“Continuity of care throughout the lifespan is important for sarcoma patients,” said Leo Mascarenhas, MD, director of the Adult and Pediatric Sarcoma Program and the Division of Pediatric Hematology/Oncology at Cedars-Sinai Cancer. “Our multidisciplinary expertise, which includes pathology, radiation oncology and surgical care, means both adults and children with sarcoma can receive all of their care in one place.”

Mascarenhas is a professor of Pediatrics and Medicine at Cedars-Sinai Health Sciences University and pediatric hematologist-oncologist who has more than 25 years of clinical and research experience. He has led multi-institutional clinical trials for Ewing sarcoma, rhabdomyosarcoma, osteosarcoma and other rare pediatric solid tumors.

Additional Cedars-Sinai Sarcoma Experts

James Hu, MD, associate director of the Sarcoma Program, has more than 30 years of clinical experience in medical oncology. His research focuses on evaluating novel biomarkers and liquid biopsy methods to improve the treatment of bone and soft tissue sarcomas and examining risk factors for young patients facing rare forms of cancer.

Earl Brien, MD, surgical director of the Sarcoma Bone Tumor Program and professor of Orthopaedics, is an orthopedic oncology specialist. His research focuses on surgical strategies for treating complex soft tissue sarcomas, improving surgical techniques for the removal of bone cancers while avoiding amputations, and use of circulating tumor DNA to noninvasively assess treatment response.

Jason Chan, MD, is a board-certified medical oncologist who specializes in the care of people with sarcoma, including desmoid tumors, gastrointestinal stromal tumors (GIST), as well as other soft tissue and bone sarcomas. He studies how cancers adapt and become resistant to treatment, with a focus on the ability of cancer cells to shift into different cell states that may allow them to grow, spread and survive therapy.

Fahima Dossa, MD, PhD, surgical oncologist in the Jim and Eleanor Randall Department of Surgery, primarily treats soft tissue sarcoma, including gastrointestinal stromal tumors (GIST), liposarcoma, leiomyosarcoma and desmoid tumors. She also specializes in treatment of retroperitoneal sarcoma, which develops deep in the fat or muscle of the abdomen, using a specific operative technique to help prevent recurrence.

Behrooz Hakimian, MD, is an assistant professor of Radiation Oncology whose research merges clinical trial exploration with advanced radiation oncology techniques, focusing on patient safety during therapy for complex sarcomas and soft tissue tumors.

Mitchell Kamrava, MD, is a professor of Radiation Oncology whose sarcoma research centers on optimizing preoperative radiation, reducing treatment timelines and predicting post-surgical complications. He has been a co-investigator on pivotal clinical trials evaluating a condensed five-day preoperative radiation regimen for high-risk primary soft tissue sarcomas.

Eugene Kim, MD, is a professor of Surgery and Pediatrics, director of the Division of Pediatric Surgery and vice chair of the Department of Surgery. He is recognized for his expertise in pediatric surgical oncology and he is a key member of the sarcoma team.

Joseph Schwab, MD, director of Spine Oncology in the Department of Orthopaedics, is a specialist in managing sarcomas of the spine—including rare, complex tumors like chondrosarcomas and chordomas—in adults. His research focus includes use of algorithms and machine learning to build tools that optimize clinical decision-making for bone and soft tissue tumors.

Media Contact

To schedule an interview with a Cedars-Sinai sarcoma expert, contact Christina Elston at christina.elston@cshs.org or 626-298-0702.

Like any typical 10-year-old, Brandon Bateman loved being outdoors and staying active. But when he complained of severe back pain and feeling winded after a short bike ride, his mother knew something was wrong.

“Everything seemed fine before then,” Brandi Bateman said of her son. “Brandon was a very active child. You know, he enjoyed roller coasters, bicycling, gymnastics, jumping off roofs into the pool. You name it, he did it. He loved it all.”

Five years ago, amid the COVID-19 pandemic, a pediatrician suggested genetic testing, which showed Brandon had Marfan syndrome. It’s a genetic disorder that affects connective tissue—the fibers responsible for providing structure and support to organs and tissues in the body. People with Marfan syndrome are often tall and lanky with unusually long limbs, and the condition affects various parts of the body, including the heart, lungs, blood vessels, eyes and skeleton.

February is Marfan Syndrome Awareness Month, highlighting the genetic condition that affects approximately 200,000 people in the United States. The symptoms can vary greatly from person to person. Some patients have mild symptoms, while others, like Brandon, face significant health challenges requiring medical intervention.

Surgery to Breathe Better

Marfan syndrome caused Brandon to develop severe scoliosis—a progressive condition that causes the spine to curve sideways and was the culprit behind his debilitating back pain.

“The scoliosis just got worse,” Bateman said. “It seemed like overnight.”

At the time of his diagnosis, Brandon’s spine was curved at 23 degrees. Four years later, in April 2024, the curve in his spine had nearly tripled to 62 degrees. A typical curvature is about 10 degrees. Brandon’s curvature was so extreme that spinal surgery was recommended.

Initially, Brandon and his family, who live in Tehachapi, California—102 miles from Cedars-Sinai—sought medical care closer to home. But after facing lengthy wait times to see specialists, the Batemans were referred to Kenneth Illingworth, MD, a pediatric spine surgeon at Cedars-Sinai Guerin Children’s.

“In Brandon's case, the scoliosis was so rapidly progressive that he actually started to have stretch marks, which is quite unique,” Illingworth said. “When you have big, big curves, which is not uncommon in kids with Marfan, they start to have long-term health consequences.”

Like most children and teens with Marfan syndrome, scoliosis wasn’t the only pressing issue. In addition to his progressive scoliosis, Brandon had a deep indentation in his chest known as pectus excavatum, a common condition associated with the syndrome that causes the breastbone to sink into the chest. The chest indentation required another surgery. 

“Brandon had a very deep pectus excavatum defect, where his sternum was heading back toward his spine and compressing the area where the heart would be. As a result, the heart was being squished and pushed over,” said Eugene Kim, MD, surgeon-in-chief and associate director of Surgery at Cedars-Sinai Guerin Children’s, director of the Division of Pediatric Surgery and vice chair at the Jim and Eleanor Randall Department of Surgery at Cedars-Sinai.

To fix Brandon’s sunken chest wall, Kim, in collaboration with thoracic surgeon Nguyen Minh Le, MD, performed a minimally invasive procedure that involved creating two small incisions on either side of the chest. A thin, strong titanium bar was scooped underneath the breastbone and muscle, lifting and supporting the sternum and chest wall.

Kim said he placed two bars to spread out the pressure. The bars will stay in place for three years until the chest wall has set in its corrected position.

“My chest doesn't have that indent that it had. It's just straight. And it's like, I feel normal now,” Brandon said.

Kim also performed cryoablation, or freezing of the chest nerves that transmit pain signals to the brain, for pain control after surgery.

“It means kids need far less narcotics for pain after the surgery,” Kim said. “They are out of the hospital in one to two days as opposed to five to seven days.”

Brandon isn’t completely out of the woods. He will always have Marfan syndrome, which means he will need to remain vigilant for other associated complications, especially heart and eye issues related to the condition.

But Brandon and his mother are thrilled with the remarkable results the surgeries yielded and grateful for the multidisciplinary team of specialists who jumped on board to care for him.

“We want doctors who will carry on his care after he turns 18,” Brandon's mother said. “Cedars-Sinai is the best place for that. We have all the specialists he’ll need under one roof.”

Living Life to the Fullest

With successful surgeries and challenging recovery behind him, Brandon is back to being a teenager.

Today, at 15, he is doing the things he loves most—riding his motorbike, jumping on trampolines and living life to the fullest.

“Being able to do those things again feels amazing,” Brandon said. “I don’t feel like I’m limited by my condition anymore. I feel like I can do whatever I want.”

Read more on the Cedars-Sinai Blog: Seeking a Second Opinion for a Spine Condition

Kim will continue as director of the Division of Pediatric General Surgery and as vice chair of the Jim and Eleanor Randall Department of Surgery at Cedars-Sinai Medical Center.

Kim succeeds Andrew Freedman, MD, the inaugural associate director of Surgery at Guerin Children’s. Freedman will continue to serve as chief of Pediatric Urology.

“We congratulate Dr. Kim and recognize that with this appointment, our capacity to perform many different kinds of pediatric surgeries within the Guerin Children’s surgery department will greatly expand,” said Ophir Klein, MD, PhD, executive vice dean of Children’s Health at Cedars-Sinai and executive director of Guerin Children’s. “We wish Dr. Kim much success as he builds on the legacy of Dr. Freedman, whose leadership shepherded the dramatic growth of the Guerin Children’s surgical enterprise. We express our deep gratitude to Dr. Freedman—our program’s success is largely due to his efforts.”

In Kim’s expanded role, he will collaborate with the leadership of all pediatric surgical subspecialties and work with pediatric and surgery division chiefs to support the Guerin Children’s mission.

“It’s a great honor to step into this new leadership position,” Kim said. “I look forward to continuing to grow our children’s surgery program and strengthening Guerin Children’s as a premier destination for pediatric care.”

Kim is a research expert in neuroblastoma, an aggressive childhood cancer that begins in nerve cells. Among his contributions to the field, he and colleagues have identified a neuroblastoma cancer stem cell population resistant to treatment that may be a cause of recurrent and metastatic disease.

“Dr. Kim is an excellent investigator and surgeon, fully committed and eager to take our pediatric surgical program to the next level,” said Cristina Ferrone, MD, chair of the Department of Surgery. “His expertise will help countless pediatric patients and their families as they navigate critical treatment and surgery.”

Prior to joining Cedars-Sinai in 2022, Kim was a professor of Surgery and Pediatrics at the Keck School of Medicine of the University of Southern California. He also was director of Pediatric Surgical Oncology at Children’s Hospital Los Angeles.

Kim is a past president of the Association for Academic Surgery, president of the Society of Asian Academic Surgeons, associate editor of the journal Frontiers in Pediatrics and the chief editor of pediatric surgical content for Drugs & Diseases.

Read more in Cedars-Sinai Discoveries Magazine: Designing a Lullaby-Friendly MRI