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. Author manuscript; available in PMC: 2017 Jun 1.
Published in final edited form as: Curr Pharmacol Rep. 2016 Mar 11;2(3):113–128. doi: 10.1007/s40495-016-0055-0

Figure 1. MedDRA features.

Figure 1

(A) The five layers of MedDRA. (B) A subset of the MedDRA hierarchy. It is a screenshot made from the MedDRA visualization in NCBO BioPortal (http://bioportal.bioontology.org/ontologies/MEDDRA). It is problematic to list a term ‘Acute and chronic thyroiditis’ as the parent term of other thyroiditis terms including ‘thyroiditis’ itself. Instead of being a subtype of ‘Acute and chronic thyroiditis’, ‘Thyroglossal cyst infection’ is an infection process that may cause thyroiditis.