RESUMO
The origin of SARS-CoV-2 is still the subject of a controversial debate. The natural origin theory is confronted to the laboratory leak theory. The latter is composite and comprises contradictory theories, one being the leak of a naturally occurring virus and the other the leak of a genetically engineered virus. The laboratory leak theory is essentially based on a publication by Rahalkar and Bahulikar in 2020 linking SARS-CoV-2 to the Mojiang mine incident in 2012 during which six miners fell sick and three died. We analyzed the clinical reports. The diagnosis is not that of COVID-19 or SARS. SARS-CoV-2 was not present in the Mojiang mine. We also bring arguments against the laboratory leak narrative.
Assuntos
COVID-19 , Acidentes , Humanos , Laboratórios , SARS-CoV-2RESUMO
BACKGROUND: Ultrasound and CT-guided biopsy is a common procedure for histologic diagnosis of recurrence of head and neck squamous cell carcinoma. The present study describes a novel CT-guided endolaryngeal puncture site. METHODS AND RESULTS: A 59-year-old man was treated for a T2N0M0 supraglottic laryngeal tumor by laser resection and bilateral lymph node dissection; exeresis was judged complete. Six-month follow-up found persistent dysphonia. Endoscopic examination and iterative biopsy gave reassuring results, but (18) fluorodeoxyglucose positron emission tomography-CT ((18) FDG PET-CT) found highly suspicious increased right hemilaryngeal metabolic activity. Diagnosis of residual tumor was confirmed on CT-guided endolaryngeal biopsy. CONCLUSIONS: Image-guided biopsy is the technique of choice in head and neck lesions that are deep or difficult to palpate and inaccessible to endoscopy. It is especially useful when recurrence is suspected after radiation therapy or cancer surgery. Many puncture sites have been reported in the literature; the present novel laryngeal approach extends the range of image-guided biopsy, although further studies will be needed to assess possible morbidity.
