Digital PCR analysis of circulating tumor DNA: a biomarker for chondrosarcoma diagnosis, prognostication, and residual disease detection

Conventional chondrosarcoma is the most common primary bone tumor in adults. Prognosis corresponds with tumor grade but remains variable, especially for individuals with grade (G) II disease. There are currently no biomarkers available for monitoring or prognostication of chondrosarcoma. Circulating tumor DNA (ctDNA) has recently emerged as a promising biomarker for a broad range of tumor types. To date, little has been done to study the presence of ctDNA and its potential utility in the management of sarcomas, including chondrosarcoma. In this study, we have assessed ctDNA levels in a cohort of 71 patients, 32 with sarcoma, including 29 individuals with central chondrosarcoma (CS) and 39 with locally aggressive and benign bone and soft tissue tumors, using digital PCR. In patients with CS, ctDNA was detected in pretreatment samples in 14/29 patients, which showed clear correlation with tumor grade as demonstrated by the detection of ctDNA in all patients with GIII and dedifferentiated disease (n = 6) and in 8/17 patients with GII disease, but never associated with GI CS. Notably detection of ctDNA preoperatively in GII disease was associated with a poor outcome. A total of 14 patients with CS had ctDNA levels assessed at multiple time points and in most patients there was a clear reduction following surgical removal. This research lays the foundation for larger studies to assess the utility of ctDNA for chondrosarcoma diagnosis, prognostication, early detection of residual disease and monitoring disease progression

Elder Abuse and Mistreatment

This multidisciplinary volume assembles current findings on violent crime, behavioral, biological, and sociological perspectives on its causes, and effective methods of intervention and prevention. Noted experts across diverse fields apply a behavioral criminology lens to examine crimes committed by minors, extremely violent offenses, sexual offending, violence in families, violence in high-risk settings, and crimes of recent and emerging interest. The work of mental health practitioners and researchers is shown informing law enforcement response to crime in interrogation, investigative analysis, hostage negotiations, and other core strategies. In addition, chapters pay special attention to criminal activities that violate traditional geographic boundaries, from cyberstalking to sex trafficking to international terrorism. Among the topics in the Handbook: Dyadic conceptualization, measurement, and analysis of family violence. School bullying and cyberbullying: prevalence, characteristics, outcomes, and prevention. A cultural and psychological perspective on mass murder. Young people displaying problematic sexual behavior: the research and their words. Child physical abuse and neglect. Criminal interviewing and interrogation in serious crime investigations. Violence in correctional settings. Foundations of threat assessment and management. The Handbook of Behavioral Criminology is a meticulous resource for researchers in criminology, psychology, sociology, and related fields. It also informs developers of crime prevention programs and practitioners assessing and intervening with criminal clients and in correctional facilities.https://nsuworks.nova.edu/cps_facbooks/1556/thumbnail.jp