To the Editor Two and one half paragraphs in the discussion of our published case report1 in Anesthesia & Analgesia were taken verbatim from a previous publication of Munir2 without proper attribution. On behalf of my co-authors, I apologize to Dr. Munir and his colleagues, and to the readers, reviewers, and editors of Anesthesia & Analgesia for our unintended plagiarism and request that our case report be retracted. Sushma Bhatnagar, MD Department of Anaesthesiology, Pain and Palliative Care Institute Rotary Cancer Hospital All India Institute of Medical Sciences, New Delhi, India [email protected] 1. Gupta D, Jain R, Mishra S, Kumar S, Thulkar S, Bhatnagar S. Ultrasonography reinvents the originally described technique for ganglion impar neurolysis in perianal cancer pain. Anesth Analg 2008;107:1390–2 2. Munir MA, Zhang J, Ahmad M. A modified needle-inside-needle technique for the ganglion impar block. Can J Anaesth 2004;51:915–7 Editor's Note I appreciate Dr. Bhatnagar's request for retraction of the case report “Ultrasonography reinvents the originally described technique for ganglion impar neurolysis in perianal cancer pain” 1 in Anesthesia & Analgesia due to the use of verbatim from a previous publication.2 The paper is hereby retracted. Steven L. Shafer, MD Editor-in-Chief, Anesthesia & Analgesia Professor of Anesthesiology, Columbia University 1. Gupta D, Jain R, Mishra S, Kumar S, Thulkar S, Bhatnagar S. Ultrasonography reinvents the originally described technique for ganglion impar neurolysis in perianal cancer pain. Anesth Analg 2008;107:1390–2 2. Munir MA, Zhang J, Ahmad M. A modified needle-inside-needle technique for the ganglion impar block. Can J Anaesth 2004;51:915–7