[Dosage of presurgical cefazolin in obese and non-obese patients. Does weight matter?] / Dosificación de cefazolina prequirúrgica en pacientes obesos y no obesos. ¿Importa el peso?

OBJECTIVE: Evaluation of the effectiveness of a standard dose of cefalozin 2 grams for surgical site infection (SSI) prevention in obese patients compared to non-obese patients. There is no still controversy surrounding which is the best dosage of this antibiotic in obese patients for surgical prophylaxis. METHODS: Retrospective review of men who received prophylactic cefazolin between January 1st, 2019 and June 30th, 2019 in a traumatology department of a university hospital. Patients were stratified into 2 groups: obese (≥ 100 kg and body mass index (BMI)> 30 kg / m2) and non-obese. Patients without a 90 days follow-up after surgery and/or with an active infection at the time of surgery and/or treated with immunosuppressants were excluded. Demographic data, height, real weight, smoking, diabetes, concomitant use of immunosuppressants, surgery data and presence of infection until day 90 were collected. RESULTS: A total of 57 patients underwent traumatic surgery with prophylactic cefazolin, 26 non-obese and 23 obese, were studied. Both groups presented statistically significant differences in weight, BMI and post-surgery use of cefazolin. No significant differences were observed in the other variables. Two obese (8.7%) and two non-obese (7.7%) patients developed SSIs after 63 days post-surgery on average, following the difference between the groups being statistically non-significant. CONCLUSIONS: This study shows that there is no significant difference in SSI with a standard prophylactic dose of two grams of cefazolin between obese and non-obese patients.

Long-term response control in a patient with metastatic squamous cell lung cancer after treatment with nivolumab: a case report.

INTRODUCTION: Nivolumab is a fully human programmed death control immune point 1 immune checkpoint inhibitor antibody which promotes antitumor immunity. Cutaneous toxicity associated with nivolumab, immune system related, could be linked to a more durable response in patients with squamous cell lung cancer. CASE REPORT: We present the case of a 62-year-old male diagnosed with metastatic squamous cell lung cancer, who was treated with nivolumab after cytotoxic chemotherapy. After treatment discontinuation, due to grade 2 cutaneous toxicity, the patient is maintaining with durable partial response for more than one year with close follow-up. MANAGEMENT AND OUTCOME: Cumulative doses of nivolumab could cause immunological toxicities that may prolong survival of these patients even after discontinuation of treatment. DISCUSSION: Nivolumab was approved by European Medicines Agency (EMA), as second-line therapeutic, for the treatment of squamous cell lung cancer, showing a median of 9.23 months of overall survival. The development of immune-related skin toxicities has been associated with greater clinical benefit in patients with lung cancer. When cutaneous toxicity forces to nivolumab suspension, in certain cases, the option of not starting again and closely following up the patient may appear reasonable, even though there are no survival data in this context. Suspension of treatment with close monitoring of these patients until progression may be an alternative, since immune-related skin toxicities could be related to a greater clinical benefit and a durable response to nivolumab.