RÉSUMÉ
18F-FDG whole-body positron emulsion tomography (18F-FDG PET) has become an established imaging modality for a variety of cancers. Today, 18F-FDG PET is utilized to differentiate benign from malignant non-functioning adrenal masses. In this report, a 25-year-old woman presented with a 2-month history of left flank pain. Abdominal CT revealed a left 6.5 x 4.5 cm adrenal mass with regular margins and focal calcification. To make a differential diagnosis, 18F-FDG PET was performed. Preoperative laboratory studies showed that the mass was non-functioning. A left adrenalectomy was performed through a left subcostal incision. The final pathologic evaluation revealed adrenal oncocytoma. We present the disassociation between preoperative 18F-FDG PET and pathologic findings of a benign adrenocortical oncocytoma.
Sujet(s)
Adénome oxyphile/imagerie diagnostique , Adénome oxyphile/anatomopathologie , Tumeurs de la surrénale/imagerie diagnostique , Tumeurs de la surrénale/anatomopathologie , Tomographie par émission de positons/méthodes , Adénome oxyphile/chirurgie , Tumeurs de la surrénale/chirurgie , Surrénalectomie/méthodes , Adulte , Diagnostic différentiel , Faux positifs , Femelle , Fluorodésoxyglucose F18 , Études de suivi , Humains , Immunohistochimie , Stadification tumorale , Soins préopératoires/méthodes , Résultat thérapeutiqueRÉSUMÉ
Monostotic Paget's disease of the patella was detected with Tc-99m MDP and Tl-201 scans. Diffuse intense uptake of MDP in the left patella was observed on the blood-pool and late phases of the bone scan. Tl-201 imaging was performed to differentiate a malignant process and showed diffuse marked accumulation at the same site. Semiquantitative analysis of the patella region on both Tc-99m MDP and Tl-201 scans did not support a diagnosis of cancer. Radiographs showed the features of Paget's disease of the bone. Findings of a pathologic evaluation were compatible with the diagnosis of osteitis deformans. This case represents the unusual skeletal involvement of monostotic Paget's disease of the bone in the patella. Tl-201 accumulation in the Paget's lesion was suggested to be caused by increased metabolic activity of the lesion but was not indicative of a malignant process.
Sujet(s)
Maladie de Paget des os/imagerie diagnostique , Patella/imagerie diagnostique , Radio-isotopes du thallium , Sujet âgé , Tumeurs osseuses/diagnostic , Diagnostic différentiel , Femelle , Humains , Scintigraphie , Radiopharmaceutiques , Médronate de technétium (99mTc)RÉSUMÉ
Ga-67 and abdominal CT scans of a 72-year-old woman who had malignant lymphoma before, during, and after gallium nitrate/hydroxyurea combination therapy are presented. Disappearance of Ga-67 uptake by the tumor during this treatment despite continuing CT evidence of disease and reappearance of Ga-67 scan abnormalities after cessation of therapy suggests that caution should be exercised when interpreting results of Ga-67 scintigraphy for the detection of tumor viability during gallium nitrate/hydroxyurea therapy.
Sujet(s)
Antinéoplasiques/usage thérapeutique , Radio-isotopes du gallium , Gallium/usage thérapeutique , Hydroxy-urée/usage thérapeutique , Leucémie chronique lymphocytaire à cellules B/imagerie diagnostique , Leucémie chronique lymphocytaire à cellules B/traitement médicamenteux , Sujet âgé , Antinéoplasiques/administration et posologie , Protocoles de polychimiothérapie antinéoplasique/usage thérapeutique , Femelle , Gallium/administration et posologie , Humains , Hydroxy-urée/administration et posologie , Scintigraphie , TomodensitométrieSujet(s)
Érection du pénis/physiologie , Pénis/vascularisation , Pénis/imagerie diagnostique , Humains , Mâle , Papavérine/pharmacologie , Érection du pénis/effets des médicaments et des substances chimiques , Scintigraphie , Débit sanguin régional/effets des médicaments et des substances chimiques , Technétium , Radio-isotopes du xénonRÉSUMÉ
A patient with parathyroid cancer is presented who underwent Tc-99m MIBI scintigraphy. The Tc-99m MIBI image demonstrated increased accumulation of activity at the lower pole of the left thyroid lobe which was later confirmed as a parathyroid cancer. Uptake by parathyroid cancer must be kept in mind as a cause of increased Tc-99m MIBI accumulation when a disease is in question in the thyroid or parathyroid gland.