1,721,069 research outputs found
Osteoblastoma of the Sacrum
No full textThis book provides an up-to-date overview on the epidemiology, clinical presentation, and imaging characteristics of sacral tumors, discusses the available treatment options, and reports the published outcomes. The diagnostic roles of conventional radiology, CT, and MRI are thoroughly described and imaging appearances are compared with the histologic features. The coverage of therapeutic approaches includes chemotherapy, radiotherapy, radiosurgery, and surgery (partial or total sacrectomy and spinopelvic reconstruction). Special attention is paid to the specific anatomic constraints that make tumors in this region of the spine more difficult to manage effectively than those in the extremities and the mobile portions of the spine.
All components of the sacrum can give rise to benign or malignant tumors, which pose significant diagnostic and therapeutic challenges. Although these tumors are often diagnosed at an advanced stage, good clinical outcomes may be achieved if an aggressive multidisciplinary approach is used. This book will be of value for a range of practitioners; it will assist in prompt diagnosis and help to overcome lack of familiarity with the required treatment strategies
Unusual supero-medial iliac fatigue stress fracture.
No full textFatigue stress fractures are quite common in athletes, especially in women. They typically involve the lower extremities, but they have also been described in the pelvis and sacrum. Most of the time, they are radiographically occult at the beginning, and become visible only when the callus is detected. They are suspected owing to their clinical features, and investigated using magnetic resonance imaging (MRI) and computed tomography (CT). We present a case of unusual supero-medial iliac fatigue stress fracture in a 58-year-old amateur marathon runner woman presenting with a history of 1-month's worsening pain in the right buttock. Diagnosis was challenging. The early radiograph was normal, and the stress fracture was suspected by clinical features and MRI. Although the fracture was evident on the MRI, the findings were subtle and overlooked. The fracture was later confirmed by CT and radiograph, showing the reparative process
Elastofibroma of the gluteal region with a concomitant contralateral lesion: case report and review of the literature
No full textA 51-year-old man presented with elastofibroma (EF) of the gluteal region with a concomitant contralateral lesion. The patient presented with a slow growing mass of the proximal third of the right buttock and had swelling, discomfort in sitting, and right-hip pain during walking for 2 months. On MRI, a soft-tissue mass was noted between the gluteus maximus and the gluteus medius muscle. The mass showed similar signal intensity to the surrounding tissue on T1- and T2-weighted images and with linear hyperintense areas in its internal structure. At surgery, a soft, non-encapsulated, irregular, and rubber-like mass was found attached to the gluteus medius muscles. It was pathologically confirmed to be an EF. This unusual manifestation of an EF is discussed
Epithelioid hemangioma of bone: A unique case with multifocal metachronous bone lesions
No full textEpithelioid hemangioma of bone is a rare vascular neoplasm with a ubiquitous distribution. To date, up to 25% epithelioid hemangioma of bone presents synchronous bone lesions. We report a unique case of epithelioid hemangioma with multifocal metachronous bone lesions without any fatal outcome observed after a long period. Importantly, a strong nuclear expression of FOSB antibody was detected by immunohistochemical analysis. In this case, the pathologic and radiologic findings are also described. We suggest that epithelioid hemangioma can present multifocal metachronous bone lesions without producing a fatal outcome
Epidemiology
No full textSoft tissue tumors (STT) are a heterogeneous group of benign and malignant processes. Some are assumed reactive, others are clearly neoplastic. These lesions account for less than 4 % of all tumors in adult patients and for 7–10 % of all tumors in pediatric patients. More than 99 % of STT are benign, and the incidence of malignant STT is about 4–5 times that of malignant tumors arising from the bone
The incidental skeletal lesion: ignore or explore?
No full textThe 'leave me alone' bone lesions are very classical, and, as indicated by their name, do not require any further investigation. There are very typical cases, and there are also more difficult ones, and they can be especially difficult to manage if the patient has a known cancer
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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