Blink-182 star Mark Hoppus is "almost done" with his cancer treatment, the band's former guitarist Tom DeLonge has revealed.
Hoppus, 49, previously said he had been diagnosed with stage 4 diffuse large B-cell lymphoma.
DeLonge, who was one of the group's founding members and known for his recognisable pop-punk voice, wrote on Instagram: "@markhoppus is almost done with his treatment… send him (love) to power him through this last stretch."
The caption was alongside a photo of the pair looking more youthful than they do now.
Using an Instagram story, Hoppus also shared the moment he told his doctor about a lump on his shoulder, where he asks when he can get it checked.
The bass player wrote: "Hi Jill. For the past couple days I've had this dull sore lump in my shoulder kind of right where it connects to my neck that could either be fatal lymphoma or a sore muscle.
"At what point should I be concerned and have it looked at?"
His physician replied: "I need to see you!!!"
The screenshot also shows the pair scheduling the appointment for later that day.
He captioned the message with "how it started", while the next image is of him in the hospital, seemingly wired up and flashing fans the V-sign, captioned "how it's going".
Hoppus has shared a number of images chronicling his treatment, notably of him without hair.
He formed US pop punk band Blink-182 in 1992 with former bandmates Tom DeLonge and Scott Raynor. The latter was replaced by Travis Barker.
Guitarist Tom DeLonge left in 2015, and was replaced by Matt Skiba.
The group is best known for hits such as All The Small Things, Always and I Miss You.