Leukemia vs. Leukemia: Understanding the Correct Spelling and Cancer

"Leukemia" is the correct spelling. "Lukemia" is a common misspelling.

What Is Leukemia?

Leukemia is a group of malignant disorders of the blood-forming tissues (bone marrow, lymphatic system) characterized by uncontrolled proliferation of abnormal white blood cells. These cells crowd out normal hematopoiesis, leading to anemia, infection risk, and bleeding.

Major Classifications

Key Facts

• Most common cancer in children (ALL), but 90% of cases occur in adults.
• Diagnosis: CBC with differential, peripheral smear, bone marrow aspirate/biopsy, flow cytometry, cytogenetics (karyotype, FISH), molecular testing (PCR, NGS).
• Treatment: Chemotherapy, targeted therapy (TKIs for CML, FLT3/IDH inhibitors for AML), immunotherapy (CAR-T for ALL), stem cell transplant.
• Survival has improved dramatically: 5-year OS ~90% for pediatric ALL, ~70% for AML, ~85% for CLL, ~70% for CML (TKI era).

If you or a loved one has symptoms (fatigue, bruising, infections, weight loss, lymphadenopathy), see a doctor for a CBC. Early diagnosis saves lives.

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Type	Cell of Origin	Typical Age	Course
Acute Lymphoblastic Leukemia (ALL)	Lymphoid precursor	Children (peak 2-5 yr)	Rapid, aggressive
Acute Myeloid Leukemia (AML)	Myeloid precursor	Adults (median 68 yr)	Rapid, aggressive
Chronic Lymphocytic Leukemia (CLL)	Mature B-lymphocyte	Older adults (median 70 yr)	Indolent; may not need immediate treatment
Chronic Myeloid Leukemia (CML)	Myeloid stem cell (BCR-ABL1)	Adults (median 64 yr)	Chronic → accelerated → blast crisis