80s Rockstar Michael Sweet, 62, Says ‘Changes to My Voice’ Attributed to Thyroid Cancer Diagnosis That He and His Doctors Feel ‘Optimistic’ About

“Unfortunately (and more recently), I’ve been experiencing a few issues vocally, and it feels a little more ‘crowded’ in there. Now I understand why,” said Sweet.

A biopsy performed in November confirmed the nodule was malignant, leading to a diagnosis of papillary thyroid cancer, the most common and typically slow-growing form of the disease.

Thyroid cancer arises when cancer cells form in the tissues of the thyroid gland and grow unchecked. The thyroid is located at the base of the neck and produces hormones that regulate your heart rate, blood pressure, body temperature, and weight. A lump or swelling in the neck is a common symptom of this type of cancer.

“Our thyroid gland is a butterfly-shaped endocrine gland that sits in front of our windpipe. We think of it as kind of our energy driver. Its main purpose is to produce thyroid hormone,” Stephanie Giparas, a physician assistant at the Endocrine and Head and Neck Department at Moffitt Cancer Center, tells SurvivorNet.

“The thyroid hormone not only regulates our metabolism, but almost every organ system in our body uses thyroid hormone. It supports our heart, it supports our brain. So you cannot live without thyroid hormone.”

WATCH: Understanding Thyroid Cancer Types & Treatment Options

Despite the shock of hearing the word “cancer,” Sweet says his medical team is optimistic.

“It’s slow growing and something that my doctor seems very optimistic about,” he shared in a Facebook update.

He added that while the diagnosis is unsettling, he believes the cancer will soon be behind him and that he expects to be fully ready for 2026.

“Even though it’s concerning to even hear the ‘C’ word (much less be diagnosed with it), I believe that it will be behind me soon enough. I’ll get in and deal with it and heal up and be ready for 2026,” Sweet said.

Sweet says he will spend December finalizing his treatment plan, which includes surgery.

“We start recording the new Stryper album on 12/28, and that will remain on schedule. Once we finish tracking, I’ll be undergoing another surgery to remove my right thyroid and the nodule itself,” Sweet said.

WATCH: What to Expect From Surgery: Thyroid Cancer

“Historically, most thyroid cancers were treated with complete thyroid removal, so total thyroidectomy and then follow-up care with radioactive iodine,” Dr. Kristen Otto, head and neck surgeon at Moffitt Cancer Center in Tampa, Florida, tells SurvivorNet.

“We now understand and have moved much more on the opposite end of the spectrum, away from these more aggressive procedures to trying to do more limited procedures like partial thyroidectomy.”

The band plans to remain on schedule despite the unexpected hiccup that Sweet’s cancer diagnosis has brought forth. Continuing to perform is a commitment, Sweet says he intends to keep.

As news of his diagnosis spread, fans flooded Sweet’s social media page with messages of support—many sharing their own thyroid cancer experiences and offering prayers for healing.

Facebook user Greg Perry said, “I’ve had three thyroid cancer surgeries since 1997. First was a complete thyroidectomy; the second and third were for parathyroid removal. And I had two rounds of radioactive iodine treatment after the first two surgeries. Since 2016, I’ve been free of this issue. I more than understand what you are going through and wish and pray for a great outcome for you.”

“Praying for you. I’ve been battling thyroid cancer for two surgeries, and now there is a nodule in a Lymph node, so it’s not done. God is great, and you got this, my friend,” Facebook user Chris Hoffman said.

Sweet, a man of deep faith, said the outpouring of prayer brings him comfort. “I’ve always felt some kind of peace in being able to ask for prayer here… it is a true blessing,” he wrote.

Using Faith as a Tool for Healing

A study published in Cancer highlights the powerful role of faith in the lives of cancer patients, revealing that 69% of those diagnosed with cancer reported praying for their health, compared to 45% of the general U.S. population.

Cancer psychologist Dr. Andrew Kneier helped co-author “Coping with Cancer: Ten Steps toward Emotional Well-Being.” He also co-authored a column published by Stanford Medicine with Rabbi Jeffery M. Silberman, director of spiritual care at Danbury Hospital in Connecticut.

Together, they emphasize the deep emotional and psychological support that faith provides to those battling illness.

According to Kneier and Silberman, spirituality offers a powerful coping mechanism, helping individuals navigate the uncertainty that comes with a cancer diagnosis.

“A person’s faith or spirituality provides a means for coping with illness and reaching a deeper kind of inner healing,” they explain.

Faith helps patients in multiple ways, including:

• Seeking answers to the difficult questions illness presents.
• Finding comfort in the midst of fear and pain.
• Gaining a sense of direction during an overwhelming and uncertain time.

Religious teachings, they argue, can serve as a guidepost, offering strength and resilience when navigating the emotional and physical challenges of cancer.

WATCH: Three-time cancer survivor shares how her faith helped her during cancer.

New York City Presbyterian Pastor Tom Evans tells SurvivorNet about the importance of finding ways to cope with the complex web of feelings you may be experiencing after a challenging health diagnosis, such as cancer.

“It’s important to reach out in a simple prayer to God, even if you’ve never prayed before, you don’t know what to say, a heartfelt plea, ‘God, help me, be with me,’” Pastor Evans told SurvivorNet.

“You can reach out to God, and you can reach out to people, your friends and family, and say, ‘I can’t do this on my own. I need you.’ “It’s in that willingness to be open and to receive that we can find something deeper that we never would’ve encountered without this hardship,” Evans continued.

Understanding Thyroid Cancer and How It Is Treated

Thyroid cancer is generally grouped based on the specific cells it develops from.

• The most common type is differentiated thyroid cancer, such as papillary thyroid cancer. Under the microscope, these cancer cells still look somewhat like normal thyroid tissue. They typically start in follicular cells, the part of the thyroid responsible for making hormones.
• Non-differentiated cancers can come from the thyroid’s calcium-controlling cells, the immune cells that fight infections within the thyroid, or from follicular cells that are so mutated that they no longer look like thyroid cells under a microscope.

“Although papillary thyroid cancer is the most common, the other types of cancers tend to be more aggressive and tend to spread more widely, at least in advanced cases,” Dr. Lisa Orloff, a head and neck surgeon at Stanford Medicine, explained to SurvivorNet.

Differentiated Thyroid Cancers

“Differentiated” thyroid cancers are those in which the cancer cells still resemble normal thyroid tissue under a microscope. These cancers usually begin in the follicular cells—the cells responsible for producing thyroid hormones.

• Papillary Thyroid Cancer (PTC):
  • The most common form of thyroid cancer accounts for the majority of cases. It typically grows slowly and is considered highly treatable. PTC often develops in one lobe of the thyroid, and even when it spreads to nearby lymph nodes, treatment outcomes are generally very positive.
• Follicular Thyroid Cancer:
  • The second most common type. It can sometimes spread through the bloodstream to areas such as the lungs or bones, but it also tends to grow slowly and often responds well to treatment. When found early, long‑term outcomes are usually excellent.
• Oncocytic (Hürthle Cell) Thyroid Cancer:
  • A less common subtype that was once grouped with follicular cancers. It can be more challenging to treat, but early detection is associated with more favorable outcomes.

WATCH: Diagnosing Thyroid Cancer.

When being diagnosed, patients may receive the following tests:

Thyroid-stimulating hormone (TSH) Test. This blood test mainly checks levels of a hormone called TSH (thyroid-stimulating hormone), which is made by a small gland in the brain (the pituitary) to regulate thyroid function.
While the test can’t tell if a thyroid issue is cancerous, it helps doctors see if a thyroid nodule is producing hormones. In many cases, hormone-producing nodules are not cancerous.

• Ultrasound. An ultrasound can detect subtle thyroid changes, ranging from small nodules to extensive changes. However, not all nodules detected are necessarily harmful.
• Biopsy. The biopsy may follow an ultrasound, which detected a nodule. In this procedure, a radiologist visualizes the nodule on a screen and directs the needle precisely into the targeted area to collect a tissue sample for further testing for signs of cancer.
• Depending on the size of the tumor and if it has spread into nearby lymph nodes or tissues, doctors determine the stage or how advanced the thyroid cancer is.

Preparing for Surgery

Thyroid cancer patients may be faced with surgery to help treat the cancer. There are varying surgery options, including a total thyroidectomy, which involves completely removing the thyroid. In other cases, a partial thyroidectomy may be necessary, which means only a portion of the thyroid gland is removed.

A partial thyroidectomy may be optimal if the nodule is confined to one side or has smaller growths affecting a smaller portion of the thyroid.

“The benefits to partial thyroidectomy over total thyroidectomy are that many patients maintain normal thyroid function and don’t have to be on lifelong thyroid hormone medication after a partial thyroidectomy, whereas with a total thyroidectomy, you need the lifelong medication,” Dr. Otto explains.

“Additionally, it’s a shorter surgery and less invasive, so we do prefer partial thyroidectomy. There are some patients who are well suited to that, and then there are others who are not, and we can go over those details.”

Dr. Otto explains that tumors that are small and on one side of the gland are well-suited for a partial thyroidectomy.

WATCH: Understanding what goes into thyroid cancer surgery.

After the surgery, soreness at the incision site and in the throat (due to the breathing tube) is common but typically mild. Over-the-counter medications or prescribed pain relievers help manage discomfort. In some cases, a small tube may be placed in your neck to drain fluid. This is usually removed in a day or two.

Many patients leave the hospital the same day, especially if it’s a lobectomy.

“After partial thyroidectomy, most patients can go home from the hospital the same day. They actually don’t have to stay overnight. The distinction with a total thyroidectomy is that we watch patients overnight, and the main reason is actually that we have to monitor calcium levels after total thyroidectomy,” Dr. Otto explains.

Patients can usually resume light activities the next day, but avoid strenuous exercise or heavy lifting for about two weeks to let their incision heal.

For thyroid cancer patients whose cancer is at an advanced stage, in addition to possible surgery, treatment may also involve chemotherapy, thyroid-stimulating hormone therapy (stimulates hormone production), and/or radiation therapy. In some cases, when thyroid cancer is very aggressive, surgery may no longer be effective, so relying on other treatment methods may be more optimal.

Thyroid cancer has reasonable treatment success rates. However, there is a chance of recurrence, meaning the cancer can return after treatment (also called recurrence). Recurrence may happen a few months after remission or sometimes even decades later. Patients should ask their doctor after treatment what their risk of recurrence is.

Some advanced patients also have an aggressive type of disease, such as anaplastic thyroid cancer. Patients should know that there are still powerful treatment options in these settings that can yield an optimal quality of life and control disease progression.

WATCH: The Role of Targeted Therapy in Advanced Thyroid Cancer

“When patients present with more aggressive disease or high-risk disease, our focus is really on identifying how we can best treat these patients and decrease their risk for recurrence without causing unnecessarily aggressive harm from the treatments that we’re offering,” Dr. Mara Roth, an endocrinologist and associate professor at the University of Washington in the Fred Hutch Cancer Center, tells SurvivorNet.

Turning to Radiotherapy

In many cases, thyroid cancer can be treated with surgery and a treatment approach known as radioactive iodine (RAI) therapy. However, in some advanced cases of thyroid cancer, standard radiation therapy.

When people hear the word “radiation” in relation to thyroid cancer, they often think of radioactive iodine (RAI)—a treatment that works well for certain thyroid cancers that still act like normal thyroid cells. But RAI is very different from external beam radiation.

• Radioactive Iodine (RAI): Taken as a pill or liquid, it travels through the bloodstream and targets any remaining thyroid tissue.
• External Beam Radiation: Uses high-energy beams from a machine outside the body to precisely target tumors.

For advanced or more aggressive thyroid cancers, external beam radiation may be used to ease symptoms, slow tumor growth, or help control a specific problem area. It’s often most effective when used in very targeted situations or alongside other treatments.

Dr. Jessica Geiger, a medical oncologist at  Cleveland Clinic, describes this approach as “spot welding.” If a patient has one particularly troublesome tumor—such as a painful lesion in a weight-bearing bone—radiation can be directed at that single area to “zap” the problem spot while the rest of the disease remains under surveillance or systemic treatment.

WATCH: Thyroid cancer surveillance.

If a doctor finds your recurrence at an early stage, your chance of quickly regaining remission is often higher. This is why regular follow-ups, blood tests, and neck ultrasounds are essential.

Some of the more common signs and symptoms of a return include:

• A lingering cough that doesn’t go away
• A lump or swelling in the neck that you can feel or see
• Difficulty swallowing (dysphagia)
• Neck pain that isn’t explained by muscle strain or other causes
• Hoarseness or voice changes

Questions For Your Doctor

If you or someone you love has been diagnosed with thyroid cancer, you may have questions regarding treatments and what your next steps should be, so you can prepare. Here are some questions to help you begin your conversation with your care team.

• What type of thyroid cancer do I have, and how does that affect my treatment options?
• What are the recommended treatments for my specific cancer subtype, and what are the potential side effects?
• Will I need surgery, radioactive iodine, or external beam radiation—and how do these treatments differ?
• How will treatment affect my thyroid function long‑term, and will I need to take hormone replacement medication?
• What lifestyle changes or precautions should I take during and after treatment to support recovery and reduce recurrence risk?

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