Fluorine-fluorodeoxyglucose PET-CT findings in a case of rarely seen metastatic adult extrarenal Wilms' tumor of retroperitoneum presenting as lower limb edema.

Wilms' tumor also called as nephroblastoma is commonly seen extracranial solid tumor involving kidneys in children. Rarely, Wilms' tumor can arise from ectopic nephrogenic remnants located outside the kidneys. Extrarenal Wilms' tumor comprises 3% of total Wilms' tumor with its incidence even less common in adults.

18F-FDG PET/CT Findings in a Rare Case of Paraneoplastic Vestibulocerebellar Syndrome Associated With Isolated Antiamphiphysin Antibodies.

Paraneoplastic cerebellar degeneration (PCD) is an immune-mediated neurological disease characterized by adaptive immune response against onconeural antigens physiologically expressed in the cerebellum. It is characterized by presence of highly specific onconeural autoantibodies such as anti-Yo, anti-Hu, anti-Ri, and anti-Ma2 in the serum and cerebrospinal fluid as diagnostic biomarkers. Antiamphiphysin autoantibody-related paraneoplastic encephalitis is a less commonly seen autoimmune neurological disorder usually presenting as stiff person syndrome.

Squamous Cell Carcinoma of Thymus Presenting as Constrictive Pericarditis Diagnosed With 18F-FDG PET/CT.

Constrictive pericarditis refers to focal or global thickening of pericardium causing impedance to diastolic filling and increased systemic venous pressure. We discuss a case of thymic carcinoma presenting as constrictive pericarditis. A 70-year-old man experiencing shortness of breath underwent Doppler echocardiography for further evaluation.