Differential Diagnosis for Low WBC in a Young Female with Frequent Infections
Single Most Likely Diagnosis
- Vitamin B12 or Folate Deficiency: This condition can lead to a decrease in white blood cell production, resulting in leukopenia. It's a common and treatable cause of low WBC count, especially in young females with poor dietary habits or increased demand due to pregnancy or lactation.
Other Likely Diagnoses
- Chronic Infections (e.g., Tuberculosis, HIV): Chronic infections can consume the body's immune resources, leading to a decrease in WBC production or an increase in WBC destruction.
- Autoimmune Disorders (e.g., Lupus, Rheumatoid Arthritis): These conditions can lead to the production of antibodies against the body's own cells, including WBCs, resulting in their destruction.
- Medication Side Effects (e.g., Chemotherapy, Antibiotics): Certain medications can suppress bone marrow function, leading to a decrease in WBC production.
- Hypersplenism: An overactive spleen can sequester and destroy WBCs, leading to leukopenia.
Do Not Miss Diagnoses
- Severe Aplastic Anemia: A rare but life-threatening condition where the bone marrow fails to produce blood cells, including WBCs.
- Leukemia or Lymphoma: Although less common, these conditions can present with leukopenia and are critical to diagnose early due to their potential for severe outcomes.
- Congenital Immunodeficiencies (e.g., SCID): Although rare, these conditions can present with recurrent infections and low WBC counts, and early diagnosis is crucial for treatment and management.
Rare Diagnoses
- Cyclic Neutropenia: A rare genetic disorder characterized by periodic episodes of neutropenia, which can increase the risk of infections.
- Shwachman-Diamond Syndrome: A rare genetic disorder that affects the bone marrow, pancreas, and skeleton, and can present with leukopenia and recurrent infections.
- Dyskeratosis Congenita: A rare genetic disorder that affects the bone marrow, leading to aplastic anemia and leukopenia.