malignant neoplasm

NOUN
18 LETTERS · STARTS WITH M

malignant neoplasm is a valid 18-letter word worth 24 points in Scrabble and 33 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
M3A1L1I1G2N1A1N1T1N1E1O1P3L1A1S1M3
3 + 1 + 1 + 1 + 2 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 3 =24 PTS
DOUBLE WORD → 48TRIPLE WORD → 72
MEANING

What does malignant neoplasm mean?