[Thymic uptake of 18FFDG following radioiodine ablation therapy]. / Captación de 18F-FDG en timo tras terapia ablativa de restos tiroideos con 131I.

We report the case of a 47 year-old woman with a history of non-Hodgkin's lymphoma. During the course of her disease, we performed various (18F)FDG PET/CT that identified several significant incidental findings. First, we incidentally identified a hypermetabolic nodule in the left thyroid lobe, whose final diagnosis was differentiated thyroid carcinoma. Second, metabolic activity was visualized in the thymus secondary to ablative treatment with radioiodine. This uptake disappeared in subsequent studies. Several papers have reported thymic rebound following chemotherapy but we have found only one case report of (18F)FDG uptake after radioiodine treatment. On the other hand, this case is of interest because it supports the benefit of studying the hypermetabolic thyroid nodules incidentally detected on the PET/CT performed for other reasons.

[Utility of diuretic renography in the detection of an enteroureteral fistula]. / Utilidad del renograma diurético en la detección de una fístula enteroureteral.

After a 2-year-old male with left impairment underwent surgery for a left vesicoureteral stenosis, his renal function was followed up by means of dynamic renal scintigraphy with 99mTc-DTPA. Incidental radiotracer accumulation was observed in left hemiabdomen tracing the descending and sigmoid colon. A vesico-colonic fistula was suspected. However, ultrasonography and cystography studies showed no presence of a vesico-enteric fistula. Because the patient persisted without symptoms, an expectant approach was adopted. One year later, he began to suffer watery diarrhoea episodes. 99mTc-DTPA renography was again performed to re-evaluated renal function and explore presence of urinary-enteric fistula. Diuretic renography demonstrated the presence of a vesical leak to sigmoid gut, which was confirmed by recovery of fecal matter from the patient. Both isotopic renograms evidenced the presence of uretero-sigmoid fistula, an uncommon postsurgical that was not detected by cystography, ultrasonography or RMN. The patient subsequently underwent surgery for fistula repair.

[Bone scintigraphy with 99mTc-MDP in a patient with acute lymphoblastic leukemia initially diagnosed of Still's disease]. / Gammagrafía ósea con 99mTc-MDP en un paciente con leucemia aguda linfoblástica diagnosticado inicialmente de enfermedad de Still.

We present a 43-year-old male, who was admitted with the diagnosis of Adult-onset Still's disease, after several months of arthralgias, febricula and loss of weight. Chest x-ray, abdominal ultrasonography, chest, abdomen and pelvic CT scan and bone scintigraphy were performed. Scintigraphic findings oriented to the performance of a bone marrow biopsy with diagnosis of acute lymphoblastic leukemia.

Gammagrafía ósea con 99mTc-MDP en un paciente con leucemia aguda linfoblástica diagnosticado inicialmente de enfermedad de Still / Bone scintigraphy with 99mTc-MDP in a patient with acute lymphoblastic leukemia initially diagnosed of Still’s disease

Presentamos el caso de un varón de 43 años, que ingresa con el diagnóstico de enfermedad de Still, tras varios meses aquejado de artralgias, febrícula y pérdida de peso. Se realizan radiografía de tórax, ecografía abdominal, TC de tórax, abdomen y pelvis con contraste y gammagrafía ósea. Los hallazgos gammagráficos orientan hacia la realización de punción de médula ósea con el diagnóstico de leucemia linfoblástica aguda

We present a 43-year-old male, who was admitted with the diagnosis of Adult-onset Still's disease, after several months of arthralgias, febricula and loss of weight. Chest x-ray, abdominal ultrasonography, chest, abdomen and pelvic CT scan and bone scintigraphy were performed. Scintigraphic findings oriented to the performance of a bone marrow biopsy with diagnosis of acute lymphoblastic leukemia