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[Retroperitoneal bronchogenic cyst: a case report].
Norio Takahashi1, Husao Murakami, Hiroyuki Umeda
1Department of Urology, Yonezawa City Hospital.
Summary
A rare retroperitoneal bronchogenic cyst was diagnosed in a 50-year-old man. Surgical resection confirmed the congenital anomaly, highlighting its unusual location outside the typical mediastinal or lung areas.
Area of Science:
- Medical Case Reports
- Surgical Pathology
- Diagnostic Imaging
Background:
- Bronchogenic cysts are rare congenital anomalies originating from the primitive foregut.
- Typically, these cysts are found in the mediastinum or lung parenchyma.
- Extrapulmonary or extrathoracic presentations are exceptionally uncommon.
Observation:
- A 50-year-old male presented with a retroperitoneal mass adjacent to the left kidney and spleen.
- Computed tomography and magnetic resonance imaging revealed a 4 cm cystic mass.
- Definitive diagnosis was not achievable via imaging alone.
Findings:
- Surgical resection of the retroperitoneal mass was performed.
- The mass was an unilocular cyst containing mucinous fluid.
- Histopathological examination revealed a cyst wall with respiratory epithelium, mucus glands, and cartilage, confirming a bronchogenic cyst.
Implications:
- This case expands the known spectrum of bronchogenic cyst locations.
- It underscores the importance of considering rare diagnoses in cases of unexplained retroperitoneal masses.
- Highlights the diagnostic utility of histopathology when imaging is inconclusive.