Table 1.

Histopathological characteristics of undifferentiated pancreatic tumors.

UCOGC	Sarcomatoid	Rhabdoid
Spindle-shaped cells	Spindle-shaped cells	Mimicking rhabdamyoscarcoma
Giant osteoclast-like cells	Pleomorphic cells	Monomorphic cells
Mononuclear cells	Mononuclear and multinuclear cells	Prominent nuclei
High mitotic index	Glandular formation	Cellular and nuclear pleomorphism may be absent
	Mimics sarcoma	Rhabdoid inclusions
	Osteoclast-like giant cells are usually absent	Loss of SMARCAB1/INI1