Retroperitoneal Castleman's disease in the perinephric space--imaging appearance: a case report and a review of the literature.
BACKGROUND
Castleman's disease (CD) is a rare lymphoid tumour usually found in the mediastinum. Extrathoracic sites are uncommon. Its radiological findings may be similar to other retroperitoneal tumours, making diagnosis difficult.


METHODS
A 54-year-old female was found to have an incidental hypoechoic mass in the left posterior perinephric space on routine ultrasound. Abdominal computed tomography (CT) scan demonstrated an isodense mass which enhanced brightly with intravenous contrast. Angiogram confirmed a hypervascular mass.


METHODS
The retroperitoneal mass was excised.


RESULTS
Histology revealed CD of hyaline-vascular type.


CONCLUSIONS
CD should be considered in the differential diagnosis of a retroperitoneal mass, which demonstrates homogeneous and intense enhancement.
Teh
H S
HS
Department of Radiology, Changi General Hospital, 2 Simei Street 3, Singapore 529889.
Lin
M B
MB
Tan
A S
AS
Tan
T Y
TY
Chin
C M
CM
D001707:Biopsy, Needle; D005871:Castleman Disease / Q000175:diagnosis* / Q000601:surgery; D003287:Contrast Media; D019160:Endosonography / Q000379:methods; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D018810:Magnetic Resonance Angiography; D008875:Middle Aged; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis* / Q000601:surgery; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome
D003287:Contrast Media