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Biomedical subjects

P Wuismann

Publications and source records attributed to P Wuismann.

5 recordsLinked to original sources
PubMed1994

Reconstructive vascular surgery in rotationplasty for malignant tumors of the femur.

The rotationplasty procedure of the femur, as first described by Borrgreve, is the functional improvement of an abnormally shortened lower limb. In the last 15 years this procedure has been used in its original form and as modification for tumors of the femur and proximal tibia. The reconstruction of the femoral vessels as an important part of the operation has not enough been accentuated. Principally two types of reconstructions can be performed: the vessels are dissected in the adductor canal or a segmental resection and reanastomosis are performed. Between January 1990 and April 1993 classical and modified rotationplasties were performed for malignant tumors in 34 patients in our institution. In all cases a segmental femoral vessel resection with end-to-end anastomosis were performed. No intra- and postoperative vascular related complications occurred. The authors emphasize the advantage of this method: reanastomosing resected femoral vessels by experienced vascular surgeons is a save, time-saving method. In addition, the radicality of the operation increases in order to obtain excellent long term results.

Adolescent↗
PubMed1989

[The x-ray morphology of chondromyxoid fibroma].

29 cases of chondromyxoid fibroma (CMF) from the material submitted to the Bone Tumour Register in Münster were reviewed. The tumour was observed most frequently in the second and third decades of life, with a slight female preponderance in our series. The diaphyseal and metaphyseal regions of the lower limb were most commonly affected, with a particular predisposition for the knee. The lesions were located eccentrically in 71% showed cortical expansion in 72%, and pseudotrabeculation in 51% of cases. The lytic patterns were classified as Lodwick IA in 35%, as Lodwick IB in 45%, as Lodwick IC in 17% and as Lodwick II in 3% of cases. Due to the absence of characteristic radiographic features, the differential diagnosis from aneurysmal bone cyst, giant cell tumours and non-ossifying fibroma is often difficult. Radiographic findings would however indicate benignity and, therefore, help to differentiate the lesion from chondrosarcoma, to which it bears strong histological similarity.

Adolescent↗
PubMed1988

[Computerized tomography and magnetic resonance tomography in soft tissue tumors].

The modern cross-sectional imaging techniques, e.g. CT and MR, have brought about a significant improvement in the diagnosis of soft tissue tumors. CT allows these neoplasms to be detected with relatively high sensitivity and their extension to be assessed. MR has proved to be superior to CT owing to the high soft tissue contrast it provides and its multi-planar imaging capabilities. Gadolinium-DTPA, a paramagnetic agent, can be utilized to good advantage as contrast material in MR; it yields further information as to the malignancy or otherwise of particular tumors. In addition, differentiation of tumor recurrences from other postoperative alterations seems to be feasible.

Humans↗
PubMed1987

[Primary bone tumors and tumor-like lesions of the spine. The accuracy of radiological assessment criteria].

In 79 primary bone tumors and tumorlike lesions of the spine radiological criteria are analyzed, which allow to assess the biological nature. Criteria associated with benign lesions, are: regular, trabecular matrix, osteoplastic matrix, exostotic growth, location in the posterior elements, absent soft tissue mass, and bulging of the vertebra. Criteria suggestive of malignancy are: Soft tissue mass, location inside the vertebral body, no alteration of the vertebral shape, compression fracture, and osteolysis. Benign lesions can be diagnosed with a higher degree of reliability than malignant tumors. Diagnostic accuracy increases in lesions exhibiting more than one criterion of the same group.

Chondroma↗