Discrete synchronous multifocal osteoid osteoma of the humerus |
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Authors: | P Schai N Friederich A Krüger G Jundt E Herbe P Buess |
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Institution: | Orthop?dische Universit?tsklinik Basel, Felix Platter-Spital, CH-4012 Basel, Switzerland, CH Bone Tumor Reference Center, Institute for Pathology, University of Basel, Basel, Switzerland, CH Institute for Medical Radiology, Rodiag, Olten, Switzerland, CH Orthopaedic Surgery, Luzern, Switzerland, CH
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Abstract: | A 24-year-old patient is described who had a 4-year history of pain in the right upper arm, with distinct night pain, that
responded to salicylates. From the findings on conventional radiography, bone scintigraphy and MRI a multifocal osteoid osteoma
was suspected, with one focus in the cancellous region of the greater tuberosity and a second cortical focus at the proximal
humeral diaphysis. The resection ’’en bloc’’ of both tumors and histological examination confirmed the diagnosis. The patient
was painfree after the curative resection of the two osteoid osteomas. Osteoid osteoma is a frequently found benign bone tumor,
accounting for approximately 11% of cases. In rare cases a multicentric occurrence has been described. A possible occurrence
of more than one osteoid osteoma in a single bone, not verified histologically, has been reported only three times in the
literature. In patients with scintigraphic and radiographic findings of two foci, discrete synchronous multifocal osteoid
osteomas should be suspected. |
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Keywords: | Osteoid osteoma Multifocal occurrence Humerus Excision MRI findings |
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