Hollywood actor and Veterans advocate Gary Sinise on Tuesday announced the Death of his son at age 33 following a long battle against a rare form of Cancer.

Sinise posted a link to a message on his foundation’s website about his son McCanna’s Death last month.

ā€œIn honor & Memory of McCanna Anthony ā€˜Mac’ Sinise: 1990-2024,ā€ the post read.

In a lengthy tribute to Mac that was signed by his grieving father, Sinise told the world his son died on Jan. 5 and was laid to rest weeks later on Jan. 23.

He explained that his son’s diagnosis came five years ago while his wife was fighting breast cancer.

ā€œThe summer of 2018 was a particularly challenging time for our family,ā€ the ā€œForrest Gumpā€ actor wrote. ā€œIn June of that year, my wife Moira was diagnosed with stage 3 breast Cancer, and after surgery to remove lymph nodes, she began chemotherapy and radiation.

ā€œThen, on August 8th, we found out that Mac was diagnosed with a very rare Cancer called Chordoma. What was happening? What is Chordoma? I had never heard of this. And two Cancer patients, mother and son, within two months of each other?ā€

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Sinise described the dual Cancer diagnoses of those he loved the most as a ā€œreal punch in the gutā€ for him.

The actor referred to Chordoma as a ā€œone in a million Cancerā€ that strikes only 300 Americans on average per year.

ā€œIn 70% of the cases the initial tumor can be removed, and it is cured,ā€ Sinise wrote. ā€œBut in 30% of the cases, perhaps about 90 people per year, the Cancer returns.ā€

He said his son had fought the cancer for five years before he was hospitalized for the final time in December.

ā€œHe gave his family and friends so much during his 33 years, and he accomplished great things in those final months,ā€ Sinise wrote.

The actor said Mac had spent much of his time in his final months working on inspirational music, which came together in an album titled ā€œResurrection and Revival.ā€ Sinise said the record, which features his group, the Lt. Dan Band, will be released soon, with proceeds going to the Gary Sinise Foundation per Mac’s request.

ā€œThank you, Mac. You did it,ā€ he wrote.

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Sinise said his son ā€œwas a man who loved his Catholic faith, and there is no doubt that his strong faith sustained him through the awful 5 ½ year battle with this crippling Chordoma Cancer.ā€

ā€œWe were blessed to have you in our lives as son, brother, and friend … and we will miss you and love you for eternity,ā€ he wrote.

Sinise signed the statement as the ā€œProud father of Mac Sinise.ā€

Mac Sinise graduated from the University of Southern California Thorton School of Music.

He was a passionate composer, drummer and songwriter, his father wrote.

This article appeared originally on The Western Journal.