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[Benign hemorrhagic renal cyst: a case report].

Y Kobayashi¹, Y Yasunaga, K Matsumiya

¹Department of Urology, Osaka National Hospital.

Hinyokika Kiyo. Acta Urologica Japonica

|June 1, 1991

Summary

A giant hemorrhagic renal cyst was surgically removed from a 64-year-old man. Pathological examination confirmed the cyst was benign, ruling out malignancy despite initial imaging concerns.

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Area of Science:

Urology
Radiology
Pathology

Background:

Giant renal cysts can present as abdominal masses, necessitating thorough diagnostic evaluation.
Distinguishing benign hemorrhagic cysts from renal tumors is clinically significant.

Observation:

A 64-year-old male presented with a left upper abdominal mass.
Imaging revealed a giant left renal cystic mass with thick, irregular walls and heterogeneous contents.
Renal arteriography indicated a hypervascular area, and MR imaging suggested a hemorrhagic cyst.

Findings:

Radical nephrectomy was performed due to suspicion of malignancy.
The resected specimen was a large (18 x 12 x 8 cm, 1,170 g) hemorrhagic renal cyst.
Histopathological examination confirmed the absence of any malignant tumor in the cyst wall.

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Implications:

This case highlights the importance of comprehensive imaging and pathological analysis in diagnosing renal cystic lesions.
Benign hemorrhagic renal cysts can mimic malignant tumors, leading to potentially unnecessary radical surgeries.
Accurate diagnosis is crucial for appropriate patient management and avoiding overtreatment.