In the past decade, extensive research on dielectric properties of biological tissues led to characterization of dielectric property discrepancy between the malignant and healthy tissues. Such discrepancy enabled the development of microwave therapeutic and diagnostic technologies. Traditionally, dielectric property measurements of biological tissues is performed with the well-known contact probe (open-ended coaxial probe) technique. However, the technique suffers from limited accuracy and low loss resolution for permittivity and conductivity measurements, respectively. Therefore, despite the inherent dielectric property discrepancy, a rigorous measurement routine with open-ended coaxial probes is required for accurate differentiation of malignant and healthy tissues. In this paper, we propose to eliminate the need for multiple measurements with open-ended coaxial probe for malignant and healthy tissue differentiation by applying support vector machine (SVM) classification algorithm to the dielectric measurement data. To do so, first, in vivo malignant and healthy rat liver tissue dielectric property measurements are collected with open-ended coaxial probe technique between 500 MHz to 6 GHz. Cole-Cole functions are fitted to the measured dielectric properties and measurement data is verified with the literature. Malign tissue classification is realized by applying SVM to the open-ended coaxial probe measurements where as high as 99.2% accuracy (F1 Score) is obtained.

ABS may support anastomotic healing in septic conditions. Topical ABS application controlling the mucosal bleeding at the cut ends of the colon may also improve the anastomotic wound healing by means of increasing mechanical strength and positively affecting angiogenesis. Further studies shall focus on the clinical importance of those findings.

Adrenal angiosarcoma is an uncommon neoplasm that derives from the vascular endothelium; due to its biological behavior, it should be distinguished from other adrenal tumors. We herein report a case of a 57-year-old woman with diagnosis of an adrenal tumor that was suspected to be malignant. The specimen was histopathologically proved to be an angiosarcoma. The patient was suffering from right upper quadrant pain; after laboratory and radiological workup, a non-functioning right adrenal mass, 14 cm in size, was recognized. A right subcostal incision was made, and adrenalectomy was performed successfully with tumor-free surgical margins. Two months after the operation, a positron emission tomography-computed tomography scan was ordered for follow-up. No tumor tissue or any other metastatic foci remained. The patient had been referred to our medical oncology department and underwent retroperitoneal radiotherapy. However, unfortunately, the patient died due to cardiac insufficiency during the follow-up period.Keywords: Adrenal angiosarcoma, adrenal gland, malignant vascular tumors, adrenal incidentaloma INTRODUCTIONAdrenal angiosarcomas are infrequently encountered neoplasms in daily practice; therefore, they are not well documented in the literature. The etiological factors of this neoplasm are still not clearly understood; however, in a case report, exposure to some carcinogens was believed to be the cause of an adrenal angiosarcoma. There is no evidence supporting the relationship between primary adrenal angiosarcoma and multiple neuroendocrine tumors. Also, administration of radiation therapy in the past or previous abdominal traumas has no correlation with adrenal angiosarcoma (1). In most cases, adrenal angiosarcomas are diagnosed coincidentally following routine workup for patient complaints, which are generally non-specific abdominal discomfort or pain (2, 3). In this report, we present a new case of adrenal gland angiosarcoma of unusual size, which will enrich the collected scientific data on this very rare clinical entity. CASE PRESENTATIONA 57-year-old female patient with right upper abdominal pain was admitted to our hospital. Her past medical history included hypertension and hypercholesterolemia, which were under control. On physical examination, slight tenderness was found in the right upper quadrant, without any rebound or Murphy's sign. Cholecystitis was one of our differential diagnoses; therefore, the patient underwent abdominal ultrasound (US). Multiple gallstones were detected; however, significantly, a 14-cm abdominal lesion was also recognized beneath the liver. Therefore, computed tomography (CT) scans of the abdomen (Figure 1) and chest were ordered. A heterogeneous mass 14×12 cm in diameter, originating from the right adrenal gland, was revealed without contrast dying. There were no additional metastatic disseminations. Blood and urinary analyses documented no hormonal activity of the tumor. Preoperative LDH measurement was 422 U/L, VMA was 1.93 mg/day, normetanephrine was 255.5 µg/24 h, m...

Objective: The management of asymptomatic cholelithiasis is controversial. Silent gallstones are generally assumed to cause complications after at least one episode of biliary colic. The ratio of those silent stones that had initially caused, -or were diagnosed as the etiological agent of- acute pancreatitis has not been reported in the literature yet. Our study was designed to investigate the ratio of asymptomatic cholelithiasis in acute biliary pancreatitis cases. Material and Methods: One hundred and seventy-one patients of 305 cases, who were followed up with the diagnosis of acute biliary pancreatitis, were identified retrospectively. Demographic specifications, laboratory findings and clinical progressions of the patients were inspected. Clinical histories were detailed by phone calls. Gallstones were radiologically detected in 85 out of 171 cases. Those patients were divided as symptomatic and asymptomatic. Clinical findings and follow-ups were evaluated by “Chi-square” test. Results: In the study group, 80% of the patients were asymptomatic (n= 68) and 16.47% of the patients (n= 14) had complicated pancreatitis. Regarding the severity of the clinical course, being symptomatic or not was not identified as a significant factor (p= 0.108). In regard of creating symptoms, the size of the stone was not significant (p= 0.561) and obtained no prediction about the clinical severity of the pancreatitis (p= 0.728). Conclusion: Asymptomatic cholelithiasis patients had a major percentage in acute biliary pancreatitis cases. The “wait and see” approach should be re-evaluated for silent gallstones in prospective trials.