a slight modification of world health organization ( who ) classification by the separation of spindle cell variant from the nonkeratinizing ( nk ) and undifferentiated carcinomas ( ud ) provided a better prognostic correlation : keratinizing squamous cell carcinoma ( ks ) , spindle cell carcinoma ( sp ) , round cell carcinoma ( rc ) , and mixed cell carcinoma ( mix , or nk ) ;
C0262584
round cell carcinoma
C0007097
carcinoma