Don't cancel the surgery just yet! A case report of positive preoperative pregnancy test due to a soft tissue sarcoma production of ectopic beta human chorionic gonadotropin.

Soft tissue sarcomas are a rare group of mesenchymal malignancies which can range from low to high grade. These tumors have different clinical, radiographic, and histopathological characteristics. Beta human chorionic gonadotropin is a naturally secreted hormone by placental syncytiotrophoblast cells during pregnancy. On very rare occasions, sarcomas can develop the ability to ectopically produce human chorionic gonadotropin. Very few cases exist in the literature of soft tissue sarcomas expressing this hormone. We report the case of a 55-year-old female who presented with a posterior thigh soft tissue sarcoma who on the day of surgical resection was found to have an unusually elevated serum human chorionic gonadotropin. Positive immunohistochemical staining of the resected mass confirmed the sarcoma as the source of the beta human chorionic gonadotropin

Thin filament pyrometry of bio-fuels on a counter-flow burner

Paper presented at the 9th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Malta, 16-18 July, 2012.As a result of increasing greenhouse gases and decreasing petroleum supplies, new fuel sources such as bio-fuels have emerged with the potential to partially replace fossil fuels. The goal of this study is to characterize and verify the combustion and emission properties of different bio-fuels such as ethanol and propanol at different equivalence ratios. Using an electric pre-heater, the fuel is vaporized and premixed with air leading to combustion in a counter-flow tubular flat flame burner at atmospheric pressure and under laminar conditions. Thin filament pyrometry technique has been used to measure the temperature profiles across the flame. In this technique, silicon carbide fibers with the diameter of 15 µm have been used along with a blue color Schott glass filter and custom white balance to yield similar red, green, and blue intensities along the fibers. Calibration of the pyrometer was accomplished using B-type thermocouple measurements. The pyrometer calibration is valid between 1350 and 1500 °C.dc201

Leukocyte chemotactic factor 2 (LECT2) amyloidosis presenting as pulmonary-renal syndrome: a case report and review of the literature.

Leukocyte chemotactic factor-2 (LECT2) amyloidosis has been described as being associated with kidney disease; however, no clinical manifestations outside of the kidney have been previously reported. We describe a patient presenting with pulmonary-renal syndrome found to have deposition of amyloidogenic LECT2 (ALECT2) within both the lung and the kidney. This case is unique in regard to both the patient's clinical presentation of pulmonary-renal syndrome in the setting of amyloidosis and the biopsy finding of ALECT2 deposition within the lung. It also emphasizes the importance of tissue diagnosis in such cases, given that amyloidosis was not initially considered in the differential diagnosis

A new eruption of bullous pemphigoid following mRNA COVID-19 vaccination

The rapid development and implementation of COVID-19 vaccines throughout the global population has given rise to unique, rare, adverse skin reactions. This case report describes an elderly man with new-onset bullous pemphigoid following the second dose of the Pfizer-BioNTech (mRNA) COVID-19 vaccine

Epithelioid Osteoblastoma of the Proximal Femur in a 19-Year-Old Female: A Case Report and Review of Literature.

IntroductionEpithelioid osteoblastomas are an extremely rare entity infrequently seen in the resection of benign bone tumors. First described in the early 20thcentury, it has only been reported a handful of times throughout literature. Although these tumors can present similarly to malignant bone lesions, it is important for an experienced pathologist to differentiate epithelioid osteoblastoma from osteosarcoma. We present the case and treatment of a young female who was discovered to have an epithelioid osteoblastoma of the femur.Case reportWe describe the case of a 19-year-old healthy female who presented with 3 weeks of progressive right-sided groin pain. After biopsy demonstrated, epithelioid osteoblastoma extensive curettage of the lesion followed by insertion of a short cephalomedullary intramedullary nail was performed. At 1-year follow-up,the patient was full weight-bearing without pain or recurrence.ConclusionEpithelioidosteoblastomas are a very rare entity in the diagnosis of benign bone tumors and are characterized as having aggressive features clinically, radiographically, and histologically. It is imperative that an experienced pathologist differentiates this lesion from osteosarcoma to guide treatment and to ensure the best possible outcomes