An nuclear body involved in nuclear mRNA surveilllance. Contains at least Mmi1, or an ortholog of it, and the nuclear exosome. [ GOC:al http://www.ncbi.nlm.nih.gov/pubmed/23980030 GOC:vw http://www.ncbi.nlm.nih.gov/pubmed/16823445 http://www.ncbi.nlm.nih.gov/pubmed/32012158 ]
Synonyms: Mmi1 nuclear focus