Left side rib row long tumor is mostly seen in subcutaneous lipoma, osteochondroma, malignant myeloma and other lesions. Subcutaneous lipoma: it is a kind of common benign tumor, mainly seen in subcutaneous, rarely malignant, and can be removed by surgery. 2. Osteochondroma: also called traumatic bone warts, it is a kind of common benign tumor, the most common parts are short tubular bones of hands and feet, long bones of limbs, and ribs are also involved, which are divided into two kinds: single and multiple. Malignant myeloma: it is also called plasma cell tumor, often multiple, such as spine, pelvis, ribs, sternum and other parts, bone marrow biopsy can confirm the diagnosis. There may be other reasons for the tumor on the left side of the rib row, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.