Primary hepatic lymphomas are rare hepatic malignancies which are often misdiagnosed preoperatively. Early accurate diagnosis is essential as the patients can be treated successfully with chemotherapy, eluding the need for surgery. We present a case of primary hepatic lymphoma which mimicked as focal nodular hyperplasia with normal biochemical tumor markers, and 18F-fluorodeoxyglucose (18F-FDG) whole-body positron emission magnetic resonance showed intense FDG uptake in the large hepatic lesion. The patient subsequently underwent right hepatectomy, and histopathology revealed diffuse large B cell lymphoma.

Multiple endocrine neoplasia 1 (MEN1) syndrome is an autosomal dominant syndrome comprising a triad of pancreatic, pituitary, and parathyroid tumors. Adrenal cortical carcinoma occurs rarely in MEN1 syndrome. Here, we have presented a case of a 62-year-old woman with adrenal mass and elevated serum parathormone levels, who underwent 68 Ga-DOTANOC PET/CT. 68 Ga-DOTANOC PET/CT showed intense tracer concentration in the left adrenal mass and lesions in the liver, pancreas, and peritoneum. Biopsy of the peritoneal deposit revealed metastatic adrenocortical carcinoma, and further genetic testing showed MEN1 mutation.

Warthin's tumor is a benign and frequently encountered salivary gland neoplasm. Bilaterality and multifocality are rare in Warthin's tumor. Synchronous cervical lymph nodal metastasis with unknown primary in a case of Warthin's tumor can raise a suspicion of primary malignancy of the parotid gland. We present a case of bilateral multifocal Warthin's tumor with synchronous squamous cell carcinoma metastasis to the cervical lymph node. 18F-fluorodeoxyglucose whole body positron emission tomography/computed tomography imaging showed hypermetabolic bilateral multifocal parotid lesions and metastatic cervical lymph node with unknown primary malignancy.