[Perineural cysts]. / Torbiele okolokorzeniowe.

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- 13.2%, with its significant majority occuring in women. Cyst development may be the result of ischemia, hemorrhage, inflammation or trauma. Cysts are usually asymptomatic theefore they are likely to bo detected accidentally. However, in approximately 1/4 of the cases, the cyst puts so much pressure on the nerve and the neighbouring nerve roots that it becomes symptomatic (causes pain). The presence of clinical symptoms may be an indication for conservative treatment (i.e. analgesics, rehablitation, cyst puncture) or surgery (usually laminectomy).

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. Our data indicate that during the past 7-year period most HAV patients hospitalised at the Department of Infectious Diseases in Lublin were due to travel.