Hi @John_Reber,
The tissue site drop down only shows the leaf nodes. It might be possible that the value Pyloric lymph node is not a leaf node.
Regarding the REST API for the tissue site:
http://:/openspecimen/rest/ng/permissible-values?attribute=Tissue_Site_PID&includeOnlyLeafValue=true
You can check this with the above REST API or with the below SQL:
The SQL to get the leaf node values :
select
identifier, value
from
catissue_permissible_value
where
public_id = 'Tissue_Site_PID' and identifier not in
(
select
parent_identifier
from
catissue_permissible_value
where
public_id = 'Tissue_Site_PID' and parent_identifier is not null
)
~Nitesh