title: Distinguishing post-treatment changes from recurrent disease in cholangiocarcinoma: a case report.
abstract: BACKGROUND
  Three-dimensional techniques for radiotherapy have expanded possibilities for partial volume liver radiotherapy. Characteristic, transient radiographic changes can occur in the absence of clinical radiation-induced liver disease after hepatic radiotherapy and must be distinguished from local recurrence.
  
  
  METHODS
  In this report, we describe computed tomography changes after chemoradiotherapy for cholangiocarcinoma as an example of collaboration to determine the clinical significance of the radiographic finding.
  
  
  CONCLUSIONS
  Because of improved three-dimensional, conformal radiotherapy techniques, consultation across disciplines may be necessary to interpret post-treatment imaging findings.
authors.affiliation: Department of Radiation Oncology, Thomas Jefferson University, Philadelphia, Pennsylvania, USA. timothy.showalter@jeffersonhospital.org
authors.forename: Timothy N
authors.initials: TN
authors.lastname: Showalter
authors.forename: A Omer
authors.initials: AO
authors.lastname: Nawaz
authors.forename: Frederick M
authors.initials: FM
authors.lastname: Fellin
authors.forename: Pramila R
authors.initials: PR
authors.lastname: Anne
authors.forename: Ernest L
authors.initials: EL
authors.lastname: Rosato
authors.forename: Adam P
authors.initials: AP
authors.lastname: Dicker