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Updated: Mar 23, 2026

Stereotactic Radiosurgery for Gynecologic Cancer

Stereotactic Radiosurgery for Gynecologic Cancer

Published on: April 17, 2012

Multisession Radiosurgery for Hearing Preservation.

Abdul Rashid¹, Sana D Karam¹, Beenish Rashid¹

¹Department of Radiation Medicine, MedStar Georgetown University Hospital, Washington, DC.

Seminars in Radiation Oncology

|March 23, 2016

Summary

This summary is machine-generated.

Reliable cochlear dose-tolerance limits for 1-5 fraction radiotherapy are now available. This study provides crucial risk estimates for clinical practice, aiding in preserving hearing function during treatment.

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Area of Science:

Radiation Oncology
Medical Physics

Background:

Clinically relevant dose-tolerance limits for the cochlea in 1-5 fractions remain unknown.
Existing guidelines (Timmerman, TG-101, QUANTEC) lack robust risk estimates.
Accurate risk assessment is crucial for preserving hearing function in radiotherapy.

Purpose of the Study:

To establish clinically relevant dose-tolerance limits for the cochlea in 1-5 fraction radiotherapy.
To provide reliable estimates of normal tissue complication probability (NTCP) for various dose constraints.
To inform clinical practice regarding cochlear dose management in acoustic neuroma treatment.

Main Methods:

Aggregate data from 106 acoustic neuroma cases (CyberKnife and Gamma Knife) treated in 1-5 fractions.
Probit dose-response modeling using DVH Evaluator software to estimate NTCP.
Analysis of dose limits from Timmerman, TG-101, and QUANTEC guidelines.

Main Results:

Estimated risk of 17.9% for 14Gy in 1 fraction, aligning with QUANTEC recommendations.
Estimated risk of 17.4% for the Timmerman 27.5Gy maximum dose limit in 5 fractions.
Estimated risks of 11.8% and 13.8% for lower-risk scenarios (Timmerman 12Gy/1 fraction, TG-101 25Gy/5 fractions).

Conclusions:

Presents high-risk and low-risk dose tolerance limits with associated risk estimates for cochlear radiotherapy in 1-5 fractions.
Provides data to support evidence-based clinical decision-making for cochlear dose constraints.
Contributes to minimizing hearing loss risk in patients undergoing cranial radiotherapy.