from https://www.omim.org/help/faq#1_3
No symbol before an entry number generally indicates a description of a phenotype for which the mendelian basis, although suspected, has not been clearly established or that the separateness of this phenotype from that in another entry is unclear.
OMIM terms without any symbols should be on the exclude list, using the exclusion code : MONDO:excludeTrait (@nicolevasilevsky, do you agree with this exclusion code?)
query Mondo for terms with Mondo:EquivalentTo = OMIM terms without symbols (--> these terms should be obsoleted) .
sabrinatoro
commented
1 year ago
from https://www.omim.org/help/faq#1_3 No symbol before an entry number generally indicates a description of a phenotype for which the mendelian basis, although suspected, has not been clearly established or that the separateness of this phenotype from that in another entry is unclear.