Herein, we describe the first case of renal intravascular large B cell lymphoma in Korea occurring in a 66-year-old female. She presented with mild fever and dyspnea. On physical and laboratory evaluations, hemophagocytic lymphohistiocytosis was suspected, but the bone marrow biopsy results were unremarkable. During the work-up, massive proteinuria developed, which led to a renal biopsy. The renal architecture was relatively well-preserved, but the glomeruli were hypercellular with the infiltration of atypical, large lymphoid cells with increased nucleus-cytoplasm ratio and clumped chromatin. Similar cells were also present in the peritubular capillaries. The tumor cells exhibited membranous staining for CD20 and CD79a. After the diagnosis of intravascular large B cell lymphoma, the patient received rituximab-based chemotherapy under close follow-up.

Objective: Criminal proceedings of medical accidents are increasing gradually, and convictions are also on the rise. This study examined the precedents to determine how to prevent medical lawsuits from the perspective of criminal law. Methods: This study collected the criminal precedents of emergency treatment from January 2012 to December 2021. The emergency care in the Integrated Search and Access Service for Judgement was searched online. Results: In 2,371 cases, 22 precedents of professional negligence resulting in death or injury were extracted. These 22 cases were analyzed to understand the legal perspective of the judgment. Of those 22 cases, there were convictions in 10 cases of criminal precedents of emergency treatment and 12 acquittals within the last 10 years. There were four cases where the accused were guilty in the first trial but acquitted in the second. On the other hand, there was one case in which the accused was acquitted in the first trial but convicted in the second. Conclusion Having basic legal knowledge and concepts to prevent medical accidents is helpful. In an inevitable medical accident, it is necessary to actively deal with it from the beginning to prevent significant damage. In addition, it is important to review recent medical trials and to update procedures where possible.

Background/Aims: Although the use of surveillance 18F-fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) is discouraged in patients with diffuse large B-cell lymphoma, its usefulness in different subtypes has not been thoroughly investigated. Methods: We retrospectively evaluated 157 patients who showed positive results on surveillance FDG-PET/CT every 6 months following complete response for up to 5 years. All of the patients also underwent biopsies. Results: Seventy-eight (49.6%) of 157 patients had true positive results; the remaining 79 (50.3%), including eight (5.1%) with secondary malignancies, were confirmed to yield false positive results. Among the 78 patients with true positive results, the disease in seven (8.9%) had transformed to a different subtype. The positive predictive value (PPV) of FDG-PET/CT for aggressive B-cell non-Hodgkin’s lymphoma (NHL) was lower than that for indolent B-cell or aggressive T-cell NHL (p = 0.003 and p = 0.018, respectively), especially in patients with a low/low-intermediate international prognostic index (IPI) upon a positive PET/CT finding. On the other hand, indolent B-cell and aggressive T-cell NHL patients showed PPVs of > 60%, including those with low/low-intermediate secondary IPIs. Conclusions The role of FDG-PET/CT surveillance is limited, and differs according to the lymphoma subtype. FDG-PET/CT may be useful in detecting early relapse in patients with aggressive T-cell NHL, including those with low/low-intermediate risk secondary IPI; as already known, FDG-PET/CT has no role in aggressive B-cell NHL. Repeat biopsy should be performed to discriminate relapse or transformation from false positive findings in patients with positive surveillance FDG-PET/CT results.

PURPOSE: Although hepatitis B surface antigen (HBsAg)–negative, hepatitis B core antibody (anti-HBc)–negative patients are not considered to be at risk for hepatitis B virus (HBV)–related hepatitis, the actual risk remains to be elucidated. This study aimed to evaluate the risk of HBV-related hepatitis in HBsAg-negative, anti-HBc–negative patients receiving autologous stem cell transplantation (ASCT) for multiple myeloma (MM) or malignant lymphoma. MATERIALS AND METHODS: We retrospectively reviewed data from 271 HBsAg-negative patients (161 anti-HBc–negative and 110 anti-HBc–positive at the time of ASCT) who received ASCT for MM or lymphoma. The risk of HBV-related hepatitis was analyzed according to the presence of anti-HBc. HBV serology results at the time of ASCT were compared with those at the time of diagnosis of MM or lymphoma. RESULTS: Three patients (two anti-HBc–negative MMs and one anti-HBc–positive MM) developed HBV-related hepatitis after ASCT. The rate of HBV-related hepatitis did not differ among patients with or without anti-HBc status (p=0.843). HBV-related hepatitis more frequently occurred in MM patients than in lymphoma patients (p=0.041). Overall, 9.1% of patients (16.7% with MM and 5.4% with lymphoma) who were HBsAg–negative and anti-HBc–positive at the time of diagnosis had lost anti-HBc positivity during chemotherapy prior to ASCT. CONCLUSION: Our data suggest that HBsAg-negative, anti-HBc–negative patients at the time of ASCT for MM or lymphoma still might be at a risk for HBV-related hepatitis.
Diagnosis ; Drug Therapy ; Hepatitis B Surface Antigens ; Hepatitis B virus ; Hepatitis B* ; Hepatitis* ; Humans ; Lymphoma* ; Multiple Myeloma* ; Retrospective Studies ; Stem Cell Transplantation* ; Stem Cells*