hi, I’m just looking to see if anyone has any advice or similar stories, my dad had penile melanoma, which unfortunately spread through his blood to his lung, he’s having immunotherapy, he had a scan before he started treatment and the cancer had grown 1/2 a cm,,he’s had 6 sessions of treatment and a recent scan but we won’t get results until treatment next week, this last week he’s had awful pain in his back,do you reckon the cancer could of spread that quick? I’m hoping and praying that it’s more of a muscular problem and it hasn’t spread, thank you for reading