Cancer surgery cancellation: incidence, outcomes and recovery in a universal health care system.

Background: Cancer surgery cancellation can have negative consequences for the patient, the surgeon and the health care system. There is a paucity of literature on cancer surgery cancellation and its association with wait times, perioperative outcomes, survival and costs of care. Therefore, the objective of this study was to determine the incidence of same-day cancer surgery cancellation in a universal health care context and its association with short and long-term outcomes.

When will the Covid-19 pandemic peak?

We carry out some analysis of the daily data on the number of new cases and the number of new deaths by (191) countries as reported to the European Centre for Disease Prevention and Control (ECDC). Our benchmark model is a quadratic time trend model applied to the log of new cases for each country. We use our model to predict when the peak of the epidemic will arise in terms of new cases or new deaths in each country and the peak level.

Influence of Residual Tumor Volume and Radiation Dose Coverage in Outcomes for Clival Chordoma.

Purpose: The purpose of this study was to evaluate factors associated with tumor control in clival chordomas.

Methods And Materials: A retrospective review of 39 patients treated with surgery and proton therapy for clival chordomas between 2004 and 2014 was performed. The median prescribed dose was 77.

Proton therapy for head and neck adenoid cystic carcinoma: initial clinical outcomes.

Background: The purpose of this study was to report outcomes of proton therapy in head and neck adenoid cystic carcinoma.

Methods: We conducted a retrospective analysis of 26 patients treated between 2004 and 2012. Twenty patients (77%) had base of skull involvement; 19 (73%) were treated for initial disease and 7 (27%) for recurrent disease.

Dose-volume relationships associated with temporal lobe radiation necrosis after skull base proton beam therapy.

Purpose: We evaluated patient and treatment parameters correlated with development of temporal lobe radiation necrosis.

Methods And Materials: This was a retrospective analysis of a cohort of 66 patients treated for skull base chordoma, chondrosarcoma, adenoid cystic carcinoma, or sinonasal malignancies between 2005 and 2012, who had at least 6 months of clinical and radiographic follow-up. The median radiation dose was 75.

Proton therapy for reirradiation of progressive or recurrent chordoma.

Purpose: To report the results in patients reirradiated with proton therapy for recurrent or progressive chordoma, with or without salvage surgery.

Methods And Materials: A retrospective review of 16 consecutive patients treated from 2005 to 2012 was performed. All patients had received at least 1 prior course of radiation therapy to the same area, and all but 1 patient had at least 1 surgical resection for disease before receiving reirradiation.

Prognostic significance of basaloid squamous cell carcinoma in head and neck cancer.

Importance: Head and neck basaloid squamous cell carcinoma (BSCC) has been considered a more aggressive variant of squamous cell carcinoma (SCC) with a poorer prognosis, although case-control studies have reached conflicting conclusions.

Objective: To examine the prognostic significance of head and neck BSCC on overall survival in a large population-based registry.

Design And Setting: Retrospective data review of a population-based registry from the Surveillance, Epidemiology, and End Results database.

Applications of justification and optimization in medical imaging: examples of clinical guidance for computed tomography use in emergency medicine.

Availability, reliability, and technical improvements have led to continued expansion of computed tomography (CT) imaging. During a CT scan, there is substantially more exposure to ionizing radiation than with conventional radiography. This has led to questions and critical conclusions about whether the continuous growth of CT scans should be subjected to review and potentially restraints or, at a minimum, closer investigation.