Can Mild Hereditary Elliptocytosis Worsen Over Time?

If you have been diagnosed with mild hereditary elliptocytosis (HE), it is completely natural to wonder—and perhaps worry—if your condition will suddenly worsen as you get older. The short answer is no: the baseline severity of your HE is determined by your genetics, which are set at birth and do not change over time ^[1][2]. If your HE is mild now, the underlying disease itself will remain mild.

However, even though your genetic mutation does not get worse, certain life events, illnesses, or physical changes can temporarily increase the destruction of your red blood cells or halt their production. When this happens, your symptoms or anemia can become more severe for a period of time. Over decades, chronic mild breakdown of red blood cells can also lead to complications like gallstones that might feel like the disease is worsening as you age.

Why Your Baseline Stays the Same

Hereditary elliptocytosis is caused by a genetic mutation that affects the scaffolding of your red blood cells, causing them to be oval or elliptical rather than round ^[3]. Because this is a structural issue programmed by your DNA, the “blueprint” for your red blood cells does not degrade as you age ^[2]. People with severe forms of HE usually have completely different genetic inheritance patterns (such as inheriting mutations from both parents) and are typically diagnosed in early infancy ^[4][5]. If you have mild HE, you have a mild form of the mutation, and aging alone will not turn it into a severe form ^[1].

Triggers and Complications As You Age

While the baseline condition remains stable, there are physiological stressors and long-term effects of the disease that can cause your anemia or symptoms to flare up:

1. Viral Infections and High Fevers (Aplastic Crisis)
High fevers and significant infections can temporarily increase the rate at which your elliptical red blood cells break down. The most critical risk is a specific viral infection called Parvovirus B19 (which causes “Fifth Disease” in children, and often causes joint pain or a mild rash in adults). In someone with a red blood cell disorder, this virus can temporarily shut down the bone marrow’s ability to make new red blood cells ^[6]. This sudden halt in production can lead to a rapid, life-threatening drop in your red blood count known as an aplastic crisis ^[7][8]. You do not need to panic with every common cold, but you should watch closely for signs of severe anemia (extreme fatigue, paleness, shortness of breath, dizziness) during or after any significant viral illness.

2. An Enlarging Spleen (Splenomegaly)
The spleen acts as your body’s blood filter, removing old or damaged red blood cells. Because your red blood cells are misshapen, your spleen has to work harder to filter them out. Over years or decades, this extra work can cause the spleen to become enlarged, a condition called splenomegaly ^[9][10]. As it grows larger, the spleen can become overactive and trap red blood cells faster than your body can replace them ^[11][12]. If this happens, your doctor might recommend surgically removing the spleen (a splenectomy) to stop the rapid destruction of your red cells ^[13][14]. While this often resolves the severe anemia, living without a spleen means you will need specific vaccines and must be very careful about certain bacterial infections for the rest of your life.

3. Gallstones (Cholelithiasis)
When your body breaks down misshapen red blood cells, it produces a yellow substance called bilirubin. Over many years of chronic mild breakdown (hemolysis), this excess bilirubin can build up in the gallbladder and form pigment gallstones ^[12]. While not a worsening of the HE mutation itself, suddenly developing severe pain in your upper right abdomen from a gallstone can easily feel like a worsening of your health as you age.

4. Pregnancy
Pregnancy places an immense demand on the body’s blood supply. The body’s blood volume naturally expands (which dilutes red blood cells) and requires significantly more iron and folic acid. For women with mild HE, this extra metabolic stress can temporarily worsen anemia ^[15]. If you become pregnant, your care team will monitor your blood counts closely.

What You Can Do

Because mild HE can occasionally flare up under stress, it is important to be proactive:

• Inform your care team: Proactively tell all new doctors, urgent care staff, emergency room providers, obstetricians, and surgeons about your HE diagnosis.
• Know the signs of severe anemia: Seek medical attention immediately if you experience extreme fatigue, pale skin, shortness of breath, a racing heart rate, or dizziness—especially during or after a viral illness.
• Monitor your spleen and gallbladder: Ask your doctor to check the size of your spleen during annual physical exams. Notify them if you feel a sensation of fullness or pain in your upper left abdomen (spleen) or sharp pain in your upper right abdomen (gallbladder).
• Stay nourished: Ask your doctor if you should take a folic acid supplement, which helps your bone marrow keep up with the demand of replacing red blood cells.