
Results of carbon ion radiotherapy in 152 patients
Schulz–Ertner, D., Nikoghosyan, A. V., Thilmann, C., Haberer, T., Jäkel, O., Karger, C. P., Kraft, G., Wannenmacher, M. F., & Debus, J. (2004) · International Journal of Radiation Oncology*Biology*Physics · doi:10.1016/j.ijrobp.2003.09.041 · Cited by 287
Casali, P. G., Messina, A., Stacchiotti, S., Tamborini, E., Crippa, F., Gronchi, A., Orlandi, R., Ripamonti, C., Spreafico, C., Bertieri, R., et al. (2004) · Cancer · doi:10.1002/cncr.20618 · Cited by 268
Updates on the cytogenetics and molecular genetics of bone and soft tissue tumors
Sandberg, A. A., & Bridge, J. A. (2003) · Cancer Genetics and Cytogenetics · doi:10.1016/s0165-4608(03)00002-5 · Cited by 214
Brainstem tolerance to conformal radiotherapy of skull base tumors
Debus, J., Hug, E. B., Liebsch, N. J., O'Farrel, D., Finkelstein, D., Efird, J., & Munzenrider, J. E. (1997) · International Journal of Radiation Oncology*Biology*Physics · doi:10.1016/s0360-3016(97)00364-7 · Cited by 208
Cited by
Chordoma: current concepts, management, and future directions
Walcott, B. P., Nahed, B. V., Mohyeldin, A., Coumans, J.-V., Kahle, K. T., & Ferreira, M. J. (2012) · The Lancet Oncology · doi:10.1016/s1470-2045(11)70337-0 · Cited by 769
DNA methylation-based prognostic subtypes of chordoma tumors in tissue and plasma
Zuccato, J. A., Patil, V., Mansouri, S., Liu, J. C., Nassiri, F., Mamatjan, Y., Chakravarthy, A., Karimi, S., Almeida, J. P., Bernat, A.-L., et al. (2022) · Neuro-Oncology · doi:10.1093/neuonc/noab235 · Cited by 53
Metadata
- Authors
- Chugh, R., Tawbi, H., Lucas, D. R., Biermann, J. S., Schuetze, S. M., & Baker, L. H.
- Venue
- The Oncologist
- Publisher
- Oxford University Press (OUP)
- Published
- 2007-11-01
- Volume
- 12
- Issue
- 11
- Pages
- 1344-1350
- ISSN
- 1083-7159 (ISSN-L)
- 1549-490X
- OpenAlex
- W2099252068
- Cited by
- 388
- References
- 21
- FWCI
- 8.27
- Type
- journal article
- Language
- en
- Open access
- bronze
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Chordoma: The Nonsarcoma Primary Bone Tumor. https://app.cochat.ai/papers/10.1634/theoncologist.12-11-1344
- The paper
- Chugh, R., Tawbi, H., Lucas, D. R., Biermann, J. S., Schuetze, S. M., & Baker, L. H. (2007). Chordoma: The Nonsarcoma Primary Bone Tumor. The Oncologist. https://doi.org/10.1634/theoncologist.12-11-1344
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.