IgG4-related disease and isolated retroperitoneal fibrosis: A narrative review.

Retroperitoneal fibrosis (RPF) can occur due to many etiologies and is categorized into idiopathic and secondary. Etiologies of secondary RPF include medications, autoimmune disease, malignancy, and IgG4-related disease (IgG4-RD). Although IgG4-RD usually involves multiple systems synchronically including the pancreas, aorta, and kidneys, it can present with isolated RPF without involvement of other organ systems. Caution must be exercised in these instances as the diagnosis should be confirmed based on specific clinical, radiographic, and histopathologic criteria. Such confirmation can affect the work-up and therapeutic approach as treatment with corticosteroids can lead to remission, both clinically and radiographically.

Nationwide analysis of adult hospitalizations with hematologic malignancies and systemic sclerosis.

Introduction Systemic sclerosis (SSc) is a connective tissue disease with multi-system involvement and it has an increased risk of developing hematologic malignancies. This study aims to report the association between hematologic malignancies with SSc and to characterize in-hospital demographics and outcomes in patients with hematologic malignancies with and without SSc. Methods We performed a retrospective review of pooled data from the National Inpatient Sample (NIS) database from 2016 to 2020. Crude prevalence of hematologic malignancies among hospitalized patients with and without SSc was calculated. Logistic regression was used for statistical significance of differences in prevalence while adjusting for confounders. Demographic characteristics and outcomes of patients with hematologic malignancies with and without SSc was compared. Statistical analysis was done using chi-square and multivariate logistic regression. Results Among all adult hospitalizations, the prevalence of hematologic malignancy was 1.87% compared to 2.66% among patients with SSc (adjusted odds ratio (aOR) 1.52, p <0.01). Relative to the non-SSc group, the SSc group had higher odds of in-patient mortality (OR 1.43; 95% confidence interval (CI) 1.11 - 1.87; p<0.01). The prevalence of lymphoma was 0.71% compared to 1.04% among patients with SSc (aOR 1.6, p < 0.01). Relative to the non-SSc group, the lymphoma-SSc group had similar odds of in-patient mortality (OR 0.93; 95% CI 0.55 - 1.59; p=0.80). The prevalence of leukemia was 0.79% compared to 1.28% among patients with SSc (aOR 1.74, p < 0.01). The leukemia-SSc group had higher odds of in-patient mortality (OR 1.78; 95% CI 1.29 - 2.46; p<0.01). For myeloma, there was no difference in the prevalence in adults with and without SSc (0.4 vs. 0.38%, aOR 0.96, p=0.64) and there was no difference of in-hospital mortality. Conclusions There is a positive significant association between hematologic malignancies including lymphoma and leukemia, and SSc. This association was not seen between myeloma and SSc. There is increased in-hospital mortality of patients with leukemia and SSc.

Primary angiitis of the central nervous system and reversible cerebral vasoconstriction syndrome: analysis of the National Inpatient Sample.

INTRODUCTION: Primary angiitis of the central nervous system (PACNS) and reversible cerebral vasoconstriction syndrome (RCVS) are two rare syndromes that affect the cerebral vasculature. Both conditions have been shown to cause severe neurologic complications. Distinguishing these two conditions in clinical practice is often challenging. Here, we compare the clinical features and outcomes of RCVS and PACNS hospitalizations against the general adult inpatient population. MATERIALS AND METHODS: We conducted a retrospective review of hospitalizations with a diagnosis of PACNS or RCVS from 2016 to 2018 in the National Inpatient Sample (NIS) database. Multivariate analysis was performed to calculate adjusted odds ratios (ORadj) for hospital outcomes. RESULTS: In the NIS, 3305 hospitalizations had a diagnosis of RCVS and 6035 hospitalizations had a diagnosis of PACNS. RCVS hospitalizations had a significantly greater association with cerebral aneurysms (ORadj 23.80), hemiplegia/hemiparesis following subarachnoid hemorrhage (SAH) (ORadj 324.09), ischemic stroke (ORadj 7.59), and nontraumatic SAH (ORadj 253.61). PACNS hospitalizations had a significantly greater association with hemiplegia/hemiparesis following cerebrovascular accident (CVA) (ORadj 6.16), ischemic stroke (ORadj 11.55), nontraumatic SAH (ORadj 7.29), seizure (ORadj 2.49), and in-hospital mortality (ORadj 2.85). CONCLUSIONS: We performed an analysis of the NIS to better understand RCVS and PACNS hospitalizations. Severe neurologic events including CVA and SAH were elevated in both, but SAH and related hemiplegia/hemiparesis were extremely common among RCVS hospitalizations. In-hospital mortality was elevated in PACNS but not RCVS. This information can be used to help clinicians better understand, distinguish, and diagnose these conditions. Key Points • Despite clear description of RCVS and PACNS in the medical literature, there remains a scarcity of national population-based studies comparing these two entities against the general adult inpatient population. • This study aims to fill knowledge gaps in this area. • Here, we compare the clinical features and outcomes of RCVS and PACNS hospitalizations against the general adult inpatient population.