Loss of INI 1 Protein Expression

**Semantic type:** Laboratory or Test Result

**Definition:** An immunohistochemical finding indicating negative staining of tumor cells for INI 1 protein, resulting from the inactivation of the INI 1 tumor suppressor gene.

**Synonyms:** - Loss of BAF47 Protein Expression - Loss of INI1 Protein Expression - Loss of SMARCB1 Protein Expression - Loss of SNF5 Homolog Protein Expression - Loss of SWI/SNF-Related Matrix-Associated Actin Dependent Regulator of Chromatin Subfamily B Member 1 Protein Expression