Positive smooth muscle antibody (1:80) after hepatitis A, but normal liver enzymes and negative ANA — how concerned should I be?
Hi everyone,
I’m trying to make sense of some lab results and I’m having trouble getting clear follow-up from my doctor, so I wanted to ask here for perspective.
Background:
- I had Hepatitis B last year (unclear if resolved vs chronic — currently trying to confirm full status)
- I had Hepatitis A this year and recovered
- About ~2 months after Hep A recovery, I had repeat labs and an ultrasound
June labs (2 months post Hep A):
- AST: 19 (normal)
- ALT: 23 (normal)
- ANA screen: Negative
- Smooth muscle antibody (ASMA/SMA): Positive
- SMA titer: 1:80
- Ferritin: 52 (range 38–380)
- Liver ultrasound: normal (no abnormalities reported)
Symptoms:
I currently feel recovered and do not have ongoing symptoms like jaundice, fatigue, or RUQ pain.
My concern:
The only abnormal finding is a positive smooth muscle antibody at 1:80, but my liver enzymes are normal and ANA is negative.
I’ve read this can sometimes be associated with autoimmune hepatitis, but I also understand it can appear after infections or be nonspecific.
Given the context of:
- recent Hep A infection
- prior Hep B history
- otherwise normal liver tests and imaging
I’m trying to understand:
- How significant is an isolated SMA 1:80 with normal ALT/AST?
- Is this something that commonly resolves after viral hepatitis?
- What additional tests would typically be done next (IgG, repeat labs, etc.)?
- At what point is autoimmune hepatitis actually suspected vs monitored?
I’m not looking for a diagnosis, just trying to understand how hepatologists usually interpret this pattern and what follow-up is considered standard.
Thanks in advance to anyone who can share experience or medical insight.