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The Diagnostic Role of Radionuclide Imaging in Evaluation of Patients with Nonhypersecreting Adrenal Masses

Medicina Nucleare e Radiodiagnostica, Istituto Nazionale dei Tumori, Napoli; and Centro per la Medicina Nucleare del Consiglio Nazionale delle Ricerche, Università Federico II, Napoli, Italy

View larger version (85K): [in a new window]   FIGURE 1. Patient with nonhypersecreting left adrenal adenoma. (A) T1-weighted (repetition time/echo time = 600/15) abdominal MR axial scan shows round left adrenal mass. (B) Abdominal posterior view of norcholesterol image shows round area of tracer uptake in left adrenal bed; diffuse physiologic activity is present in liver and through left bowel.

View larger version (76K): [in a new window]   FIGURE 2. Patient with nonhypersecreting right adrenal pheochromocytoma. (A) T1-weighted (repetition time/echo time = 600/15) abdominal MR axial scan shows round right adrenal mass. (B) Abdominal posterior view of MIBG image shows round area of intense tracer uptake in right adrenal bed.

View larger version (81K): [in a new window]   FIGURE 3. Patient with nonhypersecreting right adrenal carcinoma. (A) T1-weighted (repetition time/echo time = 600/15) abdominal MR coronal scan shows right adrenal mass. (B) Uncorrected abdominal coronal FDG PET scan shows intense tracer uptake by right adrenal lesion; significant physiologic activity is detectable in both renal pelves.

View larger version (43K): [in a new window]   FIGURE 4. Patient with left adrenal metastasis from lung. (A) Postcontrast abdominal CT scan shows inhomogeneous left adrenal lesion. Round cystic lesion of left kidney is detectable. (B) Uncorrected whole-body FDG PET image shows abnormal increased tracer uptake by adrenal mass, primary lung tumor, and lymph nodal metastases of mediastinum; physiologic activity is present in heart as well as in neck and pelvic muscular tissues.