Variable patterns of positron emission tomography in the assessment of patients with extramammary Paget's disease.

Whole body 18 F-fluorodeoxyglucose (FDG) positron emission tomography was performed for staging in 7 extramammary Paget's disease patients and 4 tests showed mild FDG uptake at the primary sites. Histologically, all 4 tumors were found to be thicker than 2 cm. Among the 4 patients, 2 showed multiple hypermetabolic foci of skeletal metastasis and lymph node involvement.