Soft-tissue sarcoma
（重定向自Soft Tissue Sarcoma）
![Undifferentiated soft tissue sarcoma in left lung of young child](/Images/godic/202502/12/Undifferentiated_soft_tissue_sarcoma_in_left_lung_of_young_child3029.jpg")
A soft-tissue sarcoma is a form of sarcoma that develops in connective tissue, though the term is sometimes applied to elements of the soft tissue that are not currently considered connective tissue.