Beyond the Bleed: Clinical Spectrum, Emergency Management, and Outcomes of Persons with Haemophilia C (Factor XI Deficiency) Presenting to a Tertiary Care Emergency Department in India - A Ten- Year Retrospective Case Series
This ten-year retrospective case series from a tertiary care hospital in India reveals that Haemophilia C (Factor XI deficiency) presents less frequently as acute bleeding and more often as a coagulopathy complicating planned interventions, with all 17 emergency encounters successfully managed using fresh frozen plasma and tranexamic acid without mortality.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
Imagine your body is a bustling construction site, constantly repairing itself whenever a pipe bursts or a wall cracks. To keep the site safe, you have a specialized crew of "glue-gang" workers called clotting factors. Their job is to rush to the scene of a leak, mix up a sticky patch, and seal the hole before things get messy. Most people know about two famous crew members, Factor VIII and Factor IX; if they are missing, the site gets flooded easily, and this is the classic "Haemophilia" that usually affects boys. But there is a third, quieter crew member named Factor XI. This worker is a bit different: they don't follow the usual "boys-only" rulebook, so they can be missing in both boys and girls. The tricky part is that this crew member is a bit of a mystery. Sometimes, even if they are missing, the construction site looks perfectly fine until a very specific type of leak happens—usually in places that are naturally wet and slippery, like the mouth, nose, or private parts. Because this worker is so hard to spot and doesn't always cause a disaster, many people walk around without ever knowing they are missing a key piece of the puzzle.
This is where the story gets interesting for the emergency room. Usually, when doctors think of Haemophilia, they imagine a patient rushing in with a bleeding knee or a swollen joint. But what happens when the "glue-gang" is missing a different worker, and the patient walks in for something totally unrelated, like a headache or a scheduled surgery? A team of researchers in India decided to play detective. They looked back over ten years at their hospital's emergency records to see what happened when people with this specific "Factor XI" deficiency showed up. They weren't just looking for bleeding; they wanted to see the whole picture. What they found was a surprise: for these patients, the biggest emergency wasn't always a sudden flood of blood. Often, the real crisis was a "pause button." The doctors had to stop and say, "Wait, we can't do this surgery or this baby delivery yet because we don't have the right glue to fix the potential leaks." It turned out that in the emergency room, this condition was less about stopping a bleeding wound and more about figuring out how to safely plan the next step without causing a disaster.
The Detective Story: What They Found
The researchers, working at a big teaching hospital in Manipal, India, dug through ten years of records (from 2014 to 2024) to find the "Factor XI" crew. Out of 153 people with any kind of Haemophilia, they found just eight with this specific type. After cleaning up the data, they focused on five patients (four women and one man) who had visited the emergency room a total of 17 times.
Here is the twist: Most of these visits had nothing to do with active bleeding.
Only 4 out of the 17 visits were for actual bleeding. And even then, the bleeding wasn't the scary, life-threatening kind that fills the room with red. It was all "mucosal" bleeding—meaning it happened in wet, slippery places like the mouth, tongue, nose, or vagina. None of these patients needed to go to the intensive care unit, and nobody died. When they did have active bleeding, the doctors used a standard "patch kit" available in India: Fresh Frozen Plasma (a liquid blood product given at doses of 10 to 15 mL per kilogram of body weight) and a medicine called tranexamic acid to help the glue stick. It worked, and the patients went home.
But the real story was in the other 13 visits. These were the "non-haemorrhagic" encounters. In five of these cases, the patient wasn't bleeding at all, but the missing Factor XI became the main problem. It acted like a speed bump on the road to their treatment.
- Two women came in for planned deliveries. Because of the missing factor, the doctors had to pause and get special advice before they could proceed. In one case, the delivery was delayed until a hematologist (a blood expert) gave the green light. In another, the doctors gave a preventative dose of the plasma patch kit before the baby was born.
- One woman came in for two separate neurosurgical admissions to remove a pituitary tumor. The surgery was put on hold both times until the blood experts could figure out a safe plan.
- One woman came in for a planned hysterectomy (removal of the uterus). Again, the surgery couldn't happen until the blood team cleared it.
In these cases, the "emergency" wasn't a bleeding wound; it was the risk of bleeding if they proceeded too fast. The missing Factor XI forced the medical team to stop, think, and plan carefully. The other eight non-bleeding visits were just regular illnesses (like a sore throat or a skin rash) where the missing factor didn't matter at all.
The Takeaway
The big lesson from this ten-year look-back is that Haemophilia C (Factor XI deficiency) is a bit of a chameleon. In the emergency room, it doesn't always show up as a dramatic, bleeding crisis. Often, it shows up as a "wait and see" situation where a planned procedure—like having a baby or having surgery—has to be paused because the body's glue crew is incomplete.
The authors suggest that doctors need to keep their eyes open for this. It's not just about treating a bleed; it's about recognizing that this condition can turn a routine appointment into a complex puzzle that needs a blood expert's help before anything happens. Since India doesn't have the special, concentrated "glue" (Factor XI concentrate) that some other countries use, they rely on the plasma patch kit, which seems to work well for the bleeding they saw. However, the study is small (only five patients), so these findings are more like a helpful hint or a "hypothesis" than a final rule. It suggests that we should look for this condition not just when someone is bleeding, but whenever a person with a known deficiency needs a procedure that could go wrong. The authors hope that in the future, more hospitals will look at their data to see if this "pause button" pattern is a common story for everyone with this condition.
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