Overview of Vocabulary Development and Changes for 2012 MeSH

• 454 Descriptors added
• 42 Descriptor terms replaced with more up-to-date terminology
• 15 Descriptors deleted

Totals by Type of Terminology

• 26,582 Descriptors
• 83 Qualifiers
• 202,066 Supplementary Concept Records (SCRs)

Helpful Links

Please consult the 2012 online Introduction to MeSH for more details. Lists of new and changed vocabulary are available at these links:

MeSH Vocabulary Changes

New Descriptors – 2012

Changed Descriptors – 2012

Deleted Descriptors – 2012

New Descriptors by Tree Subcategory – 2012

Source: NLM New files for the week of Dec 5, 2011