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K Wellmann

Publications and source records attributed to K Wellmann.

4 recordsLinked to original sources
PubMed2004

[Malignant gastrointestinal stromal tumor (GIST) of the papilla vateri. A rare tumor entity].

We present the case report of a 68-year-old female patient who had a malignant gastrointestinal stromal tumor of the papilla of Vater. The abdominal CT showed a coin-shaped lesion in the liver (segment VIII). Intraoperative rapid histological examination detected an old parasitic hepatic cyst. To exclude metastasis, we performed duodenopancreatectomy with curative intention. The postoperative course was without complications and neither chemotherapy nor other adjunct treatment was necessary. Because of heterogeneity, the different localization, and in this case the rare localization, surgery of gastrointestinal stromal tumors is difficult. However, we adhered to oncological and therapeutic standards of surgery for papillary carcinoma. This case is discussed based on a review of the literature. However, until now there has been no case report of gastrointestinal stromal tumor of the papilla of Vater in the literature.

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PubMed1998

[Dependence of surgical trauma in aortic interventions on the approach chosen. A prospective study].

Transabdominal aortic replacement is the most widely accepted approach for aortic surgery. Several controlled studies report a more favorable outcome after an extraperitoneal incision, yet there are an equal number of papers with contradictory results. The aim of our study was to assess operative trauma after aortic surgery, depending on whether transperitoneal or extraperitoneal access was used. As a parameter for the extent of the surgical trauma the concentration of Interleukin 6 and acute phase proteins (CRP) was measured pre-, 6 h and 24 h after aortic surgery. One group consisted of 34 patients scheduled for aortic surgery for exclusion of an abdominal aortic aneurysm. The second group consisted of 26 patients who were operated on for aorto-iliac occlusive disease. Each group was subdivided into an equal group of patients operated on either extra- or transperitoneally. In the retroperitoneal aneurysm patients, a posterolateral access was favored, and in patients with occlusive disease an extraperitoneal anterolateral approach was chosen. As a result patients with an extraperitoneal incision and aorto-iliac occlusive disease required less postoperative respiratory support than those operated on transperitoneally. In this subgroup of patients there was a significantly reduced synthesis of Interleukin 6 and CRP. When a retroperitoneal posterolateral approach was required in aneurysm patients, there was no difference between groups. We conclude from our data that only patients with limited infrarenal aortic access can benefit, from the retroperitoneal incision in terms of a reduced immunological reaction.

Acute-Phase Proteins↗
PubMed1997

[Laparoscopy-assisted aortoiliac reconstructions].

Five patients underwent an aortobifemoral bypass using a laparoscope-assisted procedure. With the help of a wall-lifting device, balloon dissection of the retroperitoneum was performed. A total number of five ports were inserted and the aorta was dissected out from the bifurcation to the renal arteries under the guidance of a laparoscopic video camera. A 5-cm incision was required for suturing the proximal anastomosis of the bifurcated graft. Tunneling from the groin to the aorta was performed either video-assisted or with the help of the balloon dissector with a camera inside. All patients could be fully mobilized on the first postoperative day and were discharged after a mean hospital stay of 7.6 days. Mean length of the operation was 250 min. Originally, seven patients were scheduled for the video-assisted procedure. In two cases, we had to change to a conventional technique: in one case because we could not achieve adequate exposure of the aorta in an obese patient using a transperitoneal access, and in the second case owing to extensive adhesions after a bowel resection. Both patients had a regular, uneventful postoperative course. Gasless laparoscopy allowed us to use standard surgical instruments and most importantly a regular aortic clamp, which proved to be beneficial in a heavily calcified aorta. In conclusion, retroperitoneal gasless laparoscopic procedures can be safely performed in infrarenal aortoiliac reconstructions. Further clinical studies are required to prove the usefulness of this new technique.

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