Blood Cancers
Blood cancers, also known as hematological malignancies, are cancers that affect the blood, bone marrow, lymphatic system, and immune system. Unlike solid tumors, blood cancers interfere with normal blood cell production and function, leading to infections, anemia, bleeding, and organ involvement. Advances in chemotherapy, targeted therapy, immunotherapy, and stem cell transplantation have significantly improved survival and quality of life.
Overview
Blood cancers arise when abnormal blood-forming cells grow uncontrollably and crowd out healthy cells.
They commonly originate in the bone marrow, lymph nodes, or circulating blood.
Major categories include leukemia, lymphoma, and multiple myeloma.
Some blood cancers are slow-growing, while others are aggressive and require urgent treatment.
Management requires specialized hematology-oncology care, advanced diagnostics, and long-term follow-up.
Risk Factors
Non Modifiable
Increasing age
Male sex for some blood cancers
Genetic conditions such as Down syndrome
Family history of blood cancers
Modifiable
Exposure to benzene and industrial chemicals
Previous chemotherapy or radiation therapy
Chronic immune suppression
Infections
Epstein–Barr Virus (EBV)
Human T-cell Lymphotropic Virus (HTLV-1)
Human Immunodeficiency Virus (HIV)
Chronic Hepatitis C infection
Prevention Tips
Avoid unnecessary exposure to chemicals and radiation
Use protective equipment in high-risk workplaces
Maintain good immune health
Seek early evaluation for persistent symptoms
Symptoms
Early
Persistent fatigue
Mild fever
General weakness
Loss of appetite
Common
Unexplained weight loss
Night sweats
Frequent or severe infections
Easy bruising or bleeding
Pale skin due to anemia
Advanced
Swollen lymph nodes
Bone pain or fractures
Abdominal fullness from enlarged liver or spleen
Severe infections
Neurological symptoms in advanced disease
Organ Specific
Blood Related
Shortness of breath due to anemia
Frequent infections due to low white blood cells
Bleeding gums or nosebleeds due to low platelets
Diagnosis
Approach
Clinical Evaluation
Detailed medical history and physical examination
Assessment for lymph node enlargement and organomegaly
Tests
Complete blood count with peripheral smear
Kidney and liver function tests
Imaging
Ultrasound or CT scan for organ involvement
PET-CT for lymphoma staging
MRI in selected cases
Biopsy
Bone marrow aspiration and biopsy
Lymph node biopsy for lymphoma
Molecular Tests
Flow cytometry immunophenotyping
Cytogenetic and molecular analysis
Mutation testing such as BCR-ABL, FLT3, NPM1
Staging
Disease-specific staging systems
Risk stratification based on genetic features and response to therapy
Treatment
Principle
Surgery
Surgery is rarely used except for diagnostic biopsy or splenectomy in selected cases
Radiation Therapy
Used in selected lymphomas or for symptom relief
Systemic Therapy
Chemotherapy as the backbone of treatment
Targeted therapy such as tyrosine kinase inhibitors
Immunotherapy including monoclonal antibodies and CAR-T cell therapy
Maintenance therapy in selected cancers
Supportive Care
Blood and platelet transfusions
Infection prevention and treatment
Growth factor support
Bone-strengthening medications
Psychological and nutritional support
Do's and Don'ts
Dos
Seek medical care for persistent fatigue, infections, or bleeding
Follow treatment and monitoring schedules strictly
Maintain good hygiene to reduce infection risk
Stay physically active as tolerated
Discuss fertility preservation when relevant
Donts
Do not ignore persistent symptoms
Do not delay treatment for aggressive blood cancers
Avoid unverified alternative treatments
Do not stop medicines without medical advice