R. Mund ( Leipzig ), C. Kunze ( Halle )  

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11 Years  

Female  

Arm-Bones  

congenital  

11 year-old girl with a dorsal and a lateral swelling of the proximal humerus with pain on pressure and hard.  

An exostosis belongs to the benign bone tumors and is an osteoma which consists of a thorn-like part and an overlying cartilaginous cap. It arises from the bone surface, is mostly located in the long bones in proximity to the zones of growth, whithout touching the epiphyseal gap.  

<- view X-Ray 1

X-ray 1: right Humerus, saggital: A stalked and a broad-based exostosis.



<- view X-Ray 2

X-ray 2: dorsal exostosis longitudinal.



<- view Ultrasound 1

Ultrasound 1: Humerus, transversal: both exostoses (echogenic protrusion) with the above-lying hypoechoic cartilage cap.



<- view Ultrasound 2

Ultrasound 2: Humerus, transversal: dorsal exostosis with measured cartilage cap.



<- view Ultrasound 3

Ultrasound 3: Humerus, transversal: dorsal exostosis with measured cartilage cap.

 

Surgery / Histo  

In a thick cartilaginous cap > 3 cm, a malignant illness must be ruled out.
 

Seldom this becomes malignant.  

About 4 cm distally, proof of the vessels which cross humerus, whose brances correspond to the Brachii profunda arteries and veins. They are important as a guide to locate the radial nerve preoperatively.  

N/A  

N/A  

Exostosis, humerus, epiphyseal, Exostosis of the proximal humerus, arm pain, benign bone tumor, osteoma, osteochondroma, child, childhood, pediatric radiology  

R Mund, C Kunze. Exostosis of the proximal humerus, right. PedRad [serial online] vol 2, no. 7.
URL: www.PedRad.info/?search=20020704144257