# Author response to the letter to the editor regarding “Headaches and lymphocytic pleocytosis after COVID-19 require the exclusion of encephalitis”

**Authors:** Vincent Umathum, Carolin König, Heidrun H. Krämer, Jens Allendörfer, Anne Schänzer

PMC · DOI: 10.1186/s42466-026-00460-0 · 2026-02-03

## Full-text entities

- **Genes:** TRB (T cell receptor beta locus) [NCBI Gene 6957] {aka TCRB, TRB@}, TRG (T cell receptor gamma locus) [NCBI Gene 6965] {aka TCRG, TRG@}
- **Diseases:** neuritis (MESH:D009443), weight loss (MESH:D015431), COVID-19 (MESH:D000086382), Headaches (MESH:D006261), dizziness (MESH:D004244), Bickerstaff encephalitis (MESH:D004660), cerebral lymphoma (MESH:D008223), atrial thrombus (MESH:D013927), sudden death (MESH:D003645), GBS (MESH:D020275), lymphocytic pleocytosis (MESH:D007964)
- **Chemicals:** thiazide (MESH:D049971), steroid (MESH:D013256), heparin (MESH:D006493)
- **Species:** Homo sapiens (human, species) [taxon 9606], human gammaherpesvirus 4 (Epstein Barr virus, no rank) [taxon 10376]

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Source: https://tomesphere.com/paper/PMC12870809