Red Blood Cell Abnormality

Red blood cell disorders affect millions of people worldwide, disrupting how oxygen reaches every part of the body and potentially causing serious health complications that require lifelong management.

Table of contents

• What are red blood cell abnormalities?
• Types of red blood cell disorders
• Common symptoms
• What causes these disorders?
• How are they diagnosed?
• Treatment options
• Long-term outlook

What are red blood cell abnormalities?

Red blood cell abnormalities are conditions that affect red blood cells, which are the cells in your blood responsible for carrying oxygen from your lungs to all parts of your body^[1]. Also known as erythrocytes, these cells are concave, disc-shaped cells that move through blood vessels throughout the body^[2].

RBC disorders, erythrocyte disorders, blood disorders

Red blood cells contain a protein called hemoglobin, which binds to oxygen and gives blood its distinctive red color^[2]. The human body produces roughly 2 million red blood cells every second, and they typically live for about 120 days before being destroyed and recycled by the liver and spleen^[2].

When red blood cells don’t work properly or when there aren’t enough of them, your body struggles to deliver oxygen to tissues and organs. This can lead to various health issues ranging from mild fatigue to life-threatening complications^[1].

Types of red blood cell disorders

There are many different types of red blood cell disorders. Healthcare professionals often categorize them by what part of the cell or its function is affected^[2].

Hemoglobinopathies are disorders that involve abnormal production or changes in the structure of hemoglobin, the oxygen-carrying protein in red blood cells. Examples include sickle cell disease and thalassemia^[2].

Red cell membrane disorders, also called cytoskeletal abnormalities or membranopathies, change the structure or permeability of the red blood cell or its outer covering. Examples include hereditary spherocytosis and elliptocytosis^[2].

Red cell enzyme deficiencies, also called enzymopathies, are genetic conditions that affect the production of enzymes needed for proper cell function and metabolism. Examples include glucose-6-phosphate dehydrogenase deficiency (G6PD) and pyruvate kinase deficiency^[1][2].

Anemia occurs when a person has a low number of healthy red blood cells or low levels of hemoglobin^[6]. There are many different types of anemia with various causes, including iron deficiency anemia, folate deficiency, hemolytic anemia, and sideroblastic anemia^[1].

Polycythemia is the opposite problem—having too many red blood cells. This makes blood thicker than normal and can increase the risk of blood clots^[1][8].

Common symptoms

Symptoms of red blood cell disorders can vary depending on the specific type, severity, and how the abnormality affects the cells. However, because all these disorders impact how red blood cells function, some symptoms overlap^[2].

The most common general symptoms include:

• Fatigue and lack of energy
• Weakness
• Pale lips, skin, and hands
• Shortness of breath
• Dizziness or feeling faint when standing up quickly
• Rapid heartbeat or heart palpitations
• Headaches
• Trouble focusing or concentrating
• Irritability
• Decreased exercise tolerance

^[1][2]

Some disorders cause additional specific symptoms. For example, hemolysis, which is increased red blood cell breakdown, can cause jaundice (yellowing of the skin and eyes), an enlarged spleen, and gallstones^[1].

In children, red blood cell disorders may cause slower growth and development compared to other children their age^[1].

What causes these disorders?

Red blood cell disorders can be either inherited or acquired during a person’s lifetime^[4].

Inherited disorders are passed down from parents to children through genes. Most red blood cell disorders are caused by abnormalities or mutations in the blood that a person is born with^[1]. Examples include sickle cell disease, thalassemia, hereditary spherocytosis, and certain enzyme deficiencies.

Acquired disorders develop because of something that happens during a person’s lifetime. Many things can cause acquired red blood cell problems, including:

• Nutritional deficiencies, particularly low iron, folate, or vitamin B12 in the diet
• Blood loss from injury or illness
• Certain medications
• Chronic diseases that cause inflammation
• Autoimmune conditions where the immune system attacks red blood cells
• Bone marrow problems that affect red blood cell production

^[1][6]

Some medical conditions can also be factors in developing red blood cell abnormalities. These include kidney disease, liver disease, cancer, inflammatory bowel disease, thyroid disease, and autoimmune diseases^[1].

How are they diagnosed?

Red blood cell disorders may be suspected based on symptoms, a complete medical history, and a physical examination^[1]. However, blood tests are essential to confirm the diagnosis.

The most common test is a complete blood count (CBC), which measures the number and types of cells in the blood, including red blood cells. This test also measures hematocrit (the percentage of blood made up of red blood cells) and hemoglobin levels^[6].

Additional tests may include:

• Tests to examine the size, shape, and color of red blood cells
• Blood smear examination under a microscope
• Tests for specific proteins or enzymes in red blood cells
• Genetic tests to identify inherited conditions
• Bone marrow biopsy in some cases

^[1][6]

After all tests are completed, doctors will be able to identify the specific type of red blood cell disorder and outline the best treatment options^[1].

Treatment options

Treatment for red blood cell disorders depends heavily on the specific type of disorder a person has^[1].

For nutritional deficiencies, treatment often involves taking supplements and changing the diet. This may include iron supplements for iron deficiency anemia, folate supplements, or vitamin B12 supplements or injections^[1][6].

Other treatment approaches may include:

• Blood transfusions to increase the number of healthy red blood cells
• Medications to reduce red blood cell breakdown or stimulate red blood cell production
• Hydroxyurea therapy for sickle cell disease to reduce pain episodes
• Medications to modify the immune system response, such as corticosteroids or intravenous immunoglobulin
• Surgical removal of the spleen (splenectomy) in certain cases

^[1]

Many children and adults with these diseases can be successfully treated. Treatment focuses on managing symptoms and treating any underlying conditions^[1][4].

Long-term outlook

The long-term outlook for people with red blood cell disorders depends on the specific type of disorder^[1].

Some blood disorders may not cause symptoms or require treatment. Others are chronic (lifelong) illnesses that require ongoing treatment but typically don’t affect how long a person will live. With treatment, most blood disorders become chronic illnesses that people can manage successfully^[4].

Many children with red blood cell disorders can be successfully treated and go on to live fulfilling lives^[1]. However, certain disorders can increase the risk for damage to other organ systems. For example, polycythemia can cause neurological problems, and hemochromatosis (iron overload) can cause liver damage^[1].

Some red blood cell disorders are serious illnesses that can be life-threatening without proper treatment^[4]. Regular medical care and monitoring are important for managing these conditions effectively.