PMC3325740_01
Magnetic resonance imaging of the retroperitoneal bronchogenic cyst T2 weighted (HASTE TE=60 m/sec) image in the coronal plane demonstrating a multilocular mass in the retroperitoneum on the left side. High and intermediate signal intensities (arrows) are demonstrated in the different loculi. The lesion is abutting from the upper pole of the left kidney.
rt-2012-1-e13-g001.jpg
PMC3325740_01_rt-2012-1-e13-g001.jpg
F1
Further radiological exploration by means of ultrasound (US), computed tomography (CT) and magnetic resonance imaging (MRI) revealed a multilocular left adrenal mass. (Figure 1) The lesion did not sign on positron emission tomography (PET) scan.
Macroscopic view of a cross section of the retroperitoneal bronchoigenic cyst. A multicystic lesion located between the adrenal (A) and the diaphragm (D, marked with a suture).
rt-2012-1-e13-g002.jpg
PMC3325740_01_rt-2012-1-e13-g002.jpg
F2
The lesion consisted of cysts with diameters ranging from 0,6 to 2,5 cm, filled with mucoid or gelatinous material (Figure 2).
Microscopic view (hematoxylineosin, x5) of the retroperitoneal bronchogenic cyst. Cystic spaces lined by columnar epithelium (arrowheads), cartilage (C) and mucoid acini (arrow).
rt-2012-1-e13-g003.jpg
PMC3325740_01_rt-2012-1-e13-g003.jpg
F3
In addition, some alveolar-like structures were noted (Figure 3).
A microscopic view of the retroperitoneal bronchogenic cyst: spaces lined by epithelium showing nuclear immunoreactivity for the transcription factor TTF-1 (nuclei showing as round brown dots, x10).
rt-2012-1-e13-g004.jpg
PMC3325740_01_rt-2012-1-e13-g004.jpg
F4
TTF-1 (a transcription factor present in lung and thyroid) (Figure 4). The lesion was diagnosed as a bronchogenic cyst.