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W Künzi

Publications and source records attributed to W Künzi.

At least 19 recordsLinked to original sources
PubMed2006

["True neurologic thoracic outlet syndrome" -- anatomical features and electrophysiological long-term follow-up of lateral thenar atrophy].

Atrophies of the intrinsic muscles of the hand are considered to be a typical symptom of the "true neurologic" form of thoracic outlet syndrome (TOS). The classical form of this entity was described as early as 1970, consisting of a cervical rib or a prolonged transverse process of C7, complete with a fibrous band to the first thoracic rib, resulting in atrophy of the intrinsic muscles of the hand. All our TOS patients presenting with such atrophy displayed anatomical findings consistent with this definition. Based on this observation, the TOS classification currently in clinical use, which differentiates between "disputed" and "true neurologic" subgroups of the neurologic form, is reviewed. In all cases of "true neurologic TOS" with atrophy of the intrinsic muscles of the hand, the lateral thenar muscles are affected first. We present the electrophysiological long-term results of such thenar atrophies of seven patients with eight operated extremities after brachial plexus decompression. The amplitude of the neurographically measured potential over the opponens pollicis and the abductor pollicis brevis muscle, respectively, was defined as quantitative parameter for muscles atrophy. Neither distinct reinnervation nor progressive denervation was evident in any of the cases after a follow-up period, on average, of more than five years post surgery. These findings are in conflict with clinical observations reporting a major postoperative improvement of the motor deficits.

Adolescent↗
PubMed2005

Lyell syndrome revisited: analysis of 18 cases of severe bullous skin disease in a burns unit.

Over the last few years, understanding of the pathophysiology of toxic epidermal necrolysis (TEN), or Lyell's disease, has substantially increased. However, differentiation of severe bullous skin disease remains a challenge for the clinician, and one that is often complicated by late patient referral. We performed a retrospective analysis of all patients with severe bullous skin disease, admitted between 1997 and 2002 to the Burn Centre, which is an integrated part of the Division for Plastic, Hand- and Reconstructive Surgery at the University Hospital of Zurich, Switzerland. We present an overview of our strategies and of the diagnostic and therapeutic difficulties encountered. The final diagnoses of the 18 patients referred to the unit were as follows: eight cases of TEN, one case of staphylococcal scalded-skin syndrome (SSSS), two cases of generalised drug eruption, one case of acute generalised exanthematic pustulosis and one case of febrile ulceronecrotic pityriasis lichenoides et varioliformis acuta (PLEVA). In two cases, the diagnosis remained unclear. In three cases, paraneoplastic origins were suspected but not demonstrated. The overall mortality rate was 33% (six of 18 patients). Remarkably, all patients with histologically confirmed TEN survived. Six of these patients were successfully treated with intravenous immunoglobulins (IVIG). The most common single causative drug inducing TEN (four cases out of eight) was Phenytoin. Establishing an accurate diagnosis-based on a skin biopsy, harvested at an early stage-is more important than ever, because more specific and effective therapeutic modalities are available. As these potentially life-threatening bullous skin disorders are rare, we recommend, that care be provided by an experienced interdisciplinary team, comprising a dermatologist, or dermatopathologist, an intensive care specialist and a plastic surgeon.

Acute Disease↗
PubMed2004

Laparoscopic technique for secondary vaginoplasty in male to female transsexuals using a modified vascularized pedicled sigmoid.

Between 1995 and 2002, 53 primary sex reassignments in male to female transsexuals were performed at our division. The objective of this procedure is to mimic the female external and part of the internal genitalia both esthetically and functionally. In 11 of the 53 patients, a secondary vaginal lengthening had to be performed due to a short neovagina. This was achieved using a pedicled sigmoid segment, with an open approach in the first 2 patients and using a laparoscopic method in the following 9. This paper focuses on the laparoscopic technique, its benefits and potential complications. Where a primary vaginoplasty, combining inversion of the penile and scrotal skin flaps, yields unsatisfactory functional results, a secondary vaginoplasty using the pedicled sigmoid represents an elegant means to achieve functional improvement. Furthermore, we report a modified surgical approach to the conventional sigmoid transition.

Adult↗
PubMed2004

[Breast implant and desmoid tumor: is there an etiological relation?].

Desmoid tumor of the breast is a rare lesion. So far only 8 cases in which the tumor origin was linked to a breast implant have been published. Whether there is an etiological relation to the silicone implant or if it is pure coincidence is not evident at this time. We present the case of a 24-year-old female with congenital asymmetric breasts who underwent breast augmentation in our division on the left side and 15 months later had a breast reduction on the other side. Nine years after the first operation we found a suspicious lesion on the side of the breast implant. The histological result of the excisional biopsy showed an aggressive fibromatosis "arising from" the capsule around the silicon implant. We discuss the possible association of breast implant and desmoid tumor of the breast and evaluate the diagnostic and therapeutic options for desmoid tumors of the breast.

Adult↗
PubMed2004

[Reconstruction of posttraumatic bony defects of the lower extremity: callotaxis or free vascularized fibula graft?].

PURPOSE/BACKGROUND: Several methods have been established for the treatment of bony defects of the lower extremity. The purpose of this paper is to evaluate the use of a free vascularized fibula graft for these defects in comparison to callotaxis and segmental transport. METHOD AND CLINICAL MATERIAL: Retrospective analysis of data from 32 patients treated between 1981 and 1999 at the University Hospital in Zurich, Switzerland with bony defects of the lower extremity. RESULTS: The reconstruction of the bony defect was successful in 80 % with fibula graft, in 94 % with callotaxis and in 83 % with segmental transport. In the group with the fibula transplantation 2.6 re-interventions due to complications had to be performed, in the callotaxis group there were 3.6 and in the segmental transport group 5.2 surgical re-interventions. The time between primary intervention and full weight bearing was 16 months in the fibula transplantation group, 7.6 months in the callotaxis group and 10.7 months in the segmental transport group. CONCLUSION: The results show that these three options can be used for different indications. Reconstruction can be planned according to the following rules: Segmental bony defects of the entire circumference of up to 5 cm are best treated by initial shortening followed by callus distraction. Bony defects from 5 to 12 cm are best treated by segmental transport while maintaining limb length. Defects > 12 cm are best treated by reconstruction with a vascularized free fibula graft.

Accidents, Traffic↗
PubMed2004

Baseline staging in cutaneous malignant melanoma.

BACKGROUND: Baseline staging in patients with primary cutaneous malignant melanoma (MM) is routine, but the diagnostic accuracy and the impact on clinical outcome are still unclear. OBJECTIVES: To evaluate the sensitivity and specificity of baseline staging in the early detection of regional lymph node metastases or distant metastases in patients with MM. METHODS: One hundred consecutive patients with MM of Breslow's tumour thickness over 1.0 mm were enrolled. All patients had an extensive baseline staging including physical examination, ultrasound (US) of the abdomen and regional lymph nodes, chest X-ray, whole-body positron emission tomography (PET) and sentinel lymph node biopsy. The sensitivity and specificity of detection of macroscopic or microscopic metastases in the regional lymph nodes or at distant sites were calculated for each method. RESULTS: Sentinel lymph node biopsy was positive in 26 patients. US detected two of 26 histologically tumour-positive sentinel nodes (sensitivity 8%, specificity 88%) and PET two of 26 (sensitivity 8%; specificity 100%). There were three lymph node metastases with a diameter > 4 mm. All of them were found suspect at physical examination. Two of them were detectable with US, two with PET, and all were identified with either US or PET. Nine patients had suspect findings at distant sites, which were all false positive on further investigation (specificity of the combined staging procedures 91%). At 18 (6-37) months' follow-up, five of 26 (19%) patients with a positive sentinel node and four of 74 (5%) of patients with a negative sentinel node had recurrent or progressive disease. CONCLUSIONS: The combination of physical examination and lymph node US detects the great majority of patients with macroscopic lymph node metastasis (approximately 3% of patients at baseline). Only 10% of patients who have a histologically tumour-positive sentinel node are macroscopically detectable. Altogether, approximately 25% of patients have a positive sentinel node biopsy, among 90% microscopic. The value of whole body staging at baseline remains limited, since distant metastases can hardly ever be detected. The survival benefit of baseline staging and surveillance in patients with cutaneous MM remains to be established by comparative prospective trials.

Abdomen↗
PubMed2003

[Radioscapholunate fusion: long-term results].

INTRODUCTION: A review of the literature on long-term results (> or = 10 years) following radiocarpal arthrodesis as recommended by Gordon and King shows a paucity of data. Regarding the suitability of this procedure for treating radiocarpal arthrosis, especially in younger patients, we collected and evaluated long-term results of this surgical procedure. MATERIALS AND METHODS: Five patients (four men, one woman), who were treated between 1978 and 1984 at our institution with a partial radiocarpal arthrodesis as described by Gordon and King were reexamined clinically and radiologically by the same examiner in the year 1990 and again in the year 2000. RESULTS: All five patients were very satisfied with the result of the operation. Two patients were completely free of pain, whereas the other three patients reported minor pain in the radiocarpal joint when applying strain. The active range of motion in the operated joint remained constant over the years (mean 60 degrees dorsopalmar, 30 degrees ulnoradial, 162 degrees pro-/supination). Conventional radiological imaging showed proper osseous consolidation in the areas of partial arthrodesis, and slight degenerative intercarpal alterations in the distal radioulnar joint were observed. Complete postprocedural reintegration into the workforce, including manually demanding work, was achieved. CONCLUSIONS: The results of the follow-up examinations of these five patients indicate that satisfying long-term results can be achieved after radiocarpal arthrodesis provided that the procedure is correctly indicated and the operation is conducted in a technically proper manner. This method of radiocarpal arthrodesis is likely also appropriate for young manual labourers suffering from painful radiocarpal arthrosis after distal intraarticular fracture of the radius, scaphoid non-union, scapholunar dissociation and Kienbock's disease.

Adult↗
PubMed2002

[Necrotising fasciitis caused by streptococcal toxic shock syndrome].

Between 1994 and 1997, sixteen patients suffering from necrotising soft tissue infection were treated at the burn centre of the Division of Reconstructive Surgery, University of Zurich. The case of a 47 year old man is presented: He suffered from a necrotising fasciitis caused by Streptococcal induced Toxic Shock Syndrome (STSS). This example emphasizes the necessity of early diagnosis, priority of surgical intervention, and the antibiotic strategy. Necrotising fasciitis is a serious disease, caused by a variety of bacteria, which shows a high mortality rate, and its frequency was increasing over the last years.

Adult↗
PubMed2001

[Fecal incontinence: therapy of congenital sphincter dysplasia in adulthood--a case report].

The dynamic graciloplasty has gained acceptance in the therapy of intractable fecal incontinence. With a success-rate of 60 to 80%, the dynamic graciloplasty is a good alternative towards a permanent colostomy for individual cases. Furthermore, adults suffering from congenital anal atresia may be well treated by this therapy as described in this case. Following surgery, an accurate follow-up is inevitable in these patients, including training of neosphincter control. After 8 to 12 weeks the training-process of the neosphincter-control should be finished. At this point of time the patient will have obtained defecation-control and should be able to execute voluntary defecations.

Adult↗
PubMed2001

Clustered microcalcification following breast implant removal mimicking malignancy.

On mammography, clustered microcalcification can be an early and sensitive sign of malignancy, although it is also commonly seen in benign alterations of the breast. We report on a 52-year-old woman with mammographically suspicious granular calcification as a late result of a short-term silicone augmentation. Plain film, surgical, and histopathological features are demonstrated.

Breast Diseases↗
PubMed2001

[Compression syndrome of the arteria circumflexa humeri posterior in a volleyball player].

The compression syndrome of the posterior circumflex humeral artery is an infrequent vascular compression syndrome and differential diagnosis of the thoracic outlet- and the hypothenar-hammer-syndrome. The diagnosis includes a complete interview and a transfemoral armarteriography. Our report is about an affected volleyball player, the possible pathomechanism that can lead to this syndrome and the current literature.

Adult↗
PubMed2000

Artificial skin, split-thickness autograft and cultured autologous keratinocytes combined to treat a severe burn injury of 93% of TBSA.

Despite refinements in burn shock resuscitation, improvements in surgical techniques, advances in intensive care medicine and the presence of very expert surgeons, the treatement of patients with severe burns exceeding 60% TBSA remains a big challenge. A major problem in the treatment of severe burn injuries is the lack of autologous skin. In selected cases cultured epidermal autograft (CEA) may be used. However, they are available only 2-3 weeks after biopsy, thus requiring a temporary wound closure after necrosectomy. A new option is Integra(TM), an artificial skin consisting of a bilayer membrane system. The three-dimensional porous matrix from bovine tendon collagen and a glycosaminoglycan layer is covered by a silicon sheet. The latter prevents fluid loss from the wounds and serves as a barrier against germ invasion. After adequate vascularisation of the dermal template, the silicon layer is removed and replaced by a thin autograft. We present a 26-year old male who sustained a 93% TBSA burn injury (60% full-thickness burn, 33% partial-thickness burn). He was treated with artificial skin, split-thickness autograft and CEA in combination. The clinical history and the follow-up of approx. 1 year are presented and the results discussed. We consider the survival of this patient being a result of the therapeutic progress of the recent decades.

Adult↗
PubMed1999

Care of burns victims in Europe.

There is no detailed information about the care of burns victims, in Europe, in the case of a fire disaster. Several countries have discussed how to treat burn victims, but only a little is known of their capacity to offer space to other countries in the event of a fire disaster outside the country in question. In Europe, most countries are dependent on England, France and Germany in such cases. Since "Los Alfaques", "Ramstein" and other examples of such disasters, we know how important it is to focus more on burn victims in Europe with respect to national and international cooperation.

Adult↗
PubMed1998

MR imaging of the augmented breast.

Mammographic evaluation of the augmented breast is challenging, since breast implants obscure significant amount of breast tissue while diminishing the effect of compression. Posttherapeutic scarring can make mammographic interpretation even more difficult. MRI has thus evolved into the modality of choice for diagnosing implant complications as well as detection of primary or recurrent breast cancer in these patient population. The present article attempts to give an overview of the MR findings of different breast augmentation and reconstruction techniques, i. e. prosthetic breast implants, breast reconstruction with autogenous tissue, free silicone injections and fat grafts, and their complications.

Adipose Tissue↗
PubMed1992

[Differences of acute and chronic epidural hematoma].

Standard neurosurgical management demands prompt evacuation of all extradural hematomas to obtain a low incidence of mortality and morbidity. In selected cases some authors have suggested that moderate hematomas can be managed conservatively without risk to the patient and with a normal outcome. The goal of this study was to analyze the differences in preoperative clinical parameters between a group of acute and a group of chronic extradural hematomas (chronic extradural hematoma was defined as a delay of more than 72 h from the accident to diagnosis). One hundred fifteen (115) patients with extradural hematomas underwent a standard evaluation, documentation and neurosurgical management (prompt evacuation of all extradural hematomas through a craniotomy). Ninety-five patients (83%) had an acute extradural hematoma. Twenty patients (17%) had a chronic extradural hematoma. We analyzed the following parameters: age, cause of accident, clinical findings, Glasgow Coma Score, morphology of hematoma, location of hematoma, cause of bleeding and clinical outcome. The mean age (chronic 30/acute 32) and age distribution were not significantly different between groups. There were no differences in the cause of accident. All patients in both groups had skull fractures. There was no difference between groups regarding hematoma location, most of there being located in the temporal fossa. In the group of acute extradural hematomas, 62% of patients had a Glasgow Coma Score of less than 8 and 47% had pupillary dilation. In the group of chronic extradural hematomas, moderate clinical symptoms were found, with headache and discrete psychological changes most common. Eighty percent (80%) of the patients had a Glasgow Coma Score of greater than 13 and no patients had pupillary dilation.(ABSTRACT TRUNCATED AT 250 WORDS)

Acute Disease↗
PubMed1992

[Who should be hospitalized following mild craniocerebral trauma?].

The frequency of minor closed head injuries is high. These injuries may be complicated by the development of life-threatening intracranial hematomas. A well-defined selection criteria for admission must be proposed to guarantee an efficacious observation. In our series of 489 hospitalized patients with a GCS of 15 when seen in the emergency room: 4 patients required evacuation of an intracranial hematoma, 11 revision of a depressed skull fracture or a compound fracture of base of the anterior fossa. Using the existence of a skull fracture as a selection for admission, a strategy proposed by Jennett and colleagues, it would have been possible to reduce the number of patients hospitalized by 70% without missing a patient who developed an intracranial hematoma. Following these criteria no intracranial hematoma would be missed in our patients with a GCS of 15. We suggest that the use of plain x-rays to identify skull fractures and subsequent hospitalization prevents missing an intracranial hematoma. Those patients with diminished levels of consciousness of focal neurologic deficits require admission irrespective of skull fractures.

Adult↗