FEM simulation of breast deformation with semi-fluid representation.

Purpose: In image-guided surgery for breast cancer, the representation of the breast deformation between planning and surgery plays a key role. The breast deforms significantly and behaves as a fluid with some constraints. Concretely, the deep fat layer in the breast deforms fluidly due to its incomplete fixation to the chest wall, while the anchoring structures by fascia avoid excessive deformation.

Pre-Procedural Virtual Reality Guiding Catheter Simulation Navigating Successful Percutaneous Coronary Intervention of a Chronic Total Occlusion of an Anomalous Origin of the Right Coronary Artery.

We report two cases of successful percutaneous coronary intervention (PCI) of a chronic total occlusion (CTO) lesion with an anomalous origin of the right coronary artery (AORCA) and challenging guiding catheter engagement using a new 3D virtual reality (VR) guiding catheter simulation system. Appropriate guiding catheter selection is critical for a successful complex PCI. A more suitable guiding catheter size, shape, and position with a robust backup force often leads to the successful completion of more accessible and safer procedures.

A Case of Spontaneously Developed Retroperitoneal Parasitic Leiomyoma.

Spontaneous retroperitoneal parasitic leiomyomas are extremely rare and are mostly located in the pelvic cavity. Herein, we present a case of a small primary parasitic leiomyoma arising in the retroperitoneum. A 46-year-old Japanese woman presented with iron deficiency anemia.

SMARCB1-deficient malignant neoplasm of the pancreas with heterogeneous morphologies that cannot be classified into existing histologic types.

A 50-year-old male with a pancreatic tail tumor underwent distal pancreatectomy. At 14 and 27 months after the primary surgery, metachronous liver metastases were identified and partial hepatectomies were performed for each. Pathologic findings of the primary pancreatic tumor were heterogeneous, but they essentially categorized into two components based on their cytologic features: (i) clear cell component and (ii) epithelioid cell component.