The Board has granted service connection for mast cell activation syndrome (MCAS) as secondary to the Veteran's service-connected posttraumatic stress disorder (PTSD). The evidence is at least in equipoise that MCAS was aggravated by PTSD.
The deciding factor: The medical opinion provided by Dr. I.N., M.D. FACP, FCCP supports a connection between the service-connected PTSD and the current mast cell activation syndrome (MCAS), creating an equipoise situation which must be resolved in favor of the Veteran.
- Claimed conditions
- mast cell activation syndrome (MCAS)
- How they argued it
- Aggravation of a pre-existing condition
- Exposure basis
- None
- Rating
- Not verified here — check the original decision
- Decision date
- October 29, 2020
- Citation
- 20070090
Veterans Law Judge
Decisions by this judge: 1,185 · Granted: 28% (granted or partly granted, in the indexed decisions on this site)
Judge attribution: 2025 complete; earlier years partial.
This is a plain-language summary generated by AI from a public Board of Veterans’ Appeals decision. It can contain errors — always verify against the original. Read the original VA decision (opens in a new tab) using citation 20070090.
What this means for you
A grant means the Board allowed the benefit or issue identified in this decision. Review the original order: other issues in the same appeal may have a different outcome, and this decision does not predict another claim.
What you can do next
Use your own notice and decision stage. A remanded issue is not a final court-appealable denial. VA review guidance and CAVC filing instructions (U.S. federal; reviewed October 7, 2026).
Related decisions
Other Board decisions on a similar condition or argued the same way.
- Whole decision: Remanded (sent back)
The Board has decided that the Veteran should be scheduled for a DRO hearing due to her request, and the appeal is being remanded accordingly.
- Whole decision: Remanded (sent back)
The Veteran's right shoulder disability and migraines/chronic headaches are remanded for additional development due to insufficient opinions on the etiology of her conditions.
- Whole decision: Granted
The Board has determined that the Veteran's lumbar spine arthritis is aggravated by his service-connected bilateral knee disabilities, and thus grants service connection for this condition.
- Whole decision: Granted
The Veteran's PTSD is granted as service connected due to his fear of hostile military activity during his Vietnam service.
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