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STS commonly present as firm, fixed masses (Liptak and Forrest 2013). STS generally grow slowly, and symptoms are related to the site of involvement and the degree of invasion. They can cause dysfunction of an involved organ or signs can be caused by pressure onto surrounding structures. About 60% of STS are found on the limbs, 35% on the trunk, and in 5% the head is involved (Chase et al. 2009; Liptak and Forrest 2013).

Large or fast‐growing STS can cause skin ulceration. Tumor necrosis can develop due to fast expanding growth (Liptak and Forrest 2013).