A case of Castleman's disease that presented as a retroperitoneal mass.
BACKGROUND
A 35-year -old man presented to a local emergency room with acute left-flank pain and a medical history of nephrolithiasis. There were no aggravating or relieving factors for the left-flank pain and no other presenting symptoms, and the physical examination was unremarkable.


METHODS
Complete blood count, urinalysis, serum tumor markers, scrotal ultrasonography, CT scan of the abdomen (with and without contrast), MRI of the abdomen.


METHODS
Unicentric Castleman's disease (hyaline-vascular type).


RESULTS
Surgical exploration and excision. Pathologic and immunohistochemical work-up confirmed the diagnosis. CT scan after 7 months was normal with no evidence of recurrence.
Vora
Kinjal
K
Department of Surgery, Division of Urology, Memorial Sloan Kettering Cancer Center, New York, NY 10021, USA.
Dash
Atreya
A
Bach
Ariadne
A
Gopalan
Anuradha
A
Russo
Paul
P
D000328:Adult; D001707:Biopsy, Needle; D005871:Castleman Disease / Q000175:diagnosis* / Q000601:surgery*; D003937:Diagnosis, Differential; D005500:Follow-Up Studies; D006801:Humans; D007150:Immunohistochemistry; D008279:Magnetic Resonance Imaging; D008297:Male; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis* / Q000601:surgery*; D018570:Risk Assessment; D014057:Tomography, X-Ray Computed