Background and Objectives: Thymomas are associated with a high frequency of paraneoplastic manifestations. Paraneoplastic syndrome (PNS) with thymoma presents a challenge to clinicians because of the need to decipher the association between the presenting symptoms and the underlying tumor. The condition most commonly noted in patients with PNS with thymoma is myasthenia gravis. Other common autoimmune diseases that may present as PNS include systemic lupus erythematosus, pure red cell aplasia, and Good syndrome. Seventy-six percent of patients with PNS-associated thymoma experience resolution of PNS after curing thymoma. Materials and Methods: A 37-year-old man with a two-month fever accompanied by polyarthritis accidently found thymoma after contrast computed tomography scans of his chest. He accepted Video assisted thoracoscopic surgery with resection of thymoma. Results: Fever and polyarthritis resolved after operation but recurred in five days due to cytomegalovirus viremia, which might be predisposed by previous antibiotics treatment before the diagnosis of thymoma. Conclusion: Patients with a thymoma also have a high frequency of PNS, and the most frequent condition found in patients with PNS-associated thymoma is myasthenia gravis. Fever with polyarthritis has been rarely reported as a symptom of PNS-associated thymoma. Here we reported an unusual case of PNS mimicking reactive arthritis with thymoma, as diagnosed based on the patient’s clinical progression, imaging examination, and laboratory tests. The patient died of his comorbidities, and his death may have been related to long-term antibiotic use and consequent intestinal dysbiosis. This challenging case may help to inform clinicians of the need for detailed work-up of fever with unknown origin in the presence of chronic polyarthritis to prevent the overdiagnosis of inflammatory arthritis or rheumatic disease and avoid further comorbidities. Detailed work-up should include the patient’s history of infections, inflammation, and malignant or nonmalignant tumors.

This paper develops a bi-directional converter for electrical vehicle battery testing that has fast dynamic response for meeting various battery test requirements. The proposed converter consists of two bi-directional stages, including a front end and second stage. The front end is a three-phase AC-DC converter under charging mode operation. It becomes a DC-AC converter that recovers energy. The second stage is a bi-directional DC-DC converter which simulates the charge and discharge battery behavior.A transient load compensator (TLC) is proposed to provide a fast dynamic response. This special feature reduces the DC-link voltage fluctuation and thereby avoids potential front stage current trip. Furthermore, this fast front end dynamic performance significantly improves the current tracking capability of the DC-DC converter, which simulates the battery charge and discharge behavior. The dynamic current battery behavior used in the EV can therefore be truly reflected by the presented battery simulator. These claims are fully confirmed by experimental results derived from a fully digitally controlled battery simulator for a 6kW/250V EV battery.

CIC-DUX4 sarcoma is highly aggressive and rapidly develops lethal metastatic disease and chemoresistance. Its histology is similar to that of Ewing sarcoma and other small round cell sarcomas. Correlation with clinical data, radiological findings, pathological results (including immunohistochemistry and fluorescence in situ hybridization), and/or molecular techniques is necessary. We present the case of a 44-year-old woman who was initially diagnosed as having high-grade undifferentiated round cell sarcoma confirmed to be a CIC-DUX sarcoma by next-generation sequencing.