Monitoring and Action Plans: Symptoms and Red Flags

Living with CD70 deficiency requires a careful balance of active surveillance and perspective. Because the immune system has a specific vulnerability to the Epstein-Barr Virus (EBV), it is natural to worry about every sniffle or scratch.

Understanding the difference between chronic stability and acute progression is key to managing health and peace of mind. Establishing a concrete communication and action plan with your specialist will help you navigate when to observe and when to seek urgent care.

Creating an Action Plan for Chronic Symptoms

Every patient with a combined immunodeficiency should have a personalized action plan created with their specialist. Do not rely on static lists to triage symptoms. Many individuals live with ongoing health challenges that require adherence to an action plan rather than waiting:

• Chronic EBV Viremia: It is common to have EBV detectable in the blood. Some patients have lived for over 15 years with high levels of the virus ^[1].
• Recurrent Airway Infections: Frequent colds, sinus infections, or bronchitis are common and are often managed with scheduled appointments and immunoglobulin replacement ^[1][2].
• Mild Lymphadenopathy: Persistent or slowly changing “swollen glands” (lymph nodes) are a feature of the immune system’s struggle with EBV ^[1].
• Dental Issues: Severe gingivitis or periodontal disease (gum disease) can occur and requires specialized dental care ^[1][3].

Your action plan should include your specific fever threshold, same-day call instructions, an Emergency Contact for after-hours, and a Crisis Plan Letter signed by your immunologist.

When to Contact Your Specialist (Same-Day)

Some symptoms require an urgent call to your immunology or hematology team, even if they do not immediately seem like an emergency. These signs suggest the balance may be shifting and need a professional evaluation, likely including blood work or imaging.

• Persistent Fever: Any fever in a patient with a combined immunodeficiency requires adherence to your specialist’s action plan. Do not wait to report a fever.
• Rapidly Changing Lumps: Lymph nodes that are growing quickly, feel hard, or are becoming painful ^[4][5].
• B-Symptoms: Unexplained weight loss, drenching night sweats, or extreme fatigue ^[6].
• New “Fullness”: A noticeably swollen belly or a feeling of “fullness”, which may indicate an enlarged liver or spleen (hepatosplenomegaly). Allow a clinician to examine this ^[5][7].

RED FLAGS: Seek Emergency Care Immediately

Certain symptoms indicate a rapidly evolving, life-threatening complication, such as a severe infection, HLH (Hemophagocytic Lymphohistiocytosis), or a rapidly progressing lymphoproliferative disorder. If you notice any of the following, go to the nearest emergency department immediately:

Neurologic Changes

• New seizures or unusual “spacing out.”
• Extreme sleepiness, lethargy, or difficulty waking up.
• Sudden confusion, speech changes, or weakness on one side of the body ^[8][9].

Respiratory and Airway Issues

• Difficulty breathing, fast breathing, or using chest muscles to “pull” in air.
• Sudden difficulty swallowing or handling saliva (drooling).
• A “barky” cough or noisy breathing (stridor) that suggests airway swelling ^[4][10].

Signs of HLH or Severe Organ Dysfunction

• Jaundice: Yellowing of the whites of the eyes or the skin ^[11].
• Unusual Bleeding: Severe nosebleeds that won’t stop, or tiny red/purple spots on the skin (petechiae) ^[12].
• High Fever and Severe Illness: A high fever accompanied by a “toxic” look (the patient looks extremely ill, pale, or grey). Persistent fever can be an early sign of HLH ^[13].

Severe Viral Rashes

• A widespread, painful, or rapidly spreading rash (like severe chickenpox) especially if it involves the eyes or is accompanied by a severe headache ^[2].

In the emergency room, present your Crisis Plan Letter and state that you have a “Primary Immunodeficiency” and are at high risk for HLH. This helps them prioritize the specific evaluations and lab tests (like ferritin and fibrinogen) needed to keep you safe ^[13][14].