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We report the accumulation of 99mTc-TRODAT-1 in the region of subacute cerebral ischemic infarction in an 81-year-old woman with Parkinson disease. The dopamine transporter SPECT imaging was performed on the 15th day after the onset of acute cerebral ischemic clinical symptoms. Overexpression of dopamine transporters after infarction in subacute phase may explain the accumulation.
We report the accumulation of 99mTc-TRODAT-1 in the region of subacute cerebral ischemic infarction in an 81-year-old woman with Parkinson disease. The dopamine transporter SPECT imaging was performed on the 15th day after the onset of acute cerebral ischemic clinical symptoms. Overexpression of dopamine transporters after infarction in subacute phase may explain the accumulation.
A 69-year-old man with history of metastatic neuroendocrine tumor presented for initial staging with 68Ga-DOTATE PET/CT. 68Ga-DOTATATE PET/CT showed incidental focal increased DOTATATE uptake in the left apical prostate tissue, which was thought to be of benign etiology. Digital rectal examination later was consistent with a palpable nodule along with elevated prostate-specific antigen of 7.0 ng/mL. MRI of prostate demonstrated a 3.8-cm lesion followed by a targeted biopsy that revealed prostatic acinar adenocarcinoma. Chronic inflammatory cell infiltrates were also noted on biopsy, and this may have been the cause of increased DOTATATE uptake seen on 68Ga-DOTATATE PET/CT study.
A 69-year-old man with history of metastatic neuroendocrine tumor presented for initial staging with 68Ga-DOTATE PET/CT. 68Ga-DOTATATE PET/CT showed incidental focal increased DOTATATE uptake in the left apical prostate tissue, which was thought to be of benign etiology. Digital rectal examination later was consistent with a palpable nodule along with elevated prostate-specific antigen of 7.0 ng/mL. MRI of prostate demonstrated a 3.8-cm lesion followed by a targeted biopsy that revealed prostatic acinar adenocarcinoma. Chronic inflammatory cell infiltrates were also noted on biopsy, and this may have been the cause of increased DOTATATE uptake seen on 68Ga-DOTATATE PET/CT study.
Primary adenosquamous carcinoma (ASC) of the liver is a rare subtype of intrahepatic cholangiocarcinoma. Hepatic ASC consists of both adenocarcinoma and squamous cell carcinoma components. Because hepatic ASC is extremely rare, only a few cases describing the imaging findings of hepatic ASC were reported before. Herein, we present FDG PET/CT findings of hepatic ASC in a 78-year-old woman who was admitted to hospital with a 4-week history of right upper quadrant pain.
Primary adenosquamous carcinoma (ASC) of the liver is a rare subtype of intrahepatic cholangiocarcinoma. Hepatic ASC consists of both adenocarcinoma and squamous cell carcinoma components. Because hepatic ASC is extremely rare, only a few cases describing the imaging findings of hepatic ASC were reported before. Herein, we present FDG PET/CT findings of hepatic ASC in a 78-year-old woman who was admitted to hospital with a 4-week history of right upper quadrant pain.
FDG PET/CT in an 18-year-old man with known familial hemophagocytic lymphohistiocytosis (HLH) type 2 demonstrated abnormally in the brain, liver, and lymph nodes. Pathology showed no sign of lymphoproliferative disease. The patient underwent the chemotherapy of HLH. Six months after chemotherapy, a follow-up FDG PET/CT did not show any abnormal 18F-FDG activity, suggesting a complete response. The present case shows FDG PET/CT might not only be useful in staging the familial HLH but also able to evaluate the therapy response.
FDG PET/CT in an 18-year-old man with known familial hemophagocytic lymphohistiocytosis (HLH) type 2 demonstrated abnormally in the brain, liver, and lymph nodes. Pathology showed no sign of lymphoproliferative disease. The patient underwent the chemotherapy of HLH. Six months after chemotherapy, a follow-up FDG PET/CT did not show any abnormal 18F-FDG activity, suggesting a complete response. The present case shows FDG PET/CT might not only be useful in staging the familial HLH but also able to evaluate the therapy response.
A 56-year-old woman presented with right iliac fossa pain. Abdominal CT showed a mesenteric mass in the right iliac fossa, adjacent to the vena cava inferior and right ureter. Biopsy of the mass revealed a well-differentiated neuroendocrine tumor. 68Ga-DOTATATE PET/CT showed strong somatostatin receptor expression only within in a small, central area of this mesenteric mass, with faint 68Ga-DOTATATE uptake in the majority of this mesenteric mass. K-975 Pathology revealed an IgG4-positive storiform fibrosis surrounding a mesenteric adenopathy. 68Ga-DOTATATE PET/CT discriminates between neuroendocrine tumor lymph node metastases and fibrosis, hereby avoiding potential sampling error of tumor biopsies and guiding surgical approach.
A 56-year-old woman presented with right iliac fossa pain. Abdominal CT showed a mesenteric mass in the right iliac fossa, adjacent to the vena cava inferior and right ureter. Biopsy of the mass revealed a well-differentiated neuroendocrine tumor. 68Ga-DOTATATE PET/CT showed strong somatostatin receptor expression only within in a small, central area of this mesenteric mass, with faint 68Ga-DOTATATE uptake in the majority of this mesenteric mass. Pathology revealed an IgG4-positive storiform fibrosis surrounding a mesenteric adenopathy. 68Ga-DOTATATE PET/CT discriminates between neuroendocrine tumor lymph node metastases and fibrosis, hereby avoiding potential sampling error of tumor biopsies and guiding surgical approach.
Tri-alkoxysalicyl-1,4-diazepan-6-amine (TAoS-DAZA) ligands, radiolabelled with 68Ga, have been proposed as PET/CT agents for depiction and quantification of hepatobiliary function and evaluation of bile excretion. In the presented case, a patient with hepatocellulary carcinoma underwent PET/CT with the TAoS-derivate 68Ga-tri-methoxysalicyl-(TMoS)-DAZA to determine the patency of intrahepatic and extrahepatic bile ducts, in particular of a stent in the common bile duct. The PET/CT was performed without complications. Evaluation of bile excretion over time was possible. 68Ga-TAoS-DAZA PET/CT may be an option for dynamic imaging of the excretory hepatic function to visualize the biliary tree and to rule out cholestasis.
Tri-alkoxysalicyl-1,4-diazepan-6-amine (TAoS-DAZA) ligands, radiolabelled with 68Ga, have been proposed as PET/CT agents for depiction and quantification of hepatobiliary function and evaluation of bile excretion. In the presented case, a patient with hepatocellulary carcinoma underwent PET/CT with the TAoS-derivate 68Ga-tri-methoxysalicyl-(TMoS)-DAZA to determine the patency of intrahepatic and extrahepatic bile ducts, in particular of a stent in the common bile duct.
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