Endothelial microparticles (EMPs) belong to a family of extracellular vesicles that are dynamic, mobile, biological effectors capable of mediating vascular physiology and function. The release of EMPs can impart autocrine and paracrine effects on target cells through surface interaction, cellular fusion, and, possibly, the delivery of intra-vesicular cargo. A greater understanding of the formation, composition, and function of EMPs will broaden our understanding of endothelial communication and may expose new pathways amenable for therapeutic manipulation.

We report a case of a 51-year-old male with past medical history significant for cholangiocarcinoma presented with two weeks of worsening bilateral lower extremity swelling and erythema. Patient has been on active chemotherapy for his cholangiocarcinoma with Gemcitabine weekly infusions. Physical exam was significant for bilaterally petechial rash coalescing into ecchymoses over the dorsum of the feet, sparing soles and toes, which dissipated into thinning petechiae more proximally. On labs he did not have any leukocytosis, his platelet count was 50 × 10/µL and basic metabolic panel was benign. Patient was started on Vancomycin for presumed cellulitis. Lower extremity ultrasound Doppler ruled out deep venous thrombosis. Patient did have biopsies bilaterally on his legs, which showed hypersensitivity reaction consistent with the diagnosis of pseudocellulitis. His Vancomycin was discontinued and his symptoms improved. Our case further supports that pseudocellulitis is underrecognized and underreported, potentially leading to unnecessary antibiotic exposure and unnecessary diagnostic work-up as seen unfortunately in our patient. Unnecessary antibiotic exposure is increasing the risk for clostridium difficile and or antibiotic resistance, therefore awareness of this reaction is critical, as to avoid unnecessary antibiotics, and costly diagnostic workups.

Atrial fibrillation (AF), a common arrhythmia that occurs with increasing frequency in the aging population, is associated with increased mortality and morbidity. To ensure that patients receive adequate anticoagulant prophylaxis, clinical guidelines for anticoagulation advocate use of validated scoring systems to stratify patients by cardiovascular risk and predict the individual patient's risk of adverse effects of therapy. Recently approved oral anticoagulants-a direct thrombin inhibitor and the factor Xa inhibitors-may offer advantages over the 50-year standard, warfarin, for efficacy, safety, and ease of administration. Clinical trial experience with the newly approved agents and others, yet to be approved, will define their relative value in reducing the risk of thromboembolism associated with AF. This article discusses issues that may help clinicians choose among these newer agents and individualize treatment appropriately. Clinical VignetteA 52-year-old woman with a history of hypertension, diabetes mellitus, advanced emphysema, on long-term oxygen therapy with normal renal and left ventricular function, and diagnosed with atrial fibrillation of more than 2 days duration has decided to pursue a rate control strategy after discussions with her physician. She is reluctant to use warfarin because of the need for frequent monitoring, and is keen to know about the newer oral anticoagulants for atrial fibrillation. Which anticoagulant would be ideal for this patient?

Testicular cancer is seen commonly in young males and has a high cure rate if diagnosed and treated early. It clinically presents with painless testicular swelling. We discuss the case of a young previously healthy male with an aggressive testicular cancer which started with a testicular swelling but the primary site underwent necrosis secondary to its own vascular demand thus giving the false impression of resolution, but not before metastasizing to the rest of the body. With this case, we aim to highlight the importance of increasing awareness of testicular cancer and its presenting symptoms in young males and the need to overcome the stigma around the evaluation of testicular swellings.

No abstract