The answer is “It depends”. Here is an excerpt for you. It is definitely worth reading this writeup .
Depending upon the type and location a biopsy might be needed as justification for the surgery.
“In a study reported in The American Journal of Surgical Pathology, the clinical features of 42 LEIOMYOSARCOMAS were analyzed. ” In a univariate analysis age >62 years, size >4 cm, extensive necrosis, modified updated French Federation of Cancer Centers (FFCC) grade, and whether the tumor had been “disrupted” by a previous incisional biopsy or incomplete excision were significantly correlated with metastasis…. Disruption was the only significant risk factor for metastasis in a multivariate analysis (relative risk 2.70; p = 0.0001) but was strongly correlated with large size and deep location .”
The study concluded, “The risk of metastasis can be calculated from a model incorporating age, FFCC grade, and disruption. Because disruption correlates with size and depth, it could represent a surrogate as opposed to causal marker for metastasis. Nevertheless, in view of their vascular origin, the possibility that tumor disruption may facilitate or promote access to the bloodstream merits further study.”