Introduction. It is known that bone tumors have a predilection to develop for a certain skeletal bone segment. Also, bone tumors have a predilection for certain age groups. The knee is a common site for bone tumors. Purpose. Presentation of diagnostic parameters of conventional radiography as the first technique in the detection and characterization of bone tumors developed at the knee level and the criteria for differentiation of the malignant substrate from the benign (the type of bone destruction, the type of periosteal response, poorly defined margins) one. The value of MRI is also presented and illustrated as a unique imaging technique that allows the direct visualization of bone marrow with high spatial resolution for local staging of bone tumors. Material and method. The present study aimed to investigate the radiographic and MRI imaging characteristics of bone tumors developed at the knee joint, which were retrospectively analyzed (October 2007 and November 2017) in a selected group of 91 patients. The limit of age between 11 and 67 years, 73(70%) men, 18 (30%) women. Examination protocol: complete clinical examination, radiographic knee examination in anteroposterior and lateral incidents. MRI standard protocol, native, and post paramagnetic contrast. Results. Conventional Radiographic and MRI have been detected and characterized a number of 55 (67%) primary malignant bone tumors confirmed by histopathological diagnosis, ranging from 8 histopathological types and 37 (33%) cases of benign tumors with 9 histopathological types. Conclusions. Radiological examination is the first investigation in the evaluation of knee bone tumors, suggesting the malignant nature expressed by the badly defined margin, bone destruction, discontinuous peristaltic reaction, and extension to the soft parts. MRI is a unique imaging technique that allows direct visualization of bone marrow with high spatial resolution and best tool for local staging of bone tumors.
Introduction. Due to the non-specific clinical findings and the reduced sensitivity of conventional radiography, soft tissue tumors (STT) were virtually unknown to radiologists until ultrasonography and computerized tomography were introduced. Because of its superior soft tissue contrast, multiplanar imaging capability, Magnetic Resonance Imaging (MRI) is the favored modality for the evaluation of soft tissue tumors. Purpose. MRI detection, characterization, and illustration of soft tissue tumors developed in the musculoskeletal system Material and method. The retrospective study refers to a group of 77 patients with suggestive clinical symptomatology for a soft-expanding process developed in the musculoskeletal system. Patients were examined according to a protocol that included complete clinical examination, two incidents radiographic examination, MRI, histopathological examination. The group consisted of 44 men (57%) and 33 (43%) women, aged between 7 and 80. Results. We presented the spectrum of identified types of tumors based on the MRI semiology elements (homogeneity and intensity of the signal in the native and post-contrast standard sequences, intra or extra compartmental localization, tumor size and shape), segmental location, and incidence relative to the histological type. Conclusions. Through high contrast resolution and the ability to acquire and display multiplanar, MRI is currently investigating choice in the detection and characterization of soft tumor tumors. The multiplanar images (axial, frontal, sagittal and oblique) provide complete data on the actual tumor extension, the appearance of vessels, nerves, bone segments, and adjacent joints to tumor formations, allowing the proper staging and appropriate therapeutic behavior.