Benign soft tissue tumors, benign bone tumors | The Children's Hospital of Philadelphia

Orthopedic Surgery

Benign Tumors

The majority of tumors in children are benign tumors.

Benign soft tissue tumors

Aggressive and juvenile fibromatosis, including Desmoid tumors.
Hemangiomas, noncancerous tumors that are formed by a mass of blood cells. The tumor rarely become malignant, and can be successfully excised. They often result from trauma to the affected part.
Neurofibromatosis, a congenital (from birth) condition that involves fibrous tumors (neurofibromas) of nerve tissues. Neurofibromas may develop in the nervous system, and the condition may lead to malformation of bones and muscles.
Vascular malformations, tumors composed of malformed blood vessels.

Benign bone tumors

Aneurysmal bone cyst, a bone lesion that may develop in the long bones or vertebrae.
Arteriovenous malformations are abnormal, tangled collections of dilated blood vessels. A common type is the congenital arteriovenous fistula.
Baker's cyst, a cyst that forms at the back of the knee.
Chondroblastoma is a rare tumor that usually affects the growing segments (epiphysis) of the growing skeleton.
Chondromyxoid fibroma occurs in the shaft of the long bone.
Enchondromas, benign, slowly growing tumors of cartilage cells. They occur in the tubular bones in the hands or feet.
Eosinophilic granuloma can occur anywhere in the body, but it is most commonly found in the skull.
Fibrous dysplasia involves cystic bone growth resulting from abnormal bone development.
A hemangioma is a tangle of abnormal vessels forming an abnormal connection between the arteries and the veins.

Granuloma annulare is a self-limiting skin disease of unknown origin.
Lipomas, benign tumors composed of fatty tissue.
Neurofibromas are smooth tumors that arise from the Schwann cells and fibroblasts that cover the nerves.
Nonossifying fibroma is a common tumor, which sometimes needs to be removed to prevent fractures from occurring.
Osteoblastoma, benign vascular tumors made up of poorly formed bone and fibrous tissues. They most frequently occur in the vertebrae, femur, tibia or bones in the arms.
Osteochondromas, the most common form of noncancerous bone tumors. They usually occur in patients aged 10 to 20 years.
Osteoid osteomas, benign tumors of poorly formed bone and fibrous tissue. They occur most often in the vertebrae spinal bones), femur, tibia or bones in the arms.
Unicameral bone cyst, a solitary bone cyst that can occur anywhere in the skeleton. It is most commonly found in the upper part of the humerus (upper arm) and upper part of the femur. If it gets large enough to cause a fracture, the cyst usually heals with the fracture. If the cyst remains, the cyst may need to be removed.

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