[Castleman's disease: isolated retroperitoneal mass. Report of a case].
OBJECTIVE
To describe a rare case of vascular hyaline variant of Castleman's disease presenting as a solitary mass, with special reference to the radiological findings and differential diagnosis. The literature is briefly reviewed.


RESULTS
A 48-year-old male presented with nonspecific pain in the left flank. Routine analyses were unremarkable. Sonographic and CT studies showed a well-defined, highly vascularized, 3.3 x 3.6 x 4 cm retroperitoneal mass. The risk of hemorrhage made a preoperative biopsy impracticable and the mass was removed surgically. The pathological analysis of the surgical specimen showed a localized retroperitoneal angiofollicular lymphoid hyperplasia (vascular hyaline variant).


CONCLUSIONS
Castleman's disease can rarely present as a solitary retroperitoneal mass, which must be distinguished from primary retroperitoneal masses that are usually malignant. Imaging techniques are not conclusive. Definitive diagnosis is based on the postoperative pathological findings.
González Sánchez
F J
FJ
Servicio de Radiología y Urología, Hospital Santos Reyes, Aranda de Duero, Burgos.
Landeras Alvaro
R M
RM
Encinas Gaspar
M B
MB
Napal Lecumberri
S
S
D005871:Castleman Disease / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012187:Retroperitoneal Space
Enfermedad de Castleman: masa única retroperitoneal. A propósito de un caso.