Introduction:

the Solitary Bone Cyst (QOS) has been recognized for many years as a benign injury; it's a cavity full of clear liquid.

Clinical case:

12-year-old male patient, who says that two years ago he suffered a fall from his feet causing him a mild trauma at the level of the right humerus, was seen urgently in the guard corps diagnosing a pathological fracture of right humerus by a solitary bone cyst. It was treated conservatively with U-gypsum splint and later humerus and plaster Velpeaux for 2 months. After 1 year the patient comes because he has slight pain and increased volume in the antero-external region of right humerus without color change. Physical Examination: Slight pain to palpation, increased volume and limitation to the movements of abduction and flexo extension of the right arm.

Discussion:

x-ray was indicated to show: Well-delimited metaphysarian lesion, lucid radius, with the cortical thinned, crossed by septums.

Conclusions:

a solitary bone cyst was diagnosed. The surgical treatment performed was scraping and filling with Hydroxyapatite.

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