Abstract
In international literature, several cases of multicentric osteoid osteoma have been described. Clinical presentations with a double nidus in the same bone, in adjacent bones or in symmetric bones have been reported.In the present study the authors report a case of an osteoid osteoma of the right distal femur in a forty-five years old man with a history of osteoid osteoma of the left distal femur treated thirty-four years earlier. To our knowledge, only two similar cases were known so far.
Highlights
The Osteoid Osteoma (OO) is a benign osteoblastic bone tumour, firstly described by Jaffe in 1935 [1]
Atypical osteoid osteomas are important because the diagnosis and treatment are often complicated in these cases [6]
Five cases of Osteoid Osteoma in two adjacent bones were reported: the presentation of the two lesions was synchronous in 4 cases [33,34,35,36] and metachronous in one case [37]
Summary
The Osteoid Osteoma (OO) is a benign osteoblastic bone tumour, firstly described by Jaffe in 1935 [1]. It usually arises in long bones of children and young adults, but the localization in the spine [2] or in short a bone is not unfrequent [3,4,5]. Atypical osteoid osteomas are important because the diagnosis and treatment are often complicated in these cases [6]. The objective of the present report was to describe a particular case of Osteoid Osteoma of the right distal femur in a forty-five years old man with a history of Osteoid Osteoma of the left distal femur thirty-four years before. In international literature many cases of multicentric or double nidus Osteoid Osteoma and few cases of Osteoid Osteoma with double localization in the same bone, in adjacent bone, in symmetric bone and only three cases in different bone were described [7]
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