Mislow, John M. K.Slotkin, JonathanProctor, Mark2011-02-222009Mislow, John M. K., Jonathan R. Slotkin, and Mark R. Proctor. 2009. Ovarian teratoma masquerading as a CSF pseudocyst in a female with a ventriculoperitoneal shunt. Case Reports in Medicine 2009: 240705.1687-9627http://nrs.harvard.edu/urn-3:HUL.InstRepos:4729254Background: In today's fast-paced and high-acuity emergency departments, clinicians are often compelled to triage cases so rapidly that a differential diagnosis consistent with the history and physical examination is not comprehensive. Case Report: This case report describes the unexpected finding of a cystic ovarian neoplasm in a young female with an abdominal mass and a ventriculoperitoneal shunt, initially diagnosed as a cerebrospinal fluid pseudocyst. We use this case to illustrate that the astute clinician must always synthesize a diagnosis from all data sources and not to rely on initial radiographic evaluations. Conclusions: This remarkable case demonstrates that all differential diagnoses must be entertained in order to rapidly and accurately diagnose a patient with a cystic abdominal mass.en-USJournal Article2011-02-2210.1155/2009/240705