Objectives-We aimed to determine how the hemodynamic parameters of the superior mesenteric artery are affected in mesenteric panniculitis.Methods-Twenty-one patients with a diagnosis of mesenteric panniculitis on computed tomography were evaluated with duplex Doppler sonography. The control group consisted 20 asymptomatic volunteers. The peak systolic velocity, enddiastolic velocity (EDV), resistive index (RI), pulsatility index (PI), blood flow volume, and body mass index were measured in the group of patients with mesenteric panniculitis, and the findings were compared with those of the control group.Results-The mean blood flow volume and EDV were significantly higher in the patient group: The mean superior mesenteric artery blood flow volume 6 SD was 917.86 6 228.97 mL/min in the patient group versus 389.73 6 92.72 mL/min in the control group (P < .001). The mean EDV was 31.56 6 8.44 m/s in the patient group versus 19.27 6 4.19 m/s in the control group (P < .001). The mean RI and PI were significantly lower in the patient group: The mean RI was 0.81 6 0.04 in the patient group versus 0.85 6 0.03 in the control group (P 5 .001). The mean PI was 2.69 6 0.68 in the patient group versus 3.81 6 1.13 in the control group (P 5 .001). the mean superior mesenteric artery diameter was 7.30 6 0.67 mm in the patient group versus and 6.46 6 0.66 mm in the control group (P < .001). The mean BMI was 27.95 6 3.80 kg/m 2 in the patient group versus 23.16 6 3.47 kg/m 2 in the control group (P < .001).Conclusions-In patients with mesenteric panniculitis, the Doppler spectrum of the superior mesenteric artery shows detectable changes, which are characterized by decreased vascular resistance and increased blood flow.Key Words-Doppler (abdominal); duplex Doppler sonography; mesenteric panniculitis; superior mesenteric artery M esenteric panniculitis is a rare disorder that is characterized by inflammation of the mesenteric adipose tissue. 1 This disorder most commonly involves the mesentery of the small bowel, but the mesocolon may also be occasionally involved. 2,3 The etiology of mesenteric panniculitis remains unclear. The disease may occur in isolation, or it may be associated with other disorders. 1 The suggested causes of mesenteric panniculitis include autoimmune disorders, infection, trauma, prior abdominal surgery, and ischemia of the mesentery. 4,5 Mesenteric panniculitis has also been associated

ObjectiveThe aim of this prospective study was to evaluate pre- and post-treatment MRI and CT findings of osteoid osteoma (OO) patients treated with radiofrequency thermo-ablation (RFTA) and to compare these findings with visual analog scale (VAS) scores.MethodsSixteen patients (4 females and 12 males; mean age of 18.87 ± 8.75 years (range: 8–37)) with OO were examined with CT and MRI, at baseline and at an average of 3 months following the procedure. On pre- and post-procedural CT and MRIs, OO-related findings were recorded. Treatment success was evaluated with VAS scores.ResultsBaseline VAS scores were 8 or 9 and follow-up scores were 0 or 1, indicating no early recurrences.Nidus diameters decreased significantly after the procedure (p = 0.027, p = 0.002, and p = 0.002; and p = 0.001, p = 0.001, p = 0.001 for AP, ML and CC nidus diameters for CT and MRI, respectively).The mean nidus volume were significantly decreased after the procedure (p = 0.001, for CT and MRI).On post-procedural images, cortical thickening, the signal intensity and contrast enhancement of the nidus and the extent of periostitis were significantly decreased (p = 0.019, p = 0.001, p = 0.001 and p = 0.034, respectively). There was no significant change in nidus calcification, perinidal cortical and intramedullary sclerosis, periosteal reaction, bone deformity, bone marrow and soft tissue edema, joint effusion and synovitis after the procedure (p = 0.253, p = 0.062, p = 0.245, p = 1, p = 1, p = 0.429, p = 0.371, p = 0.625, p = 1).ConclusionAlthough the changes in imaging findings may be helpful in early follow-up of OO patients treated with RFTA, these changes alone cannot be used with accuracy in predicting treatment response.Level of EvidenceLevel IV, Therapeutic Study.

1Renal cell carcinoma (RCC) accounts for approximately 3% of malignancies and 80-90% of malignant neoplasms of the kidney in adults. The incidence of RCC continues to increase. Due to widespread use of cross-sectional imaging modalities, small and localized tumors are now being detected at an early stage. Percutaneous image-guided thermal ablation for early stage RCC is a minimally invasive technique that has rapidly gained acceptance as an alternative to surgery. This technique provides a low incidence of complications, shorter operative-time, protection of renal function, lack of inherent surgery risks, and shorter hospital stay while remaining an effective method of adequate destruction of tumor tissue. The current ablation techniques include cryoablation, radiofrequency ablation (RFA), high-intensity focused ultrasound and microwave ablation (MWA). Image-guided percutaneous MWA has been effectively and safely applied to treat renal tumors in select patients. In contrast to RFA, percutaneous MWA has the advantage of providing higher temperatures in a shorter time. Thus, MWA allows a more uniform tumor necrosis than RFA. The indications for renal MWA include T1a or T1b tumors (≤4 cm or 4-7 cm), patients with multiple comorbidities who are poor candidates for resection, a tumor in a solitary kidney, bilateral renal tumors, hereditary renal tumors, renal insufficiency, von Hippel-Lindau syndrome, and palliative treatment of hematuria. In conclusion, percutaneous MWA appears to be a safe and effective treatment option for T1a and T1b tumors and for patients who are poor surgical candidates. Keywords: Microwave ablation, Percutaneous, Renal cell carcinoma Renal hücreli karsinom (RHK) yetişkin malignitelerinin yaklaşık %3'ünü, renal malignitelerin ise %80-90'ını oluşturmaktadır. RHK insidansı artmaya devam etmektedir. Kesitsel görüntüleme yöntemlerinin yaygın kullanımı ile küçük ve lokalize tümörler günümüzde erken dönemde saptanabilmektedir. Görüntüleme eşliğinde perkütan termal ablasyon, erken evre RHK'nin tedavisinde cerrahi tedaviye bir alternatif olarak kabul görmüştür. Bu teknik düşük komplikasyon riski, azalmış operasyon zamanı, renal fonksiyonların korunması, cerrahiye bağlı risklerin önüne geçmesi ve kısa hastanede kalış süresi gibi avantajlar sağlamaktadır. Termoablasyon teknikleri kriyoablasyon, radyofrekans ablasyon (RFA), yüksek intensiteli odaklı ultrason, mikrodalga ablasyon (MWA) gibi yöntemleri içerir. Görüntüleme eşliğinde perkütan MWA seçilmiş hastalarda renal tümörlerin tedavisinde güvenli ve etkili bir yöntem olarak uygulanabilir. RFA'ya kıyasla MWA ile daha kısa sürelerde daha yüksek sıcaklık değerlerine ulaşılabilir. Böylelikle MWA, RFA'ya kıyasla daha üniform bir tümör nekrozu sağlar. Renal MWA endikasyonları; T1a ve T1b tümörler (≤4 cm or 4-7 cm), komorbid hastalığı olan cerrahi rezeksiyon için uygun olmayan hastalar, soliter böbrekte tümör, bilateral renal tümörler, kalıtsal renal tümörler, renal yetmezlik, von Hippel Lindau hastalığı ve hematüri palyasyonunu içerir. Sonuç olarak, perkütan...