This individual is suffering from acute elephantiasis.  The most common cause of this disfiguring disorder is an infection with a filiarial nematode, likely Wuchereria bancrofti.  Onchocerca volvulis could also be the culprit as well as Brugia malayi.  In the life cycle of W. bancrofti, the human host is infected through the bite of at least 77 different species of mosquitoes of the genera, Anopheles, Mansonia, Culex, and Aedes.  The fly delivers filariform larvae to the definitive host with its bite, which then travel through smaller lymphatic channels, eventually settling in larger lymphatic channels near lymph nodes in the lower part of the body, particularly the groin.  There, the worms mature and periodically release microfilaria to the bloodstream.  Should a subsequent uninfected mosquito suck blood, it may ingest microfilaria, continuing the life cycle in the mosquito.  Repeated infections resulting in  acute inflammations may lead to a  build up of fibrous connective tissue, perhaps compounded by calcified, dead worms.  The lymph channels become distended as a result of the back-up of lymph flow and tissues "upstream" from the block become edematous, leading to the swelling seen here.  The areas most affected include the scrotum and legs, although arms and breasts and vulva are also affected.  I would like to cite this brief video but am unable to, since a former student sent it to me without citation.