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Osteoid Osteoma: Elevation of Cardiac and Respiratory Rates at Biopsy Needle Entry into Tumor in 10 Patients¹

¹ From the Departments of Radiology (D.I.R.), Anesthesia (J.J.A.M.), and Orthopedic Surgery (F.J.H.), Harvard Medical School, Massachusetts General Hospital, 199 Cambridge St, Boston, MA 02114. Received November 29, 2001; revision requested February 18, 2002; revision received March 21; accepted May 7. Address correspondence to D.I.R. (e-mail: dirosenthal@partners.org).

View larger version (60K): [in a new window]   CT images and tracings of cardiac rate (in beats per minute) and respiratory rate (in breaths per minute) during percutaneous radio-frequency treatment of an osteoid osteoma after establishment of general anesthesia. Times A, B, and C marked on the tracings correspond to the needle positions shown on CT images A-C, respectively. Notice that (A) soft-tissue penetration and (B) drilling through periosteum and cortical bone elicit no response, but (C) puncture of the tumor causes a sudden marked increase in cardiac and respiratory rates. H = hour, MIN = minutes.