1) Benign tumor 2) Benign tumour 3) Nonmalignant neoplasm 4) Nonmalignant tumor 5) Nonmalignant tumour 
• (n.) A tumor made up of a gelatinous tissue resembling that found in the umbilical cord.
(mik-so´mә) a tumor composed of primitive connective tissue cells and stroma resembling mesenchyma. adj., myxo´matous., adj.
Myx·o'ma noun ; plural Myxomata . [ New Latin , from Greek ... mucus + - oma .] (Medicine) A tumor made up of a gelatinous tissue resembling that found in the umbilical cord. 
Type: Term Pronunciation: mik-sō′mă Definitions: 1. A benign neoplasm derived from connective tissue, consisting chiefly of polyhedral and stellate cells that are loosely embedded in a soft mucoid matrix, thereby resembling primitive mesenchymal tissue; occurs frequently intramuscularly (where it may be mistaken for a sarcoma), also...
Myxoma: A benign tumor composed of primitive connective tissue. The plural is myxomas or myxomata.
[n] - a benign tumor of connective tissue containing jellylike material
myxoma A benign tumor, most often found in the heart, composed of connective tissue embedded in mucus.
a noncancerous tumour made of mucous material and fibrous connective tissue 
noun a benign tumor of connective tissue containing jellylike material
a soft tumor composed of connective and mucoid tissue.