Hemodynamics and wall shear metrics in a pulmonary autograft: Comparing a fluid-structure interaction and computational fluid dynamics approach.

Objective: In young patients, aortic valve disease is often treated by placement of a pulmonary autograft (PA) which adapts to its new environment through growth and remodeling. To better understand the hemodynamic forces acting on the highly distensible PA in the acute phase after surgery, we developed a fluid-structure interaction (FSI) framework and comprehensively compared hemodynamics and wall shear-stress (WSS) metrics with a computational fluid dynamic (CFD) simulation.

Methods: The FSI framework couples a prestressed non-linear hyperelastic arterial tissue model with a fluid model using the in-house coupling code CoCoNuT.

Hepatocellular carcinoma presenting as an isolated sphenoid sinus lesion: a case report.

We report a rare case of a metastatic sphenoid sinus lesion originating from an undiagnosed hepatocellular carcinoma (HCC) in a 53-year-old man who presented with gradually progressive external ophthalmoplegia. Imaging showed a right sphenoid sinus lesion infiltrating the parasellar region. Although a primary sphenoid biopsy was inconclusive, positive hepatitis B surface antigen and CT-guided fine-needle aspiration cytology suggested an HCC.

Tracheal resection with end-to-end anastomosis for post-intubation cervical tracheal stenosis: study of 14 cases.

Background And Objectives: The incidence of acquired laryngeal stenosis is increasing. This retrospective study aimed to assess the long term results of circumferential resection with end-to-end tracheal anastomosis for isolated post-intubation stenosis of the cervical trachea, and to review the relevant literature.

Methods: Twelve male and two female patients (aged 16-30 years, mean age 24 years) treated between February 2003 and December 2008 were included.

Rhinosporidiosis of the parotid duct cyst: cytomorphological diagnosis of an unusual extranasal presentation.

This cytology report highlights a case of rhinosporidiosis of the parotid duct cyst not associated with nasal manifestations. In an endemic area, one should be familiar with its morphologic features in fine-needle aspiration cytology even on scanty material, for it could be one of the investigations in the initial workup of a case.