PubMed Health⌕ Search

Biomedical subjects

M H Bohrer

Publications and source records attributed to M H Bohrer.

At least 19 recordsLinked to original sources
PubMed2006

[Space-occupying lesion of the pancreas--how frequently not due to a suspected ductal adenocarcinoma?].

In patients with a space-occupying lesion of the pancreas at first a primary ductal adenocarcinoma is considered as the cause. Other tumours or metastases are assumed to occur very rarely. Therapy and prognosis of other pancreas tumours differ from therapy and prognosis of a primary ductal adenocarcinoma. We therefore examined the question of how frequently a space-occupying lesion of the pancreas was not due to a ductal adenocarcinoma in our case materials. Retrospectively 70 patients who had undergone a percutaneous puncture of a space-occupying mass of the pancreas under ultrasonographic control were included in the study (34 women, 36 men). In 62 patients a clear histological diagnosis was possible on the basis of the biopsy. In 53 cases (76 %) a primary adenocarcinoma of the pancreas could be diagnosed. In 5 patients (7 %) these masses turned out to be metastases of a previously known malignant tumour disease (2 x mammary carcinoma, 2 x gastric carcinoma, 1 x sigmoid carcinoma). Other tumours could be detected in 4 cases (6 %) including a tuberculoma, an endocrine tumour, a fusocellular sarcoma with partial neurogenic differentiation and a large-cell and pleomorphic-cell anaplastic, partly sarcomatoid carcinoma. In patients with a space-occupying lesion of the pancreas, tumours other than a ductal adenocarcinoma are not rare. In particular, in cases of a previously known malignant tumour disease a space-occupying lesion of the pancreas can also turn out to be a metastasis. Every other individual tumour entity is rare. Other tumour entities at large, however, are found in daily routine. The preoperative biopsy of space-occupying lesions of the pancreas, therefore, still has a clinical importance for the further therapy planning.

Aged↗
PubMed2005

Does Cytokeratin7/20 immunoreactivity help to distinguish Barrett's esophagus from gastric intestinal metaplasia? Results of a prospective study of 75 patients.

Barrett's esophagus is a recognized risk factor for the development of esophageal dysplasia and carcinoma. Unfortunately, gastric incomplete intestinal metaplasia arising in Short Segment Barrett's esophagus can be indistinguishable histologically on hematoxylin/eosin stains. Distinct patterns of CK 7 and CK 20 immunohistochemical expression have been demonstrated to be both highly sensitive and specific for Barrett's esophagus, but have not been found in gastric metaplasia. The aim of our study was to test whether immunostaining with CK 7/20 helps to distinguish between Barrett's epithelium and gastric incomplete metaplasia. Cases of long segment Barrett's esophagus, short segment Barrett's esophagus, and cases with a normal gastroesophageal junction, as well as specimens with gastric antral intestninal metaplasia, were examined: three patterns were defined. Barrett's pattern (superficial CK 20 staining; superficial and crypt CK 7 staining); gastric pattern (superficial and crypt staining of both markers); other patterns (different from Barrett and gastric types). Seventy-five patients were enrolled in this study, 26 with long segment Barrett's esophagus, 21 with short segment esophagus, 13 with intestinal metaplasia of the cardia, and 18 with antral intestinal metaplasia. The Barrett pattern showed a high specificity of 97%, but a sensitivity of only 30% in patients with short segment Barrett esophagus. Our results do not confirm the hypothesis that CK 7/20 immunostaining can be used for a reliable differentiation between incomplete intestinal metaplasia and Barrett's epithelium.

Adult↗
PubMed2005

[The diagnosis of liver cirrhosis: a comparative evaluation of standard laparoscopy, mini-laparoscopy and histology].

BACKGROUND: The superiority of laparoscopy with guided biopsy over biopsy alone is established. It is still uncertain if this is also true for midi-/ and mini-laparoscopy. AIM: The aim of this study was to determine the diagnostic gain of laparoscopic-guided biopsy for standard laparoscopy and the use of midi-/mini-laparoscopies. Characteristics of the liver biopsies were investigated with regard to a missed diagnosis of cirrhosis. METHODS: In a consecutive series of 425 patients clinical, laparoscopic and histological findings were investigated. The length and fragmentation of the liver biopsies were investigated with regard to a missed diagnosis of cirrhosis. RESULTS: The sensitivity of laparoscopy in the diagnosis of cirrhosis was 96 %, that of histology 68 %. The sensitivity of histology alone was especially low in macronodular cirrhosis. The sensitivity of both laparoscopy and histology improved from Child A to C. When cirrhosis was apparent, liver biopsies were shorter and more frequently fragmented. However, the diagnosis of cirrhosis was independent of these parameters. CONCLUSION: Mini-laparoscopy may replace standard laparoscopy and appears to be superior compared with histology alone.

Adolescent↗
PubMed2004

[Heavy diarrhea by low malignant B cell lymphoma].

A 52-year old female presented with a low, malignant centroblastic-centrocytic lymphoma. After splenectomy and under steroid therapy it came to the eruption of a latent Strongyloides stercoralis infection, which the patient had presumably been suffering from for several years. Due to the immunodeficient condition and under continued steroid therapy even three courses of high dose anthelmintic therapy could not eradicate the parasites. The patient died of fulminant sepsis.

Animals↗
PubMed2002

[Endometriosis of the transverse colon--a rare localization].

HISTORY: A 65-year-old woman with no complaints came to our hospital for a colonoscopy because of a family history of a colorectal carcinoma. Because of postmenopausal complaints she had been undergoing estrogen therapy for the past five years. INVESTIGATIONS: Colonoscopy revealed a 2 x 2 cm polyp like structure with central tissue proliferation in the transverse colon. Neither chromoendoscopy with indigocarmine nor multiple biopsies indicated an adenomatous glandular proliferation. Miniendosonography revealed the image of a tumour located in the muscularis propria. DIAGNOSIS AND CLINICAL COURSE: As a malign process could not definitely be excluded, a colon segment resection was carried out by laparoscopy. In the operative specimen there was a 2 x 2 cm large tumour growing under the mucosa. Histologically it was an intramural manifestation of an extragenital endometriosis in the area of the muscularis propria with resulting nodular proliferation of the local muscle system. The ectopic endometrial glands in the area of the endometriosis revealed a complex hyperplasia without atypical features, an image suggesting oestrogen stimulation. CONCLUSION: In many cases the diagnosis of an intestinal endometriosis can not be made through a non-invasive diagnostic method such as colonoscopy with biopsy because of the intramural localisation in the muscularis propria. In order to safely rule out a malignant lesion, in unclear cases a resection should be aimed at.

Adenomatous Polyposis Coli↗
PubMed2002

[The hyperplastic gastric polyp - a praecancerosis?].

In general, hyperplastic polyps of the stomach are regarded as benign lesions. Still there is the chance to find carcinomas within them as documented in this case report. This finding can be interpreted as an incidental appearance. At the moment there are no standardized guidelines regarding diagnostics and therapy of gastric hyperplastic polyps. Referring to a short review of the literature endoscopic snare polypectomy seems to be a reasonable therapeutic option of hyperplastic polyps with a size of 0.5-1 cm. Although it is possible to determine the histology by forceps biopsy, it is possible to be misled by missing areas of focal carcinomas. Complications after polypectomy are rare and often no further intervention is needed. A further point for polypectomy is the fact that surfaces of hyperplastic polyps are eroded in about 90 % and therefore there is the risk of bleeding, chronic anaemia and positive stool tests for occult blood.

Adenocarcinoma↗
PubMed2001

[Phenprocoumon-induced necrotizing hepatitis].

CLINICAL PRESENTATION: A 52-year-old female patient presented at our hospital with right upper abdominal pain and impaired general condition. During the previous 7 months, the patient had received anticoagulation treatment with phenprocoumon due to a prosthetic aortic valve replacement. TESTS: Serological tests for virologic, autoimmune or metabolic causes of hepatitis were negative. The histologic examination of liver biopsies showed necrotizing hepatocellular injury in zone 3 of the acinus without relevant fibrosis. Initially, a lymphocyte transformation test with phenprocoumon was negative. A second test after one week turned out to be positive. DIAGNOSIS AND CLINICAL COURSE: After withdrawal from phenprocoumon therapy and switching to anticoagulation with a low molecular weight heparin, liver tests gradually became normal. Aminotransferase levels rapidly increased when phenprocoumon treatment was resumed. Phenprocoumon-associated necrotizing hepatitis was diagnosed by clinical course, liver histology and the positive lymphocyte transformation test. After immunosuppressive treatment with prednisolone was started again, liver enzymes gradually normalized. Anticoagulation was further performed with low molecular weight heparin. CONCLUSION: This case stresses the fact that an adequate and detailed history on concomitant medication is mandatory in patients who present with cryptic hepatitis. Though severe hepatic adverse effects of phenprocoumon are rare, physicians should consider coumarin derivatives as a potential source of hepatitis.

Anti-Inflammatory Agents↗
PubMed2001

[DNA cytometric studies of Barrett mucosa].

BACKGROUND: Barrett's esophagus predisposes to cancer development. The diagnosis of dysplastic precursor lesions is impaired by problems of subjectivity. In the present study, DNA ploidy results of patients with Barrett's esophagus were related to the grade of dysplasia and to the progress of the disease. PATIENTS AND METHODS: In 61 patients with Barrett's esophagus, DNA ploidy was determined by image cytometry on imprints. All biopsies (n = 145) were histologically examined for dysplasia distinguishing between low- and high-grade dysplasia, and dysplasia-negative. RESULTS: A significant correlation (p < 0.001) between DNA ploidy and the grade of dysplasia was found, with 81% euploid DNA results in biopsies negative for dysplasia and 86% abnormal DNA patterns in biopsies with high-grade dysplasia. The subgroup of low-grade dysplasia showed a heterogeneous DNA ploidy. It is important to note that nearly 20% of biopsies classified dysplasia-negative contained abnormal single cells or abnormal stemlines regarding DNA content. In several cases, suspect DNA results caused a modified reclassification of dysplasia, and there were cases in which patients negative for dysplasia but positive for abnormal DNA ploidy developed dysplasia later on. CONCLUSION: In patients with Barrett's esophagus, DNA ploidy by image cytometry is a suitable additive method for histological evaluation of dysplasia. It seems to be helpful in identifying patients at risk, perhaps before the development of clear dysplasia.

Aneuploidy↗
PubMed2000

Correlation between neovascularisation and neuroendocrine differentiation in prostatic carcinoma.

Neuroendocrine (NE) differentiated tumor cells are found in almost all prostatic carcinomas. Prostatic carcinomas with a high NE differentiation have a poor prognosis and increased metastatic potential. A relationship between the neovascularisation density in the tumor and the metastatic potential in prostatic carcinoma is well known. NE cells and microvessels were demonstrated immunohistochemically on 102 radical prostatectomy specimens using antibodies against Chromogranin A and CD34. Standard areas (7.9 mm2) of maximal Chromogranin A expression and highest vascularisation were determined and topographically related by light microscopy. Area density of microvessels was evaluated morphometrically. NE tumor cells were present in all prostatic carcinomas studied. High grade prostatic carcinomas expressed significantly more NE tumor cells and exhibited a higher neovascularisation than low grade carcinomas. There was significantly higher neovascularisation in high grade tumors with many, as compared to high grade tumors with few, NE tumor cells. Poorer pathological staging correlated with increased neovascularisation and stronger NE differentiation. A topographical relationship between the area of maximal NE tumor cells and the area of highest neovascularisation was found in 80.4% of all cases. An analysis of variance revealed a large number of NE tumor cells as the only predictor of an increased neovascularisation (p = 0.0006). These observations support the concept that increased neovascularisation is influenced not only by poor pathological grading but also by a high NE differentiation.

Adenocarcinoma↗
PubMed1999

[A rare cause of iron deficiency anemia: recurrent hemorrhage from a carcinoid of the jejunum--diagnosis and therapy with enteroscopy].

We report a 66-year-old patient with previously diagnosed iron deficiency anemia. He complained of fatigue, but had no further symptoms. Hemoglobin was 9.1 g/dl. Test for occult blood in stool was positive, but gastroduodenoscopy and colonoscopy revealed no bleeding source. The man was referred to our department for push-type enteroscopy. By enteroscopy we diagnosed a pedunculated, large polyp in the upper jejunum. The polyp seemed to be submucosal, but had some ulcerations on its surface as the probable bleeding source. In the lower parts of the small intestine no further polyps were detected. After endoscopic doppler examination we injected adrenaline into the base of the polyp to prevent bleeding and the polyp was removed by snare without complications. The polyp was diagnosed to be a carcinoid and was removed in sano.

Aged↗
PubMed1997

[Remnants of the Mullerian duct. Case report based on a complex urogenital abnormality].

Persistent remnants of the caudal müllerian ducts can manifest in several forms and are often associated with other urogenital disorders, especially hypospadias. Inadequate activity of the müllerian inhibiting factor, in addition to fetal testosterone deficiency, is responsible for this syndrome. The etiology, diagnosis and management of müllerian duct remnants are discussed. A complex case of penile-scrotal hypospadia, hypoplastic prostate gland, testicular ectopia and retrovesical cyst is presented.

Adult↗
PubMed1994

[Fatal subileus caused by intestinal amyloidosis in light chain plasmacytoma].

This report concerns a patient with systemic amyloidosis due to a plasmocytoma, in whom massive amyloid depositions in the small bowel caused severe diarrhoea and malabsorption. The excessive amyloid depositions in the lamina muscularis propria of the bowel finally resulted in therapy-resistant motility disturbance and adynamic subileus with fatal outcome.

Amyloidosis↗
PubMed1993

[Computerized tomography-guided fine needle biopsy. Current perspectives in biopsy diagnosis].

253 cutting needle biopsies from 240 patients (151 men, 89 women; mean age 68 [23-84] years) were reviewed. The biopsies were taken under computed (CT) tomography guidance from various parts of the body (pancreas: n = 48, liver: n = 32, other upper abdominal organs: n = 5, mediastinum: n = 27, lung: n = 37, kidney: n = 13, adrenals: n = 8, retroperitoneum: n = 35, pelvis: n = 37, pleura: n = 4, chest wall: n = 6). The data were evaluated retrospectively. In 86% of cases meaningful clinical information was obtained in the form of a definite diagnosis (74%) or of a presumptive or differential diagnosis (12%). As a rule it was possible to assess the degree of malignancy and to ascertain the exact nature of the condition; the latter was true not only of malignant but also of benign lesions. In the majority of cases this had important implications. In just under 14% of all cases the target area was missed and no diagnosis could be made. To raise the chances of obtaining a representative biopsy multiple punctures were performed in 44% of the CT-guided biopsies. In 61 cases (24%) the diagnosis was checked against further tissue samples and in four cases the diagnosis based on needle biopsy material had to be revised. In all, only two complications were recorded; both were mild and did not require treatment. In terms of diagnostic value, CT-guided fine needle biopsies proved considerably superior to conventional cytological studies of fine needle aspiration material.

Adult↗
PubMed1993

[Immunohistochemical and morphometric studies on neuroendocrine differentiation of prostate carcinomas].

102 unselected and untreated prostate carcinomas were immunohistochemically analysed with regard to neuroendocrine (ne) differentiation using a monoclonal antibody against Chromogranin A. Density of ne-tumor cells/mm2 tumor area and arrangement of ne-tumor cells (single cells; small groups and large groups) were determined. We found ne-tumor cells in 90% of all carcinomas (n = 92). 70% had a low density of ne-tumor cells (< or = 1 cell/mm2). 67% of carcinomas with ne-differentiation showed only single ne-tumor cells, there were small groups in 19% and large groups in 14%. There was an association between higher densities of ne-tumor cells and arrangement in groups. In high malignancy carcinomas we found a higher density of ne-tumor cells and more often an arrangement in groups than in low grade tumors. Our results support reports in literature that ne-differentiation is of prognostic significance.

Antibodies, Monoclonal↗