There are multiple definitions:

1. oligoclonal band(English)

   • presence within the CSF is a long-known and well-established diagnostic finding in MS
   • CSF, MS
   • Diagnostics
   • https://doi.org…52001-2.00003-0

2. obstructive chronic bronchitis(English)

   • FLD
   • Pulmonology, Occupational disease
   • http://pubmed.n…ih.gov/9036502/