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Revista chilena de radiología

versión On-line ISSN 0717-9308

Resumen

OYANEDEL Q, Roberto et al. RADIOGRAPHIC STUDY IN BENIGN EPIPHYSEAL CHONDROBLASTOMA DIAGNOSIS: ANATOMORADIOLOGICAL CORRELATION. Rev. chil. radiol. [online]. 2007, vol.13, n.4, pp.185-190. ISSN 0717-9308.  http://dx.doi.org/10.4067/S0717-93082007000400003.

Introduction: A chondroblastoma is a rare, usually benign, tumor of bone that accounts for approximately 1% of all bone tumors, which mainly affects the growing skeleton. Local pain is the most common presenting symptom, and for some patients it implies functional involvement due to its periarticular site. Chondroblastoma most commonly affects the epiphysis of long bones, specially occuring on the lower extremities. Usually, radiography is the first diagnostic imaging technique to be performed and its relatively characteristic findings may cause alarm or lead to misdiagnosis. Computed Tomography (CT) or Magnetic Resonance Imaging (MRI) are complementary studies that best show the lesion, its extension, and soft tissue involvement. Objectives: To present the most frequent manifestations of chondroblastoma in radiographies, establishing the anatomoradiological correlation of lesions. Material and Methods: Thirty-six patients with histologicallyproven chondroblastoma, who were registered in the National Register of Bone Tumors, between 1959 and 2004, were retrospectively investigated under clinical and radiological viewpoints. Results: Thirty-six patients (26 male, 10 female) whose ages ranged from 5 to 19 years (mean age 14.5 years) were studied. In all cases, biopsy results confirmed the diagnosis of chondroblastoma. Bone lesions were sited as follows: long bones of lower extremities in 22 patients; long bones of upper extremities, 8 cases; feet bones, 3 patients; pelvis, 3 cases, and rib cage in 1 case. Lesions, which were unique in all cases and involved epiphyseal region, were predominantly osteolytic in 30 patients. Metaphyseal extension was found in 28 patients. Eccentric bone lesions were seen in 27 cases, while calcifications were present in 18 patients and 9 cases were found to have soft tissue extensions. Conclusions: Benign epiphyseal chondroblastoma is an unusual bone lesion occuring in young patients, with well-characterized and constant radiographic features translating in improved possibilities for the radiologist to get a proper diagnosis from initial radiographic study

Palabras clave : Epiphyseal chondroblastoma; Radiography.

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