Background and Aims: Radioimmunotherapy (RIT) appears as one of the most effective treatment options for patients with relapsed or resistant non-Hodgkin's lymphoma (NHL). Our aim was to evaluate the role of pre-RIT ¹⁸F-fluorodeoxyglucose-positron emission tomography/computed tomography (FDG-PET/CT) as an early predictor of ⁹⁰Y-Ibritumomab tiuxetan treatment response. Methods: We included consecutive 20 patients with relapsed NHL (10 males; mean age, 58.5±8.9 years old) who were treated with ⁹⁰Y-Ibritumomab tiuxetan. FDG-PET/CT was performed before and after treatment. Semiquantitative parameters of all measurable FDG-avid lesions were measured and averaged. A measurable FDG-avid lesion was defined as a lesion that showed FDG uptake higher than liver with a diameter more than 1cm. Treatment response was determined by visual assessment based on a five-point score criteria from FDG-PET/CT after treatment. Results: Fourteen patients (70%) were classified as responders and the other six patients (30%) as non-responders. All semiquantitative parameters except for MTV demonstrated significantly lower values in the responders compared with the non-responders (p<0.05). Conclusions: Semiquantitative evaluation by SUVmax, SUVpeak, and TLG before treatment were useful as early predictors of ⁹⁰Y-Ibritumomab tiuxetan treatment response.

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We reported a case of right renal cell carcinoma in a 72-year-old man treated with robot-assisted partial nephrectomy with retroperitoneal approach. Clinical stage was cT1aN0M0. Tumor size was 24 mm. We performed RAPN with transperitoneal approach in the initial 28 patients between May 2016 and June 2017 in our hospital. As RAPN with transperitoneal approach was difficult in this patient owing to a history of abdominal surgery of colon cancer and cholelithiasis, we selected RAPN with retroperitoneal approach. The surgery was performed safely and without any complications. The operative time was 188 minutes, console time was 49 minutes, and warm ischemia time was 23 minutes. The pathological diagnosis was clear cell carcinoma, pT1a, negative margins. He was discharged on postoperative day 6. RAPN with retroperitoneal approach is effective for patients with intraabdominal adhesion.

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A male patient in his 60s who developed sudden diarrhea with abdominal pain was diagnosed with acute enterocolitis and received conservative treatment; however, his symptoms did not improve, and evaluation by computed tomography (CT) revealed an intraabdominal needle-like foreign body and abscess surrounded by an inflammatory mass. No signs of peritoneal irritation were observed. The patient reported a habit of holding a wooden toothpick in his mouth. The mass was removed by open abdominal surgery. Gross examination revealed that the needle-like foreign body was a wooden toothpick. Thus, surgical diagnosis was small intestinal perforation by a wooden toothpick. The patient was discharged 13 days after surgery.

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A 14-year-old-boy presented with pain and a lump on his left lower leg. Magnetic resonance imaging (MRI) revealed a medullary lesions on T1-weighted images and medullary enhancement after contrast injection. Bone marrow biopsy with curettage revealed an active marrow without evidence of malignancy or infection. The patient had acne on his face and legs. Accordingly, he was diagnosed with chronic recurrent multiple osteomyelitis (CRMO) syndrome. A few months later, the patient developed shoulder joint pain, remittent fever, and an erythematous rash accompanied by a high fever. Blood tests revealed elevated levels of CRP (10.2 mg/dL) and ferritin (557 ng/mL), and hypoalbuminemia (2.8 g/dL). A second bone marrow biopsy revealed hemophagocytosis, but no malignancies. Subsequently, a diagnosis of systemic juvenile idiopathic arthritis (s-JIA) was established.

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