Background:

Osteosarcoma is one of the most common types of cancer in childhood and adolescence and it is the most common malignant bone tumor in this group of age. Osteosarcoma is frequently found in long bones of the extremities. There are very few cases described in children under 5 years of age, and according to this review, none in infants. The telangiectatic variant is uncommon, and there are no reported cases before preschool age.

Case report:

A 10-month-old female infant with a lithic tumor of the ninth right rib, which was classified after resection as a telangiectatic osteosarcoma, is presented.

Conclusions:

Telangiectatic osteosarcoma in the pediatric age is very uncommon. To date, the patient has presented good response to treatment, although the prognosis and survival of this condition is unknown.