It is believed that sarcomatoid carcinomas develop from more common forms of epithelial tumors.

[3] Sarcomatoid carcinomas have been identified in the small intestine in rare cases.

They may have epithelioid and mesenchymal properties or be composed only of mesenchymal-type spindle cells, and are negative for CD117 and DOG1.

[4] Some cases of sacromatoid carcinoma of the larynx are resistant to radiotherapy.

[2] This type of tumour have less than 1% incidence of all primary lung cancers.