Bouncing of Leidenfrost steel balls on water surface.

A steel ball with a density higher than that of water can bounce on a water surface when heated to a temperature well above the Leidenfrost point. In this letter, an experiment is conducted where heated steel balls are released onto a water surface. The heated steel ball descends into the liquid, thus causing the liquid to evaporate and form a vapor cushion with an upward force that lifts the steel ball.

Malignant mesothelioma of the tunica vaginalis testis: a malignancy associated with recurrent epididymitis?

A 53-year-old Taiwanese male had several episodes of left epididymitis with hydrocele refractory to antibiotic treatment. Partial epididymectomy plus preventive vasectomy were planned, and, incidentally, an ill-defined nodule was found lying on the tunica vaginalis near the epididymal head. The pathological diagnosis was malignant mesothelioma of the tunica vaginalis testis.

Pericecal hernia of the inferior ileocecal recess: CT findings.

Internal abdominal herniations are rare. A 34-year-old healthy man was seen in the emergency room because of severe lower abdominal pain and episodic vomiting. Pericecal internal herniation of the inferior ileocecal recess was suspected by abdominal CT study and confirmed by exploratory laparotomy.