Early clinical outcomes for 3 radiation techniques for brain metastases: focal versus whole-brain.

Purpose: To present our novel technique for brain metastases (low-dose whole brain radiation therapy [WBRT] with simultaneous integrated boost (SIB) and focal, frameless stereotactic intensity modulated radiotherapy [IMRT]) in the context of patterns of failure, dosimetry, acute toxicity, and overall survival for 3 different radiation techniques.

Methods And Materials: We retrospectively reviewed 92 patients undergoing radiation for brain metastases via the following: (1) "prophylactic" WBRT to a low dose (median 30 Gy) with an SIB to the gross tumor volume plus 2-3 mm margin (median dose 45 Gy) in 10-15 fractions; (2) focal, frameless image-guided stereotactic IMRT (S-IMRT) in 5 fractions to tumor only (median 30 Gy); or (3) conventional (c)WBRT using 2 lateral opposed beams in 10-15 fractions (30-37.5 Gy).

Use of radiation after breast conserving surgery (BCS) for DCIS and early invasive breast cancer at Charleston Area Medical Center (CAMC). A study of compliance with National Comprehensive Cancer Network (NCCN) guidelines.

The National Comprehensive Cancer Network (NCCN) recommends that patients with ductal carcinoma in situ (DCIS) and stage I/II invasive breast cancer receive radiation therapy following breast conserving surgery (BCS). The purpose for our study was to determine 1) the percentage of patients with DCIS and stage I/II breast cancer who received radiation therapy following BCS and 2) the clinical factors associated with the use of radiation. We retrospectively studied 606 patients treated between 2000 and 2007 with BCS for DCIS (n=104) and stage I/II breast cancer (n=502).

Superiority of equivalent uniform dose (EUD)-based optimization for breast and chest wall.

We investigate whether IMRT optimization based on generalized equivalent uniform dose (gEUD) objectives for organs at risk (OAR) results in superior dosimetric outcomes when compared with multiple dose-volume (DV)-based objectives plans for patients with intact breast and postmastectomy chest wall (CW) cancer. Four separate IMRT plans were prepared for each of the breast and CW cases (10 patients). The first three plans used our standard in-house, physician-selected, DV objectives (phys-plan); gEUD-based objectives for the OARs (gEUD-plan); and multiple, "very stringent," DV objectives for each OAR and PTV (DV-plan), respectively.

Inhibition of STAT-3 results in radiosensitization of human squamous cell carcinoma.

Background: Signal transducer and activator of transcription-3 (STAT-3) is a downstream component of the Epidermal Growth Factor Receptor (EGFr) signaling process that may facilitate the resistance of tumor cells to conventional cancer treatments. Studies were performed to determine if inhibition of this downstream protein produces radiosensitization.

Methods/results: A431 cells (human squamous cell carcinoma cells with EGFr overexpression) were found to be sensitized to radiation after treatment with STAT-3 small interfering RNA (siRNA).

Bulb of penis as a marker for prostatic apex in external beam radiotherapy of prostate cancer.

Purpose: To investigate the relationship between the bulb of the penis and the peak of the urethrogram, and to compare this measurement with the ischial tuberosities (ITs) to peak distance.

Methods And Materials: Pelvic CT scans from 50 consecutive patients with localized prostate cancer were analyzed to identify the penile bulb. Each patient was required to undergo retrograde urethrography during CT-based treatment planning with 3-mm slices.