Keywords: cancer, pediatrics (PubMed Search)
Bone tumors can present as MSK pain!
Pain may be activity related initially (can lead to misdiagnosis)
Over time will progress to rest pain and night pain
1) Primary osteosarcoma - most common primary malignant bone tumor
Adolescents, male > female
70% occur about the knee (also in hip/pelvis and upper arm)
pain, swelling, tenderness to palpation
Consider in the presentation of non traumatic knee pain!
2) Ewing's sarcoma
Peak incidence ages 10-20, male > female
pain, swelling, tendernes to palpation
Elevated temps and ESR
Consider in the differential of osteomyelitis!!
Variable location - lusually the extremities but also pelvis, scapula, ribs