The recent surge in CSL shares has investors on the edge of their seats, eagerly awaiting the company's FY26 results. With a 12% climb this month, the ASX healthcare stock is showing signs of life after a brutal sell-off. But the question remains: is this just a temporary blip, or is a turnaround truly underway? Personally, I think the upcoming earnings report could be the turning point that investors have been hoping for. However, I also believe that the finer details will be far more crucial than the headline profit number. What makes this particularly fascinating is the potential impact of CSL Behring, the company's key growth engine, which has faced significant challenges. US immunoglobulin demand remains strong, but reduced channel inventory and lower albumin prices in China could knock around US$500 million from revenue. This raises a deeper question: can CSL Behring's sales momentum and margins recover despite these headwinds? In my opinion, the answer lies in the company's ability to navigate these challenges and demonstrate improvement. One thing that immediately stands out is the potential for CSL to regain market share and the early signs of recovery in the albumin market. However, I believe that the real test will be in the company's ability to stabilize earnings, improve margins, and guide for FY27. If CSL can prove that the worst is over, it could be a game-changer for investors. But if the results reveal that the turnaround remains a work in progress, shareholders may need to endure more pain. What many people don't realize is that the company's leadership uncertainty and the demerger of its Seqirus influenza vaccine business could also impact the results. From my perspective, the upcoming earnings report is a make-or-break moment for CSL. It could either prove that the company is on the path to recovery or remind investors that the turnaround is still a long way off. The broker community has identified some reasons for optimism, but I believe that the real test will be in the company's ability to demonstrate tangible progress. In conclusion, the FY26 results could be the moment that CSL proves the worst is over, or it could be a reminder that the turnaround remains a work in progress. Either way, investors will be watching closely, and the impact on the stock could be significant.