We report port site and distant metastases of unsuspected gallbladder cancer after laparoscopic cholecystectomy diagnosed by positron emission tomography (PET) in two patients. Patient 1, a 72-year-old woman was diagn...We report port site and distant metastases of unsuspected gallbladder cancer after laparoscopic cholecystectomy diagnosed by positron emission tomography (PET) in two patients. Patient 1, a 72-year-old woman was diagnosed as cholelithiasis and cholecystitis and received laparoscopic cholecystectomy. Unsuspected gallbladder cancer was discovered with histological result of well-differentiated squamous cell carcinoma of the gallbladder inf iltrating the entire wall. A PET scan using F-18-fl uorodeoxyglucose (FDG- PET) before radical resection revealed residual tumor in the gallbladder fossa and recurrence at port site and metastases in bilateral hilar lymph nodes. Patient 2, a 69-year-old woman underwent laparoscopic cholecystectomy more than one year ago with pathologically confi rmed unsuspected adenosquamous carcinoma of stage pT1b. At 7-mo follow-up after surgery, the patient presented with nodules in the periumbilical incision. Excisional biopsy of the nodule revealed adenosquamous carcinoma. The patient was examined by FDG-PET, demonstrating increased FDG uptake in the right lobe of the liver and mediastinal lymph nodes consistent with metastatic disease. This report is followed by a discussion about the utility of FDG-PET in the gallbladder cancer.展开更多
The Positron Emission Tomography (PET) applying the coincidence detection of the two 7-photons emitted by the annihilation of positron-electron pair can be used to image tumor with a high spatial resolution (<4 mm)...The Positron Emission Tomography (PET) applying the coincidence detection of the two 7-photons emitted by the annihilation of positron-electron pair can be used to image tumor with a high spatial resolution (<4 mm)[1]. But the cost of PET is proportional to its dimension. A compact PET detector camera was developed. Fig.1 shows the schematic diagram of the experimental measurement setup. Two detectors consist展开更多
文摘We report port site and distant metastases of unsuspected gallbladder cancer after laparoscopic cholecystectomy diagnosed by positron emission tomography (PET) in two patients. Patient 1, a 72-year-old woman was diagnosed as cholelithiasis and cholecystitis and received laparoscopic cholecystectomy. Unsuspected gallbladder cancer was discovered with histological result of well-differentiated squamous cell carcinoma of the gallbladder inf iltrating the entire wall. A PET scan using F-18-fl uorodeoxyglucose (FDG- PET) before radical resection revealed residual tumor in the gallbladder fossa and recurrence at port site and metastases in bilateral hilar lymph nodes. Patient 2, a 69-year-old woman underwent laparoscopic cholecystectomy more than one year ago with pathologically confi rmed unsuspected adenosquamous carcinoma of stage pT1b. At 7-mo follow-up after surgery, the patient presented with nodules in the periumbilical incision. Excisional biopsy of the nodule revealed adenosquamous carcinoma. The patient was examined by FDG-PET, demonstrating increased FDG uptake in the right lobe of the liver and mediastinal lymph nodes consistent with metastatic disease. This report is followed by a discussion about the utility of FDG-PET in the gallbladder cancer.
文摘The Positron Emission Tomography (PET) applying the coincidence detection of the two 7-photons emitted by the annihilation of positron-electron pair can be used to image tumor with a high spatial resolution (<4 mm)[1]. But the cost of PET is proportional to its dimension. A compact PET detector camera was developed. Fig.1 shows the schematic diagram of the experimental measurement setup. Two detectors consist
