This issue of "Progress in Medicine”, published to celebrate the 50th anniversary of Rev. Jerzy Popiełuszko Bielański Hospital in Warsaw, includes original papers, case reports and reviews. The case reports and series of cases – the third ever published case of carcinoma cuniculatum of the larynx (Bardadin J et al.), a case of ureteral stone illustrating the modern technical methods available for treating the complicated urolithiasis (Kryst P, Trykozko U), the outcomes of 12 cases of Meckel's diverticulum treated by surgery (Gradek J, Michalak J), the 3 cases of giving birth to healthy newborns by three women treated with haemodialysis for chronic renal failure (Gellert R et al.), the 3 cases of long-lasting uncomplicated femoral access for heamodialysis using new S-shaped tunneled catheter (Gellert R et al.), and the 8 cases of Tako-Tsubo syndrome (Jarząbek K et al.), all clearly show the diversity of problems in patients seen by doctors at Bielański Hospital.