Recently, carcinoma has been reported in association with anal fistulae in Crohn disease (CD), and carcinomas may rarely arise in chronic fistula in the anorectum [2,3]. Consequently, the concern for malignancy should be raised when the imaging findings of a soft mass, mass-like thickening of the wall of the anorectum, or malignant- appearing lymphadenopathy are present during evaluation of the anorectum for suspected benign inflammatory disease. OR aMedstar Georgetown University Hospital, Washington, District of Columbia. bCleveland Clinic, Cleveland, Ohio. cPanel Chair, University of Wisconsin Hospital & Clinics, Madison, Wisconsin. dPanel Vice-Chair, University of California San Diego, San Diego, California. eMayo Clinic, Rochester, Minnesota, American Gastroenterological Association. fBoston University Medical Center, Boston, Massachusetts. gMedstar Georgetown University Hospital, Washington, District of Columbia, Primary care physician. hH. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida. iVirginia Tech Carilion School of Medicine, Roanoke, Virginia. jMassachusetts General Hospital, Boston, Massachusetts. kOregon Health and Science University, Portland, Oregon. lDuke University Medical Center, Durham, North Carolina. mEmory University, Atlanta, Georgia. nUniversity of Alabama at Birmingham, Birmingham, Alabama. oUniversity of California San Diego, San Diego, California. pUniversity of California San Francisco, San Francisco, California. qCleveland Clinic Florida, Weston, Florida, American College of Surgeons. rSpecialty Chair, Virginia Commonwealth University Medical Center, Richmond, Virginia. The American College of Radiology seeks and encourages collaboration with other organizations on the development of the ACR Appropriateness Criteria through society representation on expert panels. Participation by representatives from collaborating societies on the expert panel does not necessarily imply individual or society endorsement of the final document.
Anorectal Disease. Recently, carcinoma has been reported in association with anal fistulae in Crohn disease (CD), and carcinomas may rarely arise in chronic fistula in the anorectum [2,3]. Consequently, the concern for malignancy should be raised when the imaging findings of a soft mass, mass-like thickening of the wall of the anorectum, or malignant- appearing lymphadenopathy are present during evaluation of the anorectum for suspected benign inflammatory disease. OR aMedstar Georgetown University Hospital, Washington, District of Columbia. bCleveland Clinic, Cleveland, Ohio. cPanel Chair, University of Wisconsin Hospital & Clinics, Madison, Wisconsin. dPanel Vice-Chair, University of California San Diego, San Diego, California. eMayo Clinic, Rochester, Minnesota, American Gastroenterological Association. fBoston University Medical Center, Boston, Massachusetts. gMedstar Georgetown University Hospital, Washington, District of Columbia, Primary care physician. hH. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida. iVirginia Tech Carilion School of Medicine, Roanoke, Virginia. jMassachusetts General Hospital, Boston, Massachusetts. kOregon Health and Science University, Portland, Oregon. lDuke University Medical Center, Durham, North Carolina. mEmory University, Atlanta, Georgia. nUniversity of Alabama at Birmingham, Birmingham, Alabama. oUniversity of California San Diego, San Diego, California. pUniversity of California San Francisco, San Francisco, California. qCleveland Clinic Florida, Weston, Florida, American College of Surgeons. rSpecialty Chair, Virginia Commonwealth University Medical Center, Richmond, Virginia. The American College of Radiology seeks and encourages collaboration with other organizations on the development of the ACR Appropriateness Criteria through society representation on expert panels. Participation by representatives from collaborating societies on the expert panel does not necessarily imply individual or society endorsement of the final document.