Casey's story posted on CHLA website blog: "Casey Fisher Can't lose."  Consider this a chicken-and-egg discussion no one ever wanted to have, but knowing which came first, the leukemia or the heart failure, is imperative to understanding the course of Casey Fisher’s medical history. “It’s good to get the story right,” says Children’s Hospital Los Angeles oncologist Paul Gaynon, MD, reviewing Casey’s file. Particularly one such as this, an unusual and extensive case that takes thoughtful unraveling, and might have played out differently had the chicken and egg and any components in between been sorted out sooner. The first signs of illness came in 2012, when for several months Casey experienced a barrage of symptoms: rashes, fever, night sweats, shortness of breath, lethargy. Frequent doctor visits didn’t help. His most alarming indicator—an elevated number of white blood cells called eosinophils—was played down. “The pediatrician kept saying, ‘No, he doesn’t have cancer; he has parasites,’” Casey’s mother, Susan Fisher, says. As Casey continued to decline, his father, Alan Fisher, demanded a referral to Children’s Hospital Los Angeles. Within a day, the family was at CHLA, where a bone marrow test found leukemia. Gaynon explains that a high level of eosinophils, or hypereosinophilia, can suggest parasites, but at the volume Casey had them—65 percent of his white blood cell count; the normal rate is under 5 percent—it can indicate a type of cancer, acute lymphoblastic leukemia. “What happens is, the leukemia cells make a cytokine, like a hormone—a chemical that drives the body to make eosinophils,” Gaynon says. Blood tests pick up the eosinophils, but not the leukemia, which can lead anyone who isn’t familiar with their association to attribute the eosinophils to something else, like parasites. “Unless you know,” Gaynon says, “it’s an unusual presentation.” He may see one every five years. The high eosinophil count raised another concern. Hypereosinophilia can cause inflammation throughout the body, according to Casey’s cardiologist, Jondavid Menteer, MD, irritating the lining of the heart and leading to the forming of blood clots. An echocardiogram performed the day after the leukemia was uncovered found blood clots in Casey’s left ventricle. Menteer lays out the progression: “His cancer caused the hypereosinophilia that made his heart sick.” Within 48 hours of arriving at CHLA, after months of non-answers, Casey Fisher had two conclusive diagnoses: leukemia and heart failure. “Our world was crashing around us,” Susan says. ‘All hell broke loose—pardon the pun’ Within a month, chemotherapy erased the cancer, while it was hoped that blood thinners would dissolve the clots. Casey returned home the day after Christmas. A few weeks afterward, he ran out to flag down an ice cream truck, and in his haste tripped in the front yard. He got to his feet, made his purchase, and returned indoors. “That’s when all hell broke loose—pardon the pun,” Alan says. (To the pun in a moment.) Casey collapsed on a couch and began screaming that he couldn’t feel his legs. He was raced to the local hospital in Upland, where a helicopter ride to CHLA would have followed, but the facility’s helipad wasn’t operating, so Children’s Hospital had to send an ambulance. “Nobody really wanted to touch him because no one knew what was going on,” Susan says. At CHLA, an X-ray provided an answer. The force of the fall in the front yard had dislodged the blood clots—hence, Alan’s inadvertent pun. They settled in Casey’s aorta, mid-abdomen, cutting off circulation from his waist down. It took eight days before Casey stabilized, at which point CHLA surgeon James Stein, MD, proposed to go in and expel the clots. “I said, ‘Are you confident you can do this?’” Alan recounts. “He said that usually when he goes into somebody’s aorta, he’s scraping out cancerous cells. So to open up Casey’s aorta and pluck out those clots, it should be a walk in the park.” An inkling of trouble Stein delivered on his assurances, removing the clots, but Casey’s heart function had been weakened. He couldn’t walk from the front door of the family’s house to the sidewalk, or from the CHLA parking garage to the elevators inside. Susan had a bad feeling. “I was thinking, the heart is a muscle, you can’t repair it,” she says. “It wouldn’t squeeze anymore after the clots came out.” She suspected Casey would need a heart transplant. Menteer, medical director of CHLA’s Heart Transplant Program and director of the Heart Failure Program, received the case in October 2014, with Casey back in the ICU, short of breath and suffering pain in his abdomen—a sure sign of heart failure as blood wasn’t reaching the abdominal organs. “I think maybe it was under-recognized just how sick his heart was until that point,” Menteer says. “It became clear he was not going to live a long life if we didn’t replace it.” But getting Casey a heart transplant was a complicated proposition. Heart transplant recipients take medications to muffle their immune systems so the body doesn’t turn on an intruder—the donor heart. But with suppressed immune systems patients are susceptible to infection, along with a recurrence of cancer. Menteer needed to extend Casey’s remission as far out as his heart could last, to lower the risk of the cancer’s return while improving the likelihood of a successful transplant. “We had to figure out how long he had to be cancer-free,” Menteer says, “before we could have some reasonable assurance that our treatment wasn’t going to make his leukemia come back.” Coming to a consensus Menteer says there is no governing guideline that spells out the length of time a cancer patient must be in remission before a heart transplant can be safely performed. That determination belongs to an internal CHLA board, the Transplant Selection Committee. In summer 2015, with Casey again in the hospital, his lungs found to be filling with fluid, Menteer decided to act. He convened the board, consisting of virtually everyone on the transplant team: doctors, nurses, social workers, surgeons, dietitians and therapists. “We all sit in a room and we ask: ‘Is this patient ready to be listed for a heart transplant?’” Menteer says. Gaynon and the oncology group contributed as well. In their view, not enough time had elapsed since Casey entered remission. “They told us that if you knock down his immune system for the transplant,” Menteer says, “there was about a 50 percent risk the cancer would come back.” At no point could it be said the cancer would not return, but Menteer says they would feel “more safe” with more time. “That would be our line in the sand: You’re now an acceptable risk to get a heart transplant.” Casey limped along for another year, until Menteer appealed to the board again, feeling Casey wouldn’t survive many more months without a new heart. He was 3 ½ years into remission and now a year removed from his last round of chemotherapy, and this time the oncologists fell in behind Menteer, clearing the way to list Casey for a transplant. It was then up to Menteer to keep Casey’s heart going until a donor match could be found. He considered installing a mechanical heart pump or a ventricular assist device, but that step was avoided. “His medicines did just enough to make him hold on,” he says. In February 2017, a cardiac catheterization showed Casey’s heart function was substantially worse and causing congestion in his lungs. Failing lungs would remove him from transplant consideration altogether. Menteer called Casey’s parents into a waiting area to update them. “He took us in ‘the room,’” Susan says. “I was like, ‘Oh, no, the room.’ That room. You know something’s not right when you’re going in that room.” With Casey’s heart deteriorating, Menteer was able to get his transplant priority raised from 2 to 1A, the highest level of urgency, jumping him up on the recipient list. Go time... The early morning of April 11 offered Susan auspicious conditions for prayer. “It was a full moon,” she says. “It was the Pink Moon.” Indeed it was, named for the color of early spring. At just before 4 a.m., as she sat at the window in Casey’s room casting good thoughts toward the glowing orb, her cell phone rang. It was the transplant coordinator. “We have a match,” she heard. “We have a match.” The news of a viable donor heart prompted a series of tasks that had to be carried out in a kind of practiced, precise hurry, advancing quickly and busily to the transplant surgery, which would be later that same day. With the donor heart on ice and en route to CHLA, Menteer says there is about a four-hour window in which to get the organ implanted and restarted and to get blood circulating to it for it to function. If it can’t reach the operating room within that time, Menteer says they can’t take it. “The object is for that heart to arrive in this hospital right as we’re getting Casey’s heart out, so we can put the new one in.” At about 2:30 p.m. on April 11, 2017, the Fishers, waiting in the hospital café, heard a helicopter arriving. They knew that amidst the cargo was Casey’s new heart. Color Me Casey.. The procedure took six hours, and the visible effects of the transplant were immediate. Casey’s pallid features had been revived. “His cheeks were pink, his lips were pink,” Susan says. “I could see his freckles. His whole skin color was different.” He had some minor signs of rejection after the surgery, fast heart rhythms that still surface occasionally. Menteer says it’s nothing unusual or serious. He’ll stay on immunosuppressive drugs the rest of his life, so there will always be some question of the leukemia looming. But Gaynon says that having surpassed five years in remission puts Casey nearly beyond the risk of a relapse. “Leukemia’s done,” he says, before drawing back slightly. “How about a theoretical risk? Theoretically there’s a concern the immunosuppression may contribute to the risk of relapse. But I know of no patient with a heart transplant who had a relapse after the heart transplant.” “It’s the least of our worries,” Susan says. When that’s the least of your worries, imagine your worries. Menteer says Casey’s heart is operating optimally. “He looks awesome. There’s nothing materially wrong with him that tells me he can’t have a perfect post-transplant outcome.” Casey does have several aftereffects from the two illnesses, including memory loss due to the chemo and foot drop resulting from the clots that closed off blood flow to his lower body. With therapy, he’s relearned to walk. He’s starting to get reacquainted with life as it’s meant to be lived by a 13-year-old. He goes to skate parks with friends and wants to get back to the dirt-bike riding he began at the age of 3. His parents are planning for his return to school next fall. “We’re definitely, finally, headed in the right direction,” Alan says. “We’re getting on with our lives. You know the part of the Lord’s Prayer where it says ‘Even though I walk through the valley of the shadow of death’? That’s pretty much what we did.” He wrote later to correct himself: “I was actually referring to Psalm 23:4.” Like Gaynon said, it’s good to get the story right. Thank you for supporting me and the more than 300,000 kids worldwide who will be diagnosed with cancer this year! By sharing the gifts of your time, talent and money with the St. Baldrick's Foundation, you're supporting research to give all kids with cancer a better chance for a cure.