"Melena" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus,
MeSH (Medical Subject Headings). Descriptors are arranged in a hierarchical structure,
which enables searching at various levels of specificity.
The black, tarry, foul-smelling FECES that contain degraded blood.
This graph shows the total number of publications written about "Melena" by people in this website by year, and whether "Melena" was a major or minor topic of these publications.
To see the data from this visualization as text, click here.