Pathology: NR1D1-rearranged mesenchymal neoplasm (emerging)

Fascicles of spindle-epithelioid  cells 

Pale amphophilic cytoplasm 

Ovoid- nuclei with moderate pleomorphism; mitotic activity 

RNA-seq: NR1D1::MAML2 gene fusion

PMID:  32474730, 35168293, 38084644

Sheets of polygonal-epithelioid  cells

Pale amphophilic cytoplasm 

Ovoid-reniform nuclei with prominent nucleoli and mild pleomorphism; mitotic activity 

RNA-seq: NR1D1::MAML2 gene fusion

PMID:  32474730, 35168293, 38084644

Spindle-polygonal cells in fascicular-storiform-whorled pattern

Pale eosinophilic cytoplasm 

Ovoid-reniform nuclei with mild pleomorphism; occasional mitotic activity 

RNA-seq: NR1D1::MAML2 gene fusion

PMID:  32474730, 35168293, 38084644