Role of F18 fluorodeoxyglucose positron-emission tomography/computed tomography in the management of Askin's tumor
A 14-year-old boy presented with a history of pain in the right chest for 2 months. Fine-needle aspiration from the lesion was consistent with PNET and he was referred for F-18 FDG PET/CT for initial staging of the disease. Intense FDG uptake (SUVmax 12.6) was seen in a circumscribed heterogeneously enhancing soft-tissue mass (measuring 13.0 cm × 11.7 cm × 8.0 cm) in the right hemithorax, arising from the chest wall [Figure –]. Areas of photopenia were seen within the mass, suggestive of necrosis. The adjacent posterior part of the 6th rib was directly infiltrated by the lesion. Tracer uptake was also seen in the metaphyseal region of the right humerus and left 2nd rib with mild sclerotic changes (not shown), suggestive of metastases. The patient did not respond to chemotherapy and expired after 9 months.