Dosimetric Comparison between Single and Dual Arc-Volumetric Modulated Arc Radiotherapy and Intensity Modulated Radiotherapy for Nasopharyngeal Carcinoma Using a Simultaneous Integrated Boost Technique.

Backround: Plan quality and performance of dual arc (DA) volumetric modulated arc therapy (VMAT) , single arc (SA) VMAT and nine field (9F) intensity modulated radiotherapy were compared using a simultaneous integrated boost (SIB) technique. Methods: Twelve patients treated in Elekta Synergy Platform (mlci2) by 9F-IMRT were replanned with SA/DA-VMAT using a CMS Monaco Treatment Planning System (TPS) with Monte Carlo simulation. Target delineation was conducted as per Radiation Therapy Oncology Protocols (RTOG0225 and 0615).

Metastatic squamous cell carcinoma thyroid from functionally cured cancer cervix.

The authors report a very unusual occurrence of a metastatic squamous carcinoma to thyroid gland from a treated squamous cell carcinoma cervix 12 years before with no recurrence at the primary site. The case also has an additional complexity of rapid progression of the metastatic thyroid carcinoma to wide spread dissemination to lungs and bones while on concurrent chemo radio therapy confirming the aggressiveness of the entity.

Set-up uncertainties: online correction with X-ray volume imaging.

Aim: To determine interfractional three-dimensional set-up errors using X-ray volumetric imaging (XVI).

Materials And Methods: Between December 2007 and August 2009, 125 patients were taken up for image-guided radiotherapy using online XVI. After matching of reference and acquired volume view images, set-up errors in three translation directions were recorded and corrected online before treatment each day.

Pulmonary metastasis from renal synovial sarcoma treated by stereotactic body radiotherapy: a case report and review of the literature.

Primary synovial sarcoma of kidney is an uncommon neoplasm, metastasizing most commonly to lung. Surgery and/or palliative chemotherapy for pulmonary metastases is commonly used to improve tumor control and survival. Stereotactic body radiotherapy (SBRT) is a relatively new approach to treat pulmonary metastasis, encouraged by the results of cranial and spinal stereotactic radiosurgery.