Continuous pain and swelling after humerus fracture in an 86-years-old woman.

Metastases to bone are the most frequent cause of destructive lesions to the skeleton in adults . The tumours that are most likely to metastasize to bone are prostate (32%), breast (22%), kidney (16%), lung and thyroid. The typical distribution of metastatic lesions are to the spine, ribs, pelvis, and proximal limb girdles. The humerus is the second most common site for long bone metastases, behind only the femur in its frequency of involvement . It represents the 20% of all bony metastases. We present a clinical case of an 86 yo woman with a previous diagnosis of myofibroblastic sarcoma of the maxillaris who suffers a pathological fracture of the humeral shaft secondary to metastasis and was misdiagnosed and treated for a typical humeral fracture using and intramedullary pinning (Hackethal technique), producing the progression of the disease within the humeral shaft. Due to the end state of the disease (multiple metastases), we decided to perform a palliative treatment with radiotherapy. This particular case report does confirm that is very important to rule out a malignancy in cases of osteolytic or poorly marginated lesions, particularly in patients older than 40 years of age. Therefore, it is imperative that the treating physician has a rational and effective approach to the diagnostic evaluation and treatment of these patients in order to avoid a malpractice.