scholarly journals Review of skull base chordomas: prognostic factors and long-term results of proton-beam radiotherapy

2001 ◽  
Vol 10 (3) ◽  
pp. 1-5 ◽  
Author(s):  
Eugen B. Hug
Keyword(s):  
Prognostic Factors ◽  
Skull Base ◽  
Proton Beam ◽  
The United States ◽  
Long Term Results ◽  
Severe Toxicity ◽  
Long Term Outcome ◽  
Proton Beam Radiotherapy ◽  
Skull Base Chordomas

Fractionated proton beam radiotherapy has been used for skull base tumors in the United States since the mid-70s, and more than 300 patients in whom diagnosis of chordoma of the skull base has been made have been treated. The ability to achieve high degrees of radiation dose conformity by using protons has resulted in higher radiation doses than can be delivered with conventional radiotherapy in the base of skull. High target volume doses have led to improved tumor control and patient survival. Side effects such as severe toxicity are acceptable considering the alternatives of uncontrolled tumor growth. The authors of various analyses have identified prognostic factors that can be used to predict a patient's chance of treatment success. On the horizon are important technical developments that will further increase dose conformity and increase target doses. In this paper the author reviews long-term outcome data and prognostic predictors for survival of patients with skull base chordomas based on the largest worldwide patient series.

Prognostic factors for long-term outcome of patients with surgical resection of skull base chordomas—106 cases review in one institution

2010 ◽  
Vol 33 (4) ◽  
pp. 451-456 ◽  
Author(s):  
Zhen Wu ◽  
Junting Zhang ◽  
Liwei Zhang ◽  
Guijun Jia ◽  
Jie Tang ◽  
...  
Keyword(s):  
Prognostic Factors ◽  
Skull Base ◽  
Surgical Resection ◽  
Term Outcome ◽  
Long Term Outcome ◽  
Skull Base Chordomas

Pediatric Clival Chordoma: A Curable Disease that Conforms to Collins' Law

Neurosurgery ◽  
2017 ◽  
Vol 82 (5) ◽  
pp. 652-660 ◽  
Author(s):  
Marcio S Rassi ◽  
M Maher Hulou ◽  
Kaith Almefty ◽  
Wenya Linda Bi ◽  
Svetlana Pravdenkova ◽  
...  
Keyword(s):  
Overall Survival ◽  
Skull Base ◽  
Proton Beam ◽  
Statistical Significance ◽  
Progression Free Survival ◽  
Gross Total Resection ◽  
Total Resection ◽  
Free Survival ◽  
Proton Beam Radiotherapy ◽  
Skull Base Chordomas

Abstract BACKGROUND Skull base chordomas in children are extremely rare. Their course, management, and outcome have not been defined. OBJECTIVE To describe the preeminent clinical and radiological features in a series of pediatric patients with skull base chordomas and analyze the outcome of a cohort who underwent uniform treatment. We emphasize predictors of overall survival and progression-free survival, which aligns with Collins’ law for embryonal tumors. METHODS Thirty-one patients with a mean age of 10.7 yr (range 0.8-22) harboring skull base chordomas were evaluated. We retrospectively analyzed the outcomes and prognostic factors for 18 patients treated by the senior author, with uniform management of surgery with the aim of gross total resection and adjuvant proton-beam radiotherapy. Mean follow-up was 119.2 mo (range 8-263). RESULTS Abducens nerve palsy was the most common presenting symptom. Imaging disclosed large tumors that often involve multiple anatomical compartments. Patients undergoing gross total resection had significantly increased progression-free survival (P = .02) and overall survival (P = .05) compared with those having subtotal resection. Those who lived through the period of risk for recurrence without disease progression had a higher probability of living entirely free of progression (P = .03; odds ratio = 16.0). Age, sex, and histopathological variant did not yield statistical significance in survival. CONCLUSION Long-term overall and progression-free survival in children harboring skull base chordomas can be achieved with gross surgical resection and proton-beam radiotherapy, despite an advanced stage at presentation. Collins’ law does apply to pediatric skull base chordomas, and children with this disease have a high hope for cure.

scholarly journals PC3 - 141 Long-Term Results of Stereotactic Radiosurgery for Skull Base Meningiomas

2016 ◽  
Vol 43 (S4) ◽  
pp. S21-S21
Author(s):  
O. Cohen-Inbar
Keyword(s):  
Tumor Progression ◽  
Skull Base ◽  
Clinical Improvement ◽  
Tumor Volume ◽  
Long Term Results ◽  
Tumor Control ◽  
Long Term Outcome ◽  
Skull Base Meningiomas

Gamma knife radiosurgery (GKRS) is well-established in the management of inaccessible, recurrent, or residual benign skull base meningiomas. Most series report clinical outcome parameters and complications in the short -intermediate period after radiosurgery. Reports of long-term tumor control and neurological status are still lacking. Objective: We report the presentation, treatment, and long-term outcome of skull base meningiomas after GKRS. Methods: From a prospectively collected IRB approved database, we selected patients with a WHO grade I skull base meningioma treated with a single-session GKRS and a minimum of 60 months follow up. 135 patients, 54.1% males (n=73) form the cohort. Median age was 54 years (19-80). Median tumor volume was 4.7 cm3 (0.5-23). Median margin dose was 15 Gy (7.5-36). Median follow up was 102.5 months (60.1-235.4). Patient and tumor characteristics were assessed to determine predictors of neurological function and tumor progression. Results: At last follow up, tumor volume control was achieved in 88.1% (n=119). Post-GKRS clinical improvement or stability was reported in 61.5%. The 5, 10, and 15 years actuarial progression free survival rates are 100%, 95.4%, and 68.8%, respectively. Favorable outcome (both tumor control and clinical preservation/improvement) was attained in 60.8% (n=79). Pre-GKRS performance status (KPS) was shown to influence tumor progression (p=0.0001) and post-GKRS clinical improvement / preservation (p=0.003). Conclusion: GKRS offers a highly durable rate of tumor control for WHO-I skull base meningiomas, with an acceptably low incidence of neurological deficits. KPS at the time of radiosurgery serves as a reliable long-term predictor of overall outcome.

scholarly journals RARE-25. LONG-TERM OUTCOME OF SKULL BASE CHORDOMAS IN CHILDREN AND ADOLESCENTS

2016 ◽  
Vol 18 (suppl_6) ◽  
pp. vi165-vi165
Author(s):  
M. Maher Hulou ◽  
Marcio Rassi ◽  
Kaith Almefty ◽  
Wenya Linda Bi ◽  
Svetlana Pravdenkova ◽  
...  
Keyword(s):  
Children And Adolescents ◽  
Skull Base ◽  
Term Outcome ◽  
Long Term Outcome ◽  
Skull Base Chordomas

Clinical and radiological evaluation of long-term results of stereotactic proton beam radiosurgery in patients with cerebral arteriovenous malformations

1994 ◽  
Vol 81 (5) ◽  
pp. 683-689 ◽  
Author(s):  
Volker Seifert ◽  
Dietmar Stolke ◽  
Hubertus M. Mehdorn ◽  
Bernd Hoffmann
Keyword(s):  
Proton Beam ◽  
Radiation Treatment ◽  
Clinical Symptoms ◽  
Proton Beam Therapy ◽  
Clinical Results ◽  
The United States ◽  
Long Term Results ◽  
Content Type ◽  
Long Term Observation

✓ Within a period of nearly 10 years, from October, 1980, to May, 1990, a total of 68 patients with a cerebral arteriovenous malformation (AVM) were referred to a radiosurgical center in the United States for stereotactic Bragg peak proton beam therapy. Radiosurgery was chosen as an alternative treatment, either because the AVM was considered to be of high surgical risk due to its size and/or location, or because the patient refused surgery. In 63 patients (92.6%), complete clinical and radiological follow-up examinations were available. Clinical and radiological long-term results were correlated to size and to the Spetzler-Martin scale of the AVM. With increasing size or higher grade on the Spetzler-Martin scale, the clinical results of proton beam therapy became progressively worse. Of 37 patients with an AVM between 3 and 6 cm in diameter, only one-third showed amelioration of their clinical symptoms, and two-thirds remained the same or even deteriorated after radiation treatment. The same results apply to patients with very large AVM's, of whom only one-third profited from proton beam therapy. Although 85.7% of the patients in Spetzler-Martin Grades I and II showed postirradiation amelioration of their clinical symptoms, this compares to only 54.2% of the patients in Grade III, and only 24% in Grade IV. In regard to the radiological results of proton beam therapy, complete obliteration during long-term observation was only detectable in 10 patients or 15.9%, which is less than one-sixth of the whole group of 63 patients. All of these obliterated AVM's were smaller than 3 cm. Almost 85% of the patients treated using stereotactic proton beam therapy did not show any angiographic change in the radiological appearance of their AVM. The results reported here indicate that radiosurgery using stereotactic proton beam therapy is ineffective for the treatment of medium- or large-sized AVM's and should not be recommended for patients harboring an AVM larger than 3 cm. If proton beam treatment is contemplated, it should be restricted to AVM's that are less than 3 cm in size and whose location makes them easily accessible only for proton beam therapy.

scholarly journals MRI Signal Intensity and Electron Ultrastructure Classification Predict the Long-Term Outcome of Skull Base Chordomas

2020 ◽  
Vol 41 (5) ◽  
pp. 852-858
Author(s):  
J. Bai ◽  
J. Shi ◽  
S. Zhang ◽  
C. Zhang ◽  
Y. Zhai ◽  
...  
Keyword(s):  
Skull Base ◽  
Signal Intensity ◽  
Term Outcome ◽  
Long Term Outcome ◽  
Skull Base Chordomas

Long-term results of stereotactic proton beam radiotherapy for acoustic neuromas

2009 ◽  
Vol 90 (2) ◽  
pp. 208-212 ◽  
Author(s):  
Frederik J.A.I. Vernimmen ◽  
Zainab Mohamed ◽  
Jacobus P. Slabbert ◽  
Jennifer Wilson
Keyword(s):  
Proton Beam ◽  
Long Term Results ◽  
Proton Beam Radiotherapy ◽  
Acoustic Neuromas

Long-term results of salvage endoscopic treatment for patients with local failure after chemoradiotherapy for esophageal squamous cell carcinoma.

2014 ◽  
Vol 32 (3_suppl) ◽  
pp. 207-207
Author(s):  
Ken Hatogai ◽  
Tomonori Yano ◽  
Takashi Kojima ◽  
Masakatsu Onozawa ◽  
Toshihiko Doi ◽  
...  
Keyword(s):  
Squamous Cell Carcinoma ◽  
Prognostic Factors ◽  
Esophageal Squamous Cell Carcinoma ◽  
Cell Carcinoma ◽  
Squamous Cell ◽  
Local Failure ◽  
Long Term Results ◽  
Long Term Outcome

207 Background: Local failure is a major problem after chemoradiotherapy (CRT) in patients with esophageal squamous cell carcinoma (ESCC), and salvage surgery presents high morbidity and mortality rates. We have introduced photodynamic therapy (PDT) and endoscopic resection (ER) for local failures to develop a less invasive salvage treatment.The aim of this retrospective study was to clarify the long-term outcome of salvage endoscopic treatments (SET). Methods: Between 1998 and 2008, 716 patients with ESCC were treated with definitive CRT in our institution. There were 314 patients with incomplete response and 103 with local recurrence after achieving complete response (CR) once. The indication criteria of SET were as follows: 1) absence of lymph node and distant metastasis and 2) local failures limited within T2. ER was performed for local failures limited to T1b (SM1), and PDT was performed for lesions invading T1b (SM2) or T2, in patients who could not tolerate or who refused surgery. We assessed overall survival (OS), relapse-free survival (RFS), and also prognostic factors. This study was approved by an institutional review board. Results: A total of 164 patients with local failure underwent SET (ER: 58, PDT: 106). The characteristics before CRT were as follows: T1/2/3/4, 44/25/75/20; N0/1, 85/79; stage I/II/III/IV, 35/59/57/13; and those of before SET were as follows: T1/2, 126/38; residue/recurrence, 76/88. ER achieved curative resection in 51 (87.9%), and PDT achieved CR in 61 (57.5%) patients. With a median follow up period of 73 months, the OS and RFS rates at 5 years from SET were 38.6% (95% CI 31.0–46.2) and 28.1% (95% CI 21.0–35.2). Multivariate analysis revealed 2 preferable prognostic factors in common for OS and RFS, N0 before CRT (OS HR: 0.47 [95% CI 0.32–0.69], RFS HR: 0.61 [95%CI 0.43–0.87]) and a period from initiation of CRT to SET longer than 6 months (OS HR: 0.57 [95%CI 0.39–0.84], RFS HR: 0.67 [0.47–0.95]). After 5 years of follow up, 58 patients (35.4%) were alive without any metastasis under esophagus preservation. Conclusions: SET demonstrated a favorable outcome in an analysis of a large number of patients with local failure after definitive CRT for ESCC.

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