Michaela Riley has issued a stark warning after a cough she dismissed as long Covid led to a rare stage 3 cancer diagnosis.
Riley, 34, a teacher from Lewisham, south London, contracted coronavirus in February 2021 and assumed her persistent symptoms were simply lingering effects of the virus. When the cough refused to clear after nearly three weeks, her mother urged her to seek urgent medical attention.
“I’d had Covid, but there was this lingering cough that wasn’t going,” Riley explained. “Every time I laid on my back I felt like I was drowning. Like my lung was filling up with water.”
Doctors subjected her to an exhaustive battery of tests including an X-ray, ECG, CT scan, MRI, biopsy, and PET scan. The investigations revealed a 6.4cm mass in her chest. She was diagnosed with stage three thymoma, an uncommon cancer of the thymus gland that affects roughly 400 to 600 people annually in the US.
The emotional weight of the diagnosis crystallized during one devastating moment at home. Riley had just returned from a PET scan and had been warned to avoid close contact with children due to radiation exposure.
“It really hit me when I got home after numerous investigative appointments at the hospital,” she recalled. “I’d just had a PET scan, they suggest that you’re not to be around children for a while after.”
“My son had just come from school. He came through the door excitedly and ran towards me. My mum screamed out, ‘No! You can’t hug mummy yet’. For the first time I realised there may be a point where my son would never hug me again.”
Riley was referred to Guy’s Hospital in London, where she had received treatment for meningitis as an 11-year-old child. Before beginning aggressive therapy, clinicians at Guy’s Assisted Conception Unit offered her fertility preservation.
She then faced 21 rounds of chemotherapy designed to shrink the tumour prior to surgery.
“Chemo is very tough. You walk in there ready to go and you are absolutely fine, but once treatment starts to take affect you can barely walk out,” she said. “My rounds were eight hours long, so I was often the first in and the last out. I was a baby by the end of it.”
“My dad would always come upstairs, pick me up and carry me to the car. You go from being fiercely independent to needing your parents, or whoever is there, to care for you. I needed someone to parent me and parent my child. Mentally that was a struggle.”
In September 2021, consultant thoracic surgeon Professor Andrea Bille led a specialist team through a delicate five-hour operation to remove the mass and part of Riley’s thyroid gland. The procedure carried extreme risk because the tumour sat near vital organs and had invaded the superior vena cava, the major vessel returning deoxygenated blood to the heart. Surgeons successfully extracted the tumour, reconstructed the vein, and repaired a portion of the pericardium, the protective sac around the heart.
“On average a thoracic surgeon may encounter a case like this once a year or even less,” Professor Bille noted. “Despite being quite rare, here at Guy’s, we do probably one a month, because we set up this service. Michaela has made a full recovery and now she’s five years cancer free.”
Now five years in remission, Riley undergoes annual monitoring and has since given birth to a daughter, now almost two, without requiring fertility intervention.
Marking the 10-year anniversary of the Cancer Centre at Guy’s Hospital, Riley expressed profound gratitude toward her medical team: “From beginning to end there was no stone unturned… Having cancer and surviving it has given me the chance to start again.”
Riley’s case underscores how pandemic-era assumptions about Covid symptoms can delay detection of serious underlying conditions, particularly when respiratory complaints overlap with common virus after-effects.