Akebono (Japan)

Background and Clinical Significance: Hepatic sarcoidosis is a benign lesion of unknown etiology. The gold standard for diagnosing hepatic sarcoidosis is histopathological examination. The symptoms and imaging findings of patients with hepatic sarcoidosis are often atypical, leading to misdiagnosis as hepatocellular carcinoma (HCC). Ultrasound resolution microscopy (URM) can overcome the diffraction limit, enabling fine visualization and quantitative analysis of the microvascular networks. This study aimed to provide new evidence for the differential diagnosis of these two diseases by comparing the URM parameters of hepatic sarcoidosis initially misdiagnosed as HCC with those of HCC. Case Presentation: A 67-year-old woman was admitted to the hospital due to upper abdominal pain for two weeks. Ultrasonography revealed a liver mass. The lesion was located in segment IV of the left hepatic lobe, was approximately 18 × 10 mm in size, and appeared hypoechoic. Contrast-enhanced ultrasound and enhanced magnetic resonance imaging both showed a “fast-in, fast-out” pattern, strongly suggesting HCC. The tumor markers were within the normal range. The patient underwent a laparoscopic left hepatic lobectomy. The histopathological diagnosis of the resected specimen was “hepatic sarcoidosis”. URM examination was performed during the preoperative diagnostic process. Subsequently, the URM parameters of the patient’s lesion were analyzed and compared with those of HCC. The results showed differences in multiple URM parameters, including microvascular flow velocity, diameter, microvascular density ratio, and vascular distribution, between this case of hepatic sarcoidosis and HCC. Conclusions: URM can quantitatively and multidimensionally evaluate the microvasculature of liver lesions, providing new reference data for the diagnosis and differential diagnosis of hepatic sarcoidosis.

El presente es un trabajo de indagación narrativa que busca estudiar y reflexionar sobre una experiencia educativa y su aporte para la formación ciudadana. La experiencia trata sobre el acompañamiento del docente en la construcción de un espacio de participación estudiantil, denominado Centro de Alumnos/as, en una escuela primara en Chile. Indaga en los sentidos educativos que se despliegan en la experiencia mediante la metodología narrativa. Como resultados se proponen las metáforas “tomar de la mano” y “ponerse a escuchar”, así como la relevancia del juego, como elementos claves en el acto pedagógico. A modo de conclusión se sostiene la importancia de indagar en el saber docente para construir sentidos y reflexionar en comunidad de enseñantes.

We introduce (co)homology theory for multiple group racks and construct cocycle invariants of compact oriented surfaces in the 3-sphere using their 2-cocycles, where a multiple group rack is a rack consisting of a disjoint union of groups. We provide a method to find new rack cocycles and multiple group rack cocycles from existing rack cocycles and quandle cocycles. Evaluating cocycle invariants, we determine several symmetry types, caused by chirality and invertibility, of compact oriented surfaces in the 3-sphere.

We revised the previous records of Clorida japonica Manning, 1978 and conducted extensive field and museum material surveys in Japan. The material examined included five species of the genus Clorida Eydoux & Souleyet, 1842 as follows: C. japonica; C. albolitura Ahyong & Naiyanetr, 2000; C. denticauda (Chhapgar & Sane, 1967); C. rotundicauda (Miers, 1880); and C. seversi Moosa, 1973. Among them, C. albolitura, C. denticauda, C. rotundicauda, and C. seversi are new to the Japanese stomatopod fauna. Re-examination of the Japanese specimens previously reported as C. japonica has shown that they partially belong to Cloridina ichneumon (Fabricius, 1798), a new record from Japan as well. A key to the Japanese species of Clorida and Cloridina reported in this study is also provided.