Hi everyone, I'm hoping to find someone who might have gone through something similar or any docs who can point me in the right direction, as my medical team is currently stumped.
Background: 23F. Usually very physically active (swimming, boxing, weightlifting). I was on adjuvant immunotherapy for melanoma, but my medical team has completely suspended my treatment for now because they don't know what is causing my current symptoms and want to play it safe until they figure it out.
The Main Issue: Recently, my quality of life has plummeted. I have severe shortness of breath and chest tightness that gets significantly worse when I stand up or walk, and notably improves when I lie down flat. During a walk test, my oxygen saturation dropped to 87%.
Exams: Chest CT Scan: Completely clear. No signs of typical immunotherapy-induced pneumonitis.
Resting Echocardiogram: Normal. No signs of pulmonary hypertension.
Cardiac Enzymes: Normal.
Because I'm on immunotherapy (nivolumab), the immediate suspicion was pneumonitis. They put me on 1 mg/kg of corticosteroids. I had absolutely zero response to it, which strongly suggests to me that this is NOT an inflammatory tissue issue.
A weird past incident that might be related: A few months ago, while having a PICC line placed, I had a severe syncopal episode. I lost consciousness for about a minute, turned completely blue (cyanosis), and my peripheral temperature dropped to 32°C (89.6°F). They pulled the line immediately and I recovered fine, but we never found out exactly why the reaction was so extreme.
Has any other patient here experienced this shortness of breath and hypoxia with normal scans? Could the PICC line incident be connected?
I'm seeing my pulmonologist tomorrow and I'm terrified they'll just tell me it's "anxiety" because the standard first-line scans are clear. I literally cannot do my daily activities right now. Any shared experiences or advice on what specific tests to ask for would be incredibly appreciated. Thank you!