[Perineural cysts].

Perineural cyst (Tarlov cyst) is a lesion in a form of fluid-filled sacks, usually located within the nerve root sheath at the posterior root of a spinal nerve, whose wall is formed by: endoneurium, peripheral nerve fibers and ganglion cells and areolar tissue. Depending on the studied population, the frequency of lesion occurence was estimated at 1.5- 13.

Acute hepatitis A virus infection in patients hospitalised at the Department of Infectious Diseases, Medical University of Lublin (Eastern Poland) in the years 2009-2015.

The aim of our study was to analyse all medical records from the years 2009-2015 for adult patients with acute hepatitis A virus (HAV) infection who were hospitalised at the Department of Infectious Diseases, Medical University of Lublin (Eastern Poland). During this 7-year study, there were only 5 hospitalised patients with confirmed HAV infection. In the study group 4 out of 5 patients had travelled to HAV-endemic areas (Egypt, Ukraine), and 3 of the hepatitis A cases were imported from Egypt.