Survivorship: Cancer Risk and Long-Term Monitoring

Living with Diamond-Blackfan Anemia (DBA) is a lifelong journey that extends far beyond managing blood counts. Because DBA is a cancer-predisposition syndrome, “survivorship” means staying ahead of potential complications through consistent, systematic monitoring ^[1][2].

While these risks are serious, being informed allows you to work with your care team to catch issues at their earliest, most treatable stages.

Understanding Cancer Risk

Researchers have found that the genetic changes that disrupt ribosome production also increase the risk of certain cancers ^[1].

• The Big Picture: One registry analysis estimated the overall relative risk of cancer in people with DBA to be about 4.8 times higher than in the general population ^[1].
• Cumulative Risk: By age 45, the same registry estimated that approximately 13.7% of individuals with DBA will have been diagnosed with some form of cancer ^[1]. (Note: These are population-level cohort estimates; individual risk varies based on genotype, treatment, and age).
• The Post-Transplant Reality: It is a common misconception that a Stem Cell Transplant (HSCT) removes all cancer risk. While it cures the blood disorder, the rest of the body’s cells still carry the DBA genetic variant. Solid tumor risk remains, and lifelong screening is still required ^[3][4].

High-Priority Screening Areas

The 2024 international consensus emphasizes systematic surveillance for three main categories of cancer ^[2]:

1. Colorectal Cancer (CRC)

Unlike the general population, where screening often begins at age 45 or 50, CRC in DBA can occur in young adults ^[5].

• The Strategy: The 2024 guidelines recommend early and systematic colorectal cancer screening ^[2]. Because evidence is evolving, the consensus does not provide a single universal starting age for all patients. You must work with a DBA-experienced clinician to determine the exact starting age (often in early adulthood) and frequency (e.g., via colonoscopy) based on your specific genetic mutation and family history.

2. Osteogenic Sarcoma (Bone Cancer)

This cancer is most commonly reported in children and adolescents with DBA ^[5].

• What to Watch For: There is no routine imaging scan established for osteosarcoma in asymptomatic individuals. Instead, parents and patients must be vigilant for red flags that require a symptom-based urgent doctor’s visit:
  • Persistent, focal bone pain (pain in one specific spot that doesn’t go away).
  • New swelling or a lump on a bone.
  • An unexplained limp or a sudden decrease in the use of a limb.
  • A fracture that happens with very little or no clear injury ^[6].

3. MDS and AML (Blood Cancers)

Children who do not undergo HSCT are at a higher risk for Myelodysplastic Syndrome (MDS) and Acute Myeloid Leukemia (AML) ^[7]. While HSCT substantially reduces this risk, it does not guarantee absolute prevention. These are usually monitored through regular Complete Blood Counts (CBCs). A bone marrow examination is typically triggered by abnormal blood counts or new symptoms, guided by local practice.

Endocrine and Organ Health

The disease and the treatments used for DBA can impact the endocrine system—the glands that produce hormones. In one registry, 53% of patients developed at least one endocrine disorder (often those with extensive steroid or iron exposure) ^[8].

• Adrenal Health: Chronic steroid exposure commonly suppresses the hypothalamic-pituitary-adrenal axis. Adrenal insufficiency requires careful monitoring to ensure the body can handle the stress of illness or surgery ^[8].
• Growth and Puberty: Growth hormone deficiency (7%) and delayed puberty or hypogonadism (29%) are reported ^[8]. A pediatric endocrinologist should track height velocity and developmental milestones annually ^[8][9].
• Bone Density: Because of both the disease and steroid use, patients are at risk for low bone density (osteopenia or osteoporosis). Regular Vitamin D checks and bone density scans (DEXA) are often utilized based on clinical history ^[8].

The Importance of Lifelong Iron Monitoring

Even if transfusions stop or a transplant is performed, iron levels in the liver can remain high for years ^[10]. Survivorship care includes:

• Serial Ferritin: Regular blood tests to track the trend of iron stores.
• MRI Monitoring: Periodic Liver MRI (LIC) and Cardiac T2 MRI* are risk- and history-based decisions used to ensure that iron isn’t quietly damaging the heart or liver ^[10][11].

Staying diligent with these screenings is the most powerful tool you have to ensure a long, healthy life beyond the initial DBA diagnosis.