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Background/Aim: Hepatic xanthogranuloma is a very rale disease and formation process is unknown. Case Report: A 69-year-old woman previously diagnosed as simple liver cyst. Two years before, a 36-mm liver cyst was found in segment 5, while one year later, the hemorrhagic cyst was 40 mm in diameter and a thin septum had formed. The most recent T1-weighted magnetic resonance imaging (MRI) showed a regular 21-mm hepatic mass with a hyperintense 11-mm center and a hypointense periphery. Peripheral enhancement was seen on gadolinium enhanced MRI. Hepatobiliary cystadenoma or cystadenocarcinoma was suspected because of wall thickness and slight enhancement. Microscopic examination following laparoscopic partial liver resection revealed fibroblasts, dense collagen fibers, and a double layer of hemosiderinladen as well as foamy macrophages attached to the fibrous capsule. Conclusion: The patient was diagnosed with a hepatic xanthogranuloma that originated from a hemorrhagic liver cyst. Intracystic hemorrhage may be one of the reasons for hepatic xanthogranuloma formation. [ABSTRACT FROM AUTHOR]

We developed an elastomer-based Fabry–Perot interferometer with a submicron gap between a freestanding thin film and a substrate by a dry transfer technique. A newly developed elastomeric nanosheet using a polystyrene–polybutadiene–polystyrene triblock copolymer (SBS) provides a low Young’s modulus of 40 MPa, a large elastic strain of 38%, and high adhesiveness. A freestanding SBS nanosheet can be formed by a dry transfer technique without vacuum and high-temperature processes owing to the high adhesiveness of SBS nanosheets. With the pressure change, the freestanding nanosheet was found to deform with good adhesion between the dry transferred SBS and the substrate. [ABSTRACT FROM AUTHOR]

In this study, we fabricated a stretchable freestanding ultrathin sheet based on a polystyrene–polybutadiene–polystyrene (SBS) copolymer with entropy-driven elasticity and evaluated its optomechanical properties. The freestanding SBS sheet had a thickness of 675 nm and a size of 10.4 × 10.4 mm2 on a through hole of a poly(dimethylsiloxane) (PDMS) sheet. The measurement of the reflection spectra of the optical interference peaks of the stretched sheets revealed that the SBS nanosheet had a Poisson’s ratio of 0.5–0.68 for a 38% elastic strain, which is one order of magnitude greater than that of parylene. [ABSTRACT FROM AUTHOR]