Completion of the informed consent in radioguided surgery by the General Surgery and Nuclear Medicine services of a radioguided surgery unit.

Objective: To identify the frequency of errors in informed consent documents in radioguided surgery in a third level hospital and to detect possible causes or factors associated with a greater risk of error.

Material And Methods: Informed consent forms of a total of 369 radioguided surgery interventions, completed by the Nuclear Medicine and General Surgery services, were analyzed, and the degree of completion of the forms and its correlation with the physicians responsible, type of pathology, intervention, and waiting time were compared with the completion of consent by another specialty.

Results: Errors were identified in 22 consent forms from Nuclear Medicine and 71 from General Surgery.

PERCIST and Hopkins criteria and PET/CT metabolic parameters as prognostic factors in squamous head and neck cancer.

Aim: To assess the clinical utility of PERCIST and Hopkins criteria and changes in [F]FDG PET/CT quantitative parameters as prognostic factors for progression-free survival (PFS) and cancer-specific survival (CSS) in patients with head and neck squamous cell carcinoma treated by chemoradiotherapy.

Material And Methods: Forty patients (34 men) diagnosed with head and neck squamous cell carcinoma were retrospectively assessed over an interval of 8 years. PERCIST and Hopkins criteria were used to assess response to treatment.