Abstract
The rare ‘burned out’ phenomenon in germ cell tumors is known as the presence of an extragonadal germ cell tumor with a spontaneously regressed testicular tumor found in common metastatic sites, including the retroperitoneal, mediastinal, supraclavicular, cervical, and axillary lymph nodes; lung; and liver. We report a patient who presented with a retroperitoneal extragonadal germ cell tumor with a spontaneously regressed testicular tumor.
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Fig. 1
(A) Computed tomography (CT) of the retroperitoneum shows an enhanced mass (black arrow) with a lobulated margin and necrotic portion located between the pancreatic head and the inferior vena cava. (B) Proton emission tomography (PET) shows 2 hypermetabolic masses between the duodenum and the inferior vena cava (white arrow).
![kju-50-516f1.tif](/upload/SynapseXML/0020kju/thumb/kju-50-516f1.gif)
Fig. 2
Microscopic finding of a retroperitoneal mass shows seminoma cells with enlarged nucleoli in mitosis (black arrow) and many lymphocytes in the lobular septum (white arrow) (H&E, x400).
![kju-50-516f2.tif](/upload/SynapseXML/0020kju/thumb/kju-50-516f2.gif)
Fig. 3
(A) Ultrasonography of testis shows a segmental inhomogeneous lesion containing calcification in the atrophied right testis. (B) Magnetic resonance imaging (MRI) of testis shows a 33 mm ill-defined mass within the right testis that was not enhanced well and had heterogeneous low signal intensity on T2-weighted MRI.
![kju-50-516f3.tif](/upload/SynapseXML/0020kju/thumb/kju-50-516f3.gif)
Fig. 4
(A) Gross finding of the right testis shows a well-defined, light yellow, solid scar-like mass, measuring 3.9x2.8 cm. The mass has replaced most of the testis and was abutting the tunica albuginea. (B) Microscopic finding of the right testis shows a tubular hyalinization dominant pattern with intratubular germ cell neoplasia (H&E, x400).
![kju-50-516f4.tif](/upload/SynapseXML/0020kju/thumb/kju-50-516f4.gif)