Two Sisters Who Lost Their Mother to Cancer Found Out 11 Years Later They Would Have to Fight for Their Lives Too – Their Story
Their mother had already been buried. Two sisters were forced to confront the same disease and the genetic mutation that had been waiting all along after receiving two catastrophic diagnoses eleven years later.
The effects of losing a parent to cancer go much beyond sadness. It was the start of a lengthy, unexpected trip that would reappear more than ten years later with much more catastrophic repercussions for one family. A silent childhood loss turned into a genetic legacy that changed people’s lives.
Two sisters were faced with a rare and aggressive diagnosis of their own eleven years after the death of their mother from breast cancer.
They were thrown into life-altering procedures, intense treatment, and an unclear medical future within months of one another.
The Death of a Mother and the Beginning of a Lifelong Struggle
Cassandra and Katelyn Harding, Devorah Sorger’s daughters, were still in elementary school when she passed away from breast cancer in 2012.
Following her death, Christopher Harding, their father, took on the role of sole caregiver, raising the two children by himself.
The family stayed together. They dealt with the loss as a part of their history for years until it started to recur much more quickly more than ten years later.
Cassandra, also known as Cassie to her loved ones, received a diagnosis of osteosarcoma, a form of bone cancer, in July 2022.
Although the tumor was initially discovered in her knee, it had already spread to her femur and tibia by the time it was diagnosed. Her medical team acted swiftly to limit the sickness because her case demanded immediate treatment.
The damaged bones were surgically removed from Cassandra. Prosthetic metal parts were used to replace her tibia, femur, and knee.
Following that, she started a 40-week chemotherapy course, which she finished in May 2023. She has since kept up her therapy and routine checkups with doctors to keep an eye out for any recurrence symptoms.
18-year-old Katelyn, also known as Katie, was diagnosed with osteosarcoma in June 2023, less than a month after Cassandra finished chemotherapy.
Katelyn’s cancer, in contrast to her sister’s, was found in the lower spine, pelvis, and tailbone. Her health became more complicated due to the placement and size of the tumor, necessitating a longer course of treatment and several significant surgical procedures.
In August 2023, Katelyn started her own 40-week chemotherapy regimen. That year, on October 31, her team planned a very sophisticated procedure.
Her pelvic tumor and sacrum were completely removed during the 40-hour procedure. Several nerves were severed during the extraction of both fibulas for reconstructive purposes.
To support the area, metal rods were placed along her spine. The procedure has life-altering repercussions.
After spending about two months in the hospital at Montreal General Hospital, Katelyn spent an additional three months at a rehabilitation facility to start acclimating to the functional and physical changes.
Questions concerning the illness itself and how it had affected the family twice in such a short period of time were unavoidable as both sisters completed their treatment.
What They Were Fighting: Osteosarcoma
The rare but dangerous disease known as osteosarcoma begins in the cells that make new bone. Although there are only roughly 1,000 new occurrences of this type of bone cancer in the US each year,
it is the most prevalent. Children, teens, and young adults are most commonly affected, while men are somewhat more likely to experience it.
Usually, the cancer starts in the ends of long bones, like the femur, tibia, or upper arm bone, particularly those near the knee. But it can appear in any bone in the body, including as the skull, shoulder, spine, or pelvis.
Osteosarcoma formed in high-risk regions in both Cassandra’s and Katelyn’s cases: Cassandra’s was in the knee, femur, and tibia, while Katelyn’s was in the pelvis, sacrum, and spine.
When osteoblasts—normal bone cells—go through aberrant modifications that lead to their unchecked growth, osteosarcoma develops.
Cancerous bone tissue, which is weaker than healthy bone, is formed by these cells. The tumor may spread to nearby tissues, such as tendons and muscles, as it grows.
Metastasis is the term for the process by which cancer can occasionally travel via the bloodstream to other areas of the body. The most frequent location for metastatic dissemination is the lungs.
It’s unclear exactly what causes osteosarcoma. It is thought to be brought on by mutations, or alterations, in the DNA of the bone cells.
These mutations may be inherited genetically or acquired over time. Later on, this distinction would be crucial in the case of the Harding family.
Although osteosarcoma can cause a variety of symptoms, the most prevalent one is chronic pain in the afflicted bone or joint, which usually gets worse with time.
Additional symptoms could be a significant lump at the location, stiffness, or edema. In certain situations, a bone may shatter for no apparent reason, and pain frequently worsens with lifting or physical activity. There may also be decreased range of motion or limping in a leg.
Diagnosis can occasionally be delayed since many of these symptoms are similar to those of more prevalent illnesses, like joint issues or sports injuries. Both sisters’ cancers had advanced considerably by the time they were diagnosed.
The TP53 Mutation: An Uncommon Genetic Connection
The Harding family was directed to a genetics department for additional testing because of the exceptional circumstances surrounding the diagnosis of osteosarcoma in both sisters within months of one another.
Multiple genetic screens were performed to find any underlying mutation that could explain the pattern after doctors suspected a possible hereditary origin.
The findings verified that Katelyn and Cassandra both had a rare TP53 gene mutation. This gene is essential for controlling cell division and averting cancer.
When in good working order, TP53 aids in the suppression of aberrant cell division. However, this function is compromised by mutations in this gene, which greatly raises the risk of getting different types of cancer.
Li-Fraumeni syndrome is a hereditary cancer disease linked to the TP53 mutation. People who have this mutation are more likely to get cancer, frequently at a young age, in the breast, brain, bones, and other organs.
Just over ten years after their mother, Devorah Sorger, passed away from breast cancer, the sisters both acquired the same unusual malignancy, which the discovery helped to explain.
The significance of the mutation goes beyond the first diagnosis because it is inherited. For the remainder of their lives, both sisters would need to have cancer scans every three months in order to identify any new tumors before they have a chance to grow or spread.
Additionally, preventive operations were being contemplated. Given their increased risk of breast cancer, both girls were eventually anticipated to have double mastectomies.
Apart from the psychological and health consequences, the genetic discoveries have other long-term effects. Because the TP53 mutation is inherited and potentially transmissible, neither sister would be able to conceive biological offspring.
Their long-term plans for the future as well as their health prognosis were altered by the diagnosis. Clarity was brought about by the mutation’s discovery, but it also made it clear that the family’s fight against cancer was far from over.
The Harding Family’s Experience with Life After Diagnosis
The Harding family experienced long-term financial, emotional, and physical burden as a result of the diagnoses of both daughters. When Cassandra started her therapy in 2022, her father, Christopher, had already taken time off work to care for Katelyn. Following Katelyn’s diagnosis in the middle of 2023, his leave of absence was prolonged indefinitely.
The family was constantly under strain to manage consecutive rounds of treatment and rehabilitation. The family had to start planning for adjustments to everyday life at home in addition to the expenses of the medical care, especially in light of Katelyn’s post-operative requirements.
Due to her treatments, she was left with lifelong physical limitations, such as the need for leg braces and a colostomy and urostomy bag. The family had to procure specialist equipment and make home adjustments to facilitate her movement and recuperation.
In order to alleviate the financial strain, a fundraising page was established. However, despite an expanding support system, the family’s problems persisted because they were founded in a reality that had undergone significant change in less than two years.
Bidding Farewell: Katelyn’s Demise
The Harding family revealed heartbreaking news on July 24, 2025. After battling osteosarcoma for two years, Katelyn passed away at the age of twenty. The sisters’ shared Instagram page featured a memorial message announcing her passing.
“Katie Bug has left us peacefully surrounded by her closest of family,” the family wrote in the post, expressing their profound sorrow.
She “touched countless hearts and brought a smile with everyone she met,” according to their description. Noting that she was “not alone,” the message also mentioned that she had joined her mother, Devorah.
The Harding family suffered yet another terrible tragedy with Katelyn’s passing. Her absence creates an unfillable void after suffering the protracted months of therapy, surgery, and recovery.
In their letter to all who had helped them, the family expressed their sincere gratitude.
