Rare, alarmingly deforming yet non-cancerous tumor

Slamet                                             (c) dailymail.co.uk

 The man in the picture, known only as Slamet is 59 and lives in Indonesia.  His condition is a neurofibromatosis, a genetic condition which causes uncontrollable growths along the nerves.
There are a lot of things we look unto medical sciences for solution and this is certainly one of them.

Slamet                                                    (c) dailymail.co.uk

According to Daily Mail, "although many people who have the condition inherit it from one of their parents, up to 50 per cent develop it randomly from a gene mutation before they are born."
Despite the alarming appearance, the growths and swellings are not cancerous or contagious.
A wikipedia explanation for this rare condition notes that it

"is an autosomal dominant disorder, which means only one copy of the affected gene is needed for the disorder to develop. Therefore, if only one parent has neurofibromatosis, his or her children have a 50% chance of developing the condition as well.

Read more about Slamet's condition in Daily Mail and Mirror.