Primary Ewing Sarcoma/Primitive Neuroectodermal Tumor of Kidney With Inferior Vena Cava Thrombus: Findings on 18F-FDG PET/CT

18F-FDG PET/CT of Primary Extraskeletal Ewing Sarcoma of the Prostate

ABSTRACT

Prostate Ewing sarcoma is rare. We report the 18F-FDG PET/CT finding of a 16-year-old adolescent boy who presented with dysuria and was confirmed to be extraskeletal Ewing sarcoma of the prostate by histopathologic findings.

FDG PET/CT of Primary Ewing Sarcoma of the Peritoneum

ABSTRACT

Ewing sarcoma (ES), which is described as diffuse endothelioma of the bone, is divided into osseous and extraosseous ES mostly affecting children and adolescents. In addition, ES of the peritoneum is rare. We present a case of a 46-year-old man with ES of the peritoneum in whom FDG PET/CT showed high radiotracer activity in the primary tumor.

Primary Ewing Sarcoma of Seminal Vesicle on PET/CT

ABSTRACT

Ewing sarcoma is an aggressive malignancy that most often presents as an undifferentiated primary bone tumor; less commonly, it arises in extraosseous soft tissues of mesenchymal cell origin. Primary extraosseous involvement of seminal vesicle is rarely reported. Herein, we describe FDG PET/CT and MRI findings of a 55-year-old man who presented with a pelvic mass, which was confirmed to be primary Ewing sarcoma/primitive neuroectodermal tumor arising from seminal vesicle by histopathologic findings.