Detection of Rare Gallbladder Microperforation by 18F-FDG PET/CT in a Patient with Maxillary Sinus Cancer

Gallbladder perforation is one of the most serious complications of cholecystitis and is rarely seen in 2-11% of cases. Pericholecystic abscesses secondary to gallbladder perforation are rare. Rapid diagnosis is important because of high morbidity and mortalityrates. A subcapsular abscess secondary to gallbladder microperforation is presented on 18F-fluorodeoxyglucose positron emission tomography/computed tomography performed for restaging in a patient with maxillary sinus cancer.

18F-FDG PET/CT and 68Ga-DOTATATE PET/CT Findings of Polycystic Kidney-derived Paraganglioma

Paragangliomas (PGLs) are neuroendocrine tumors originating from the neural crest. They usually arise from the adrenal medulla and sympathetic or parasympathetic ganglions. Approximately 10% of PGLs are located in the extra-adrenal gland. Renal PGL is a rare condition. In this case report, we present the 18F-fluorodeoxyglucose positron emission tomography/computed tomography (PET/CT) and 68Ga-DOTATATE PET/CT findings of polycystic kidney-derived PGL.

18 F-FDG PET/CT Imaging Findings in Adult-Onset Rasmussen Encephalitis

ABSTRACT

Rasmussen encephalitis is a rare condition characterized by chronic, progressive encephalitis. Typically, it involves one cerebral hemisphere and manifests through intractable epileptic seizures. Its occurrence in adults is notably infrequent. In this case, we presented the observations from an 18 F-FDG PET/CT scan of a 70-year-old man diagnosed with Rasmussen encephalitis, where MRI displayed nonspecific findings.

Bilateral Adrenal Metastasis of Prostatic Adenocarcinoma on 68 Ga-PSMA PET/CT Imaging

ABSTRACT

An 84-year-old man with prostate adenocarcinoma underwent 68 Ga-PSMA PET/CT due to PSA recurrence. Foci of 68 Ga-PSMA uptake were observed in bilateral adrenal glands. Adrenal MRI showed metastasis only in the left adrenal gland. Metastatic 68 Ga-PSMA uptake was also observed in the mediastinum and bone. Enzalutamide treatment was started. Follow-up 68 Ga-PSMA PET/CT scan showed regression in both adrenal gland metastases and other metastases.

68Ga PSMA PET/CT and 18F FDG PET/CT Findings in Osteonecrosis of the Jaw Induced by Denosumab

Breast cancer, prostate cancer, kidney cancer, multiple myeloma, osteoporosis, and the use of antiresorptive and antiangiogenic drugs are risk factors for osteonecrosis of the jaw (ONJ). Denosumab is a Receptor activator of nuclear factor kappa-Β ligand antagonist monoclonal antibody that inhibits the differentiation and function of osteoclasts over osteoblasts. It is an antiresorptive drug used to reduce the development of skeletal events in solid cancers. Denosumab-induced ONJ is a rare condition, occurring in 0% to 4.6% of cases. In this case, the findings of 68Ga prostate specific membrane antigen (PSMA) positron emission tomography (PET)/Computed Tomography (CT) and 18F Fluorodeoxyglucose (FDG) PET/CT are presented in a man with metastatic castration-resistant prostate cancer who developed ONJ due to denosumab use.