PML (rare brain infection in weak immune systems)

Overview

A virus attacks the brain when the immune system is weak.

Symptoms

Common signs:

• Weakness, vision, or thinking changes

Less common

• Trouble speaking

Look up a symptom: Blurry vision · Muscle weakness in arms or legs · New confusion or not acting like themselves

When to get medical care

Causes

JC virus.

Does it spread or run in families?

• The illness itself usually isn't passed to others, but some germs that cause it can spread.
• Washing hands often helps.

Who is more likely to get it

• HIV
• Immune medicines

Diagnosis

A clinician asks about your symptoms and may order tests.

The exam

A physical exam.

Tests

Tests, if needed:

• MRI:
• Spinal tap:

Treatment

Treatment depends on the cause and how severe it is.

Self-care

• Report new symptoms right away
• Do rehab

Prevention

To lower your risk or prevent problems:

• Ask about PML risk with immune medicines

Which doctor treats this

• Start with your primary care provider (family doctor or internist).
• They may send you to a neurologist (brain and nerve doctor).

Living with it

• Keep a simple diary of symptoms, triggers, and medicines to bring to visits.
• Bring a list of your medicines and questions to each visit.
• Keep a regular sleep schedule and don't skip meals.
• Limit alcohol and caffeine if they make symptoms worse.
• Long-term illness can affect mood. Tell your doctor if you feel down or anxious.

Back to school, work, or sports

• Most people can keep working or going to school.
• Ask about changes that help, like extra breaks or a flexible schedule. Workers may be covered by the ADA. Students may get a 504 plan.

Children, pregnancy, and older adults

• People with HIV: Higher risk.
• People on immune medicines: Higher risk.

Pregnancy and breastfeeding

• If you're pregnant or planning to be, tell your prenatal provider about this condition.
• Some infections can pass to the baby during pregnancy or birth. Tell your provider if you've been exposed.
• Don't start or stop any medicine on your own. Some are safe in pregnancy and some need to be changed.
• Ask before taking any pain reliever. The FDA advises avoiding ibuprofen and naproxen after 20 weeks unless your doctor says to.
• Breastfeeding: Most medicines are fine, but ask. The NIH LactMed database lists what's known about each one.

For caregivers

• Go to visits when you can and take notes.
• Keep a list of medicines, allergies, and doctors in one place.
• Learn the warning signs that need fast care.
• Take breaks and ask for help. Caregivers need care too.

Outlook

Restoring immune function helps some.

Getting ready for your visit

Bring a list of your symptoms and medicines.

What to bring

• A list of your medicines and supplements
• Notes on when symptoms started and what makes them better or worse

Questions to ask

• What's causing this?
• What treatment do you recommend?

Research studies

Research studies test new ways to find and treat health problems. Some are looking for volunteers. Talk with your doctor before joining one.

Search ClinicalTrials.gov for studies on PML (rare brain infection in weak immune systems)