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Biomedical subjects

D Kropej

Publications and source records attributed to D Kropej.

8 recordsLinked to original sources

The management of IIB osteosarcoma. Experience from 1976 to 1985.

From 1976 to 1985, 75 IIB osteosarcomas have been treated out of a total of 98 osteosarcomas at the authors' institution. Because of the effective chemotherapy including high-dose methotrexate administered during this time period, the surgical management changed, and only ten patients out of the 75 IIB osteosarcomas required an amputation. The overall result of 76.7% of disease-free, three-year survival was equally distributed regardless of the surgical procedure. Endoprosthesis, resection with or without grafts, and rotationplasties, as well as amputations, revealed similar results. No negative influence from the limb-sparing surgery could be observed.

Adolescent

[MRT in the follow-up of the healing process of spongy bone transplants--initial experiences].

We present our first experience with MR in bone grafts in 23 patients. Graft implantation followed curettage of benign bone lesions. The locations were, rather exclusively, the long tubular bones. T1-and T2-weighted spin echo-sequences including intravenous application of Gadolinium-DTPA were performed (Magnetom 63, 1,5 T). A total of 29 examinations (1 follow-up control in 6 pat.) was divided into 5 groups, with regard to different stages after surgery, which varied from 1 week to more than 3 years postoperatively. The MR results were related to the respective groups. The results show typical stages of bone graft incorporation, but also greater individual variations in the duration of incorporation. Our first results, however, represent only "snapshots" of different patients at different stages after bone graft surgery. Therefore some important questions are still unanswered but may perhaps be explained with the help of subsequent prospective studies.

Adult

[Significance of transverse forefoot stabilization in the treatment of hallux valgus. Comparative study of clinical/radiologic short-term results].

72 feet of 56 patients were treated by Brandes operation, modified by using a distally attached capsular-periosteal flap from 1984 till 1986 at the Orthopedic Clinic of the University of Vienna. On 41 of these feet an additional cerclage fibreuse according to Lelievre was done. This group had a significantly better correction of the hallux valgus angle with 17 degrees as compared to 8 degrees in the group without cerclage fibreuse. The correction of the intermetatarsal angle was also significantly better with 5 degrees as compared to 1 degree. Only through cerclage fibreuse was it possible to stabilize the sesamoids in the transversal as well as in the longitudinal direction. We found no improvement of subjective well-feeling after the cerclage fibreuse, but a significantly better correction and mobility in the metatarsal-sesamoid joint and the metatarsal-phalangeal joint.

Adult

[The limits of saving the extremity--amputation versus resection].

On the basis of the extensive data contained in the Vienna Bone Tumor Register, i.e. 839 primary malignant bone tumors, as well as of 554 cases treated at the Orthopedic Department of the University of Vienna Medical School, a comparison between the methods of surgery applied at pelvis and extremities during the past two decades can be drawn. Resectional therapy had been performed in twice as much patients as amputation therapy, and barely 20%, mostly with multiple metastases, had been merely treated with palliative surgery or were just biopsied and underwent chemo- and radiotherapy. An analysis of amputations and resections, subdivided into pelvis and sacrum resections, resectional reconstructions and resectional reimplantations at the extremities, shows approximately the same low incidence of local recurrences in the groups amputation versus resection, but a significantly higher involvement of pelvis and sacrum resections as well as no local recurrences in the group of 48 resectional reimplantations. As regards the oncologic radicality of surgical margins, in cases of resections, as compared to amputations, about twice as much inadequate operations had to be accepted, though. The fact that the local recurrences did not increase to the same degree, but were approximately equilibrated, seems to be due to the new chemotherapeutic treatment which had been initiated at the same time as the frequent application of resectional therapy. The conservation of extremities contains twice as high a risk of inadequate operation, but it is, in cases of effective chemotherapy, comparable with the former results of amputations, as regards local recurrences.(ABSTRACT TRUNCATED AT 250 WORDS)

Amputation, Surgical

[Results following spongiosa transplantation in giant cell tumor of bone].

Between 1952-1988 47 giant cell tumors of the bone were treated at the Orthopedic University Clinic of Vienna with different surgical margins: In 9 cases a radical or wide, in 3 cases a marginal and in 35 cases an intralesional resection was performed. In the cases with intralesional resections the tumors were diligently curatted and the resulting bone cavity was shaved with a rase. In addition in eleven cases a chemical cauterization was done with phenol. Afterwards the lesion was filled up with autogenous or homogeneous bone chips with or without fibrin tissucol. In the cases where phenol was used no local recurrence was observed over a mean period of 39 months (max. 91, min. 6) of follow up. Because of the subchondral joint location of the giant cell tumors of the extremities a radical or wide resection usually causes the loss of a part of the joint which is followed by poor functional results. Intralesional resections in combination with phenol cauterization not only achieved good functional results, but also succeeded in reducing the rate of local recurrencies from 25-44% in 0 as described by other authors.

Adolescent

[The incidence of recurrence in phenol treated and non-phenol treated bone cavities following intralesional resection of non-malignant bone tumors].

Between 1955 and 1986 intralesional excisions were performed at Vienna University Orthopedic Clinic on 103 patients suffering from aneurysmatic or juvenile bone cysts, chondromyxoid fibromas or giant cell tumors. In 31 patients phenol was applied to the wall of the bone cavity after this had been carefully curetted or fraised. The chemical cauterization effect is intended to destroy any remaining tumor cell remnants. The cavity is then filled with autologous or homologous spongiosa. In a total of 72 nonphenolized bone cavities there were 21 recurrences (29.1%). By using phenol following intralesional excision of nonmalignant bone tumors in 31 patients the recurrence rate was significantly lowered (3 recurrences - 9.7%).

Adolescent