Dave Coulier shared an upbeat update on her ongoing battle with cancer, giving a thumbs up while undergoing chemotherapy treatment.

“Putting a positive spin and sending love to all of you who are struggling and going through chemotherapy,” the Full house the actor, 65, wrote in a photo he shared with his Instagram Stories on November 15.

“And don’t forget to laugh ,” the comic captioned the bottom of the photo, which shows an IV line coming out of the neckline of his shirt.

Like the Cleveland Clinic explains, a chemotherapy port is often placed in the upper chest and allows for blood draws and medication administration – without having to prick the skin each time.

Coulier’s message came just two days after the actor tells PEOPLE exclusively that he had been diagnosed with stage 3 non-Hodgkin’s lymphoma – and had started chemotherapy just two weeks after his diagnosis in October.

After having a respiratory infection, Coulier told PEOPLE his lymph nodes were swollen, prompting his doctor to send him for tests.

“Three days later my doctors called me back and they said, ‘We wish we had better news for you, but you have non-Hodgkin’s lymphoma and it’s called B and it’s very aggressive.'” he told PEOPLE.

“I went from having a little cold to having cancer, and it was pretty overwhelming,” he said. “It’s been a very quick roller coaster ride.”

In non-Hodgkin’s lymphoma, white blood cells grow abnormally, causing tumors to grow throughout the body, according to the Mayo Clinic. Chest pain or fever can also be symptoms, as well as swollen lymph nodes, which Coulier suffered from. B-cell lymphoma – the specific Coulier type – is “rare”, the Mayo Clinic said.

Coulier told PEOPLE that he previously shaved his head as a “pre-emptive strike” because chemotherapy is well-known for causing hair loss.

Coulier says he and his wife Melissa Bring chose to face her diagnosis “head on” – recruiting advice from friends in the medical field.

“We all put our heads together and said, ‘Okay, where are we going?’ And they had a very specific plan for how they were going to deal with this,” he told PEOPLE.

He shared that last week his bone marrow test came back negative, meaning “at this point my chances of recovery have gone from something like low to 90 percent.” And so it was a great day.

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