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P Van Dyck

Publications and source records attributed to P Van Dyck.

14 recordsLinked to original sources
PubMed2006

Prevalence, extension and characteristics of fluid-fluid levels in bone and soft tissue tumors.

The purpose of this study was to determine the prevalence, extension and signal characteristics of fluid-fluid levels in a large series of 700 bone and 700 soft tissue tumors. Out of a multi-institutional database, MRI of 700 consecutive patients with a bone tumor and MRI of 700 consecutive patients with a soft tissue neoplasm were retrospectively reviewed for the presence of fluid-fluid levels. Extension (single, multiple and proportion of the lesion occupied by fluid-fluid levels) and signal characteristics on magnetic resonance imaging of fluid-fluid levels were determined. In all patients, pathologic correlation was available. Of 700 patients with a bone tumor, 19 (10 male and 9 female; mean age, 29 years) presented with a fluid-fluid level (prevalence 2.7%). Multiple fluid-fluid levels occupying at least one half of the total volume of the lesion were found in the majority of patients. Diagnoses included aneurysmal bone cyst (ten cases), fibrous dysplasia (two cases), osteoblastoma (one case), simple bone cyst (one case), telangiectatic osteosarcoma (one case), "brown tumor" (one case), chondroblastoma (one case) and giant cell tumor (two cases). Of 700 patients with a soft tissue tumor, 20 (9 males and 11 females; mean age, 34 years) presented with a fluid-fluid level (prevalence 2.9%). Multiple fluid-fluid levels occupying at least one half of the total volume of the lesion were found in the majority of patients. Diagnoses included cavernous hemangioma (12 cases), synovial sarcoma (3 cases), angiosarcoma (1 case), aneurysmal bone cyst of soft tissue (1 case), myxofibrosarcoma (1 case) and high-grade sarcoma "not otherwise specified" (2 cases). In our series, the largest reported in the literature to the best of our knowledge, the presence of fluid-fluid levels is a rare finding with a prevalence of 2.7 and 2.9% in bone and soft tissue tumors, respectively. Fluid-fluid levels remain a non-specific finding and can occur in a wide range of bone and soft tissue tumors, both benign and malignant. Therefore, they cannot be considered diagnostic of any particular type of tumor, and the diagnosis should be made on the basis of other radiological and clinical findings.

Adolescent↗
PubMed2002

Imaging of pulmonary tuberculosis.

Tuberculosis, more than any other infectious disease, has always been a challenge, since it has been responsible for a great amount of morbidity and mortality in humans. After a steady decline in the number of new cases during the twentieth century, due to improved social and environmental conditions, early diagnosis, and the development of antituberculous medication, a stagnation and even an increase in the number of new cases was noted in the mid-1980s. The epidemiological alteration is multifactorial: global increase in developing countries; minority groups (HIV and other immunocompromised patients); and elderly patients due to an altered immune status. Other factors that may be responsible are a delayed diagnosis, especially in elderly patients, incomplete or inadequate therapy, and the emergence of multidrug-resistant tuberculosis. The course of the disease and its corresponding clinicoradiological pattern depends on the interaction between the organism and the host response. Classically, pulmonary tuberculosis has been classified in primary tuberculosis, which occurred previously in children, and postprimary tuberculosis, occurring in adult patients. In industrialized countries, however, there seems to be a shift of primary tuberculosis towards adults. Furthermore, due to an altered immunological response in certain groups, such as immunocompromised and elderly patients, an atypical radioclinical pattern may occur. The changing landscape, in which tuberculosis occurs, as well as the global resurgence, and the changed spectrum of the clinical and radiological presentation, justify a renewed interest of radiologists for the imaging features of pulmonary tuberculosis. This article deals with the usual imaging features of pulmonary tuberculosis as well as the atypical patterns encountered in immunodepressed and elderly patients.

Adult↗
PubMed2000

MR arthrography of the rotator cuff and capsulolabral complex.

MR arthrography of the shoulder has reached maturity in recent years. As opposed to conventional MRI of the shoulder it is less prone to artefacts frequently leading to equivocal interpretation. The spectrum of pathology in which MR arthrography has significant advantages is reviewed, with emphasis on the rotator cuff and the capsulolabral complex.

Joint Capsule↗
PubMedDate not supplied

Imaging of tumours of the foot and ankle.

The general presentation of osseous and soft-tissue neoplasms of the foot and ankle is not different from lesions encountered in other parts of the body and imaging features may be nonspecific. Some lesions, however, have a predilection for the foot and ankle and may have typical imaging features, such as plantar fibromatosis or intraosseous lipoma. This presentation aims to give an overview of bone and soft-tissue tumours of the foot and ankle and to discuss the strength of each imaging modality in the diagnosis.

Ankle↗
PubMedDate not supplied

Ankylosing spondylitis: what remains of the standard radiography anno 2004?

In this review, the radiographic features of ankylosing spondylitis of the axial skeleton will be discussed shortly. Three pathologic processes, including inflammation, bony repair and ossification occurring consecutively or simultaneously, will contribute to the radiographic picture of ankylosing spondylitis. Typical target sites at which these processes take place are the synovial joints, discovertebral joints and ligamentous attachments or entheses of the axial skeleton.

Humans↗
PubMedDate not supplied

Imaging of vascular soft tissue tumors.

Most tumors of the vascular system are benign, cutaneous or subcutaneous lesions that are usually readily diagnosed without significant differential diagnosis. On the other hand, lesions that arise in deep soft tissues have to be differentiated from malignant neoplasms. In these cases, further imaging work-up is necessary for local staging and planning therapy. Vascular lesions of intermediate malignancy and malignant vascular tumors are very rare and demonstrate nonspecific imaging findings. This manuscript aims to give a brief overview of vascular soft-tissue tumors and to discuss the imaging appearances.

Diagnosis, Differential↗
PubMedDate not supplied

Imaging of joint tumors.

The paper gives an overview of the present nosological classification and imaging features of synovial tumors and tumor-like conditions of joints. The merits of each imaging technique will be emphasized.

Diagnosis, Differential↗
PubMedDate not supplied

Proceedings of the European Society of Musculoskeletal Radiology (ESSR) training module, Antwerp, 20-21.01.05. Part two: bone tumors. Benign bone lesions: characteristic imaging features.

Benign bone lesions are a fairly common finding in radiology practice. Often, the combination of patient's age and plain radiographic findings are sufficient for diagnosis and obviates the need for further imaging. Generally the following parameters should be assessed in the evaluation of a bone lesion: clinical features, age of the patient, location, size, pattern of bone destruction, cortical involvement, zone of transition, sclerotic margination and matrix calcification. Cross sectional imaging, such as CT or MRI complements radiography, especially in complex anatomical sites. This article reviews the spectrum of clinical and imaging appearances of the most common benign bone tumors.

Bone Diseases↗
PubMedDate not supplied

Imaging of malignant bonetumors.

Diagnostic imaging plays a pivotal role in the initial detection, characterization, pre-operative assessment and long term follow-up of malignant bone tumors. The purpose of this brief review is to discuss the specific role of the different imaging modalities in the diagnostic work-up of malignant bone tumors. The imaging features, with emphasis on standard radiography, allowing differentiation, of malignant bone tumors, will be highlighted.

Bone Neoplasms↗