NOUN (1)

1. a malignant tumor of the epithelial tissue;

The Collaborative International Dictionary of English v.0.48:

Epithelioma \Ep`i*the`li*o"ma\, n. [NL. See Epithelium, and
   -oma.] (Med.)
   A malignant growth containing epithelial cells; -- called
   also epithelial cancer.
   [1913 Webster]