Cíl. Prezentovat neobvyklý případ náhodného nálezu karcinomu tlustého střeva při 18F-FDG (fluordeoxyglukóza) PET/CT u 47leté ženy s pozitivní anamnézou carcinoma corporis uteri po léčbě, která byla vyšetřována pro podezřelé hypoechogenní ložisko na játrech dle utrasonografie. Metoda. Celotělový PET/CT byl proveden za 60 minut po intravenózní aplikaci 18F-FDG (392 MBq - 5 MBq/kg). Akviziční čas PET skenu činil 2.5 minuty na projekci, celkem 7 projekcí. CT sken proběhl ve venózní fázi s intravenózním (80 ml Iomeron 400) a perorální kontrastem (1000 ml Manitol 2%). Výsledky. PET/CT nově zjistilo náhodný, neočekávaný tumor (průměr 22 mm) s intenzivní akumulací 18F-FDG v lienální flexuře tlustého střeva, bez přítomnosti regionálních či vzdálených metastáz. Nález na játrech byl normální. Následně provedená koloskopie s odběrem vzorků potvrdila přítomnost karcinomu tlustého střeva. Pacientka podstoupila levostrannou hemikolektomii, při které byl nádor odstraněn a byla předána k dalšímu onkologickému sledování. Závěr. 18F-FDG PET/CT vyšetření umožnilo detekovat karcinom tlustého střeva v časném stadiu, provést úspěšnou chirurgickou léčbu a radikálně změnit prognózu pacientky. Dále 18F-FDG PET/CT zkrátilo dobu diagnostického procesu., Aim. To present a rare case report of the accidental colon carcinoma finding on 18F-FDG PET-CT in a 47-year-old woman with positive history carcinoma corporis uteri after treatment. Method. The patient underwent PET-CT with 18F-FDG for a small hypoechogenic lesion by follow-up abdomen ultrasound in a liver near gallbladder bed. The whole body PET-CT was obtained 60 minutes after intravenous injection of 18F-FDG (392 MBq - 5 MBq/kg). The PET scan acquisition time was 2.5 minutes per bed position. Contrast-enhanced CT (venous phase) provided both full CT evaluation (including intravenous and oral contrast) and PET attenuation correction. Results. The examination revealed 18F-FDG PET-CT positive, accidental tumour in the lienal flexure of the colon without regional or distant metastases and normal liver finding. The subsequent coloscopy and biopsy was performed and exulcerated colon carcinoma was proven by histopathology The patient underwent hemicolectomy and tumour was removed. Conclusion. PET-CT led to detection of the colon carcinoma in the early stage and subsequent successful surgery treatment and radically changed the patient prognosis and improved patients management., and Jiří Doležal, Eva Plodrová, Jaroslav Vižďa
The clinical outcome of 153 Graves' disease patients treated with a wide dose range of radioactive iodine-131 (RAI) was analyzed retrospectively. Six to nine months after the first dose of RAI 60 patients (39%) were hypothyroid (or rather thyroxine-substituted) and 26 (17%) were euthyroid, while 67 patients (44%) did not respond properly: in 32 (21%) their antithyroid drug (ATD) dose could be reduced but not withdrawn (partial response) and 35 (23%) remained hyperthyroid or the same dose of ATD was necessary (no response). The outcome did not correspond significantly to the administered activity of RAI (medians 259, 259, 222, and 259 MBq for hypothyroid, euthyroid, partial, and no response subgroups, respectively), or the activity retained in the gland at 24 h (medians 127, 105, 143, and 152 MBq). The effect was, however, clearly, and in a stepwise pattern, dependent on initial thyroid volume (17, 26, 33 and 35 ml, P < 0.001) or activity per gram tissue retained at 24 h (6.02, 4.95, 4.75, and 4.44 MBq/g, P = 0.002). Also, higher residual level of thyrotoxicosis at the time of RAI treatment was connected with worse outcome. The dose-dependency of outcome was further analyzed. When our sample was divided into tertiles, according to the adjusted dose, the same modest success rates (47%) were seen in the lower and middle tertiles. However, doses higher than 5.88 MBq/g (the upper tertile) resulted in success rate of 75%. Finer division into decils has shown a threshold-like increase in cure rate between the 7th and the 8th decil. In the first 7 decils (doses ≤ 6 MBq/g) the complete response rate was 45 to 50%, in the 8th decil (6.0 to 7.8~MBq/g) it rose to 80% and was not further increased with increasing dose. Direct comparison of higher (> 6 MBq/g, cure rate 80%) and lower (≤ 6 MBq/g, cure rate 46%) doses gave highly significant difference (P < 0.001). With our dosing range we found a dose-dependent clinical outcome that suggests an optimum delivered dose near 6.5 MBq/g, resulting in successful treatment of ca 80% patients. and J. Čepková, J. Horáček, J. Vižďa, J. Doležal