RT Journal Article SR Electronic T1 Nematode infection mimicking paratesticular malignancy JF BMJ Case Reports FD BMJ Publishing Group Ltd SP bcr2013200775 DO 10.1136/bcr-2013-200775 VO 2013 A1 Jins Kallampallil A1 Sarah J Wood A1 Timothy O'Dempsey A1 Ross J Craigie YR 2013 UL http://casereports.bmj.com/content/2013/bcr-2013-200775.abstract AB Paratesticular swellings pose a diagnostic dilemma due to concerns over malignancy. We present a case of paratesticular swelling in a 13-year-old boy as a result of Dirofilaria immitis infection. The boy presented with a 2-month history of right testicular discomfort associated with an irregular mass within the scrotum.