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At least 163 records · Page 9Linked to original sources
PubMed2002

Inflammatory pseudotumor of the mesentery causing portal venous thrombosis and cavernomatous transformation.

A 32-year-old man was admitted to our hospital complaining of abdominal pain in the left upper quadrant. A mass was palpable on the left side of the umbilicus. Laboratory data revealed anemia, elevated erythrocyte sedimentation rate, hypergammaglobulinemia, and prolonged prothrombin time. Computed tomography demonstrated a soft tissue mass in the mesentery of the jejunum, portal venous thrombosis, and cavernomatous transformation in the porta hepatis. The patient was eventually diagnosed by laparoscopic partial resection as having inflammatory pseudotumor of the mesentery. Four months later, all of his symptoms and abnormal laboratory findings completely disappeared without any therapy. Inflammatory pseudotumor should be kept in mind as a cause of portal venous thrombosis, and/or cavernomatous transformation although it is rare.

Adult↗
PubMed1993

A closed chamber for intravital microscopy of the rat mesentery under controlled oxygen tension and temperature.

An airtight and watertight closed chamber for intravital microscopy of the rat mesentery was developed. It incorporates an oxygen microelectrode and a thermistor for monitoring the local environment around the mesentery, as well as a heater for controlling the chamber temperature. This chamber provides an alternative to the superfusion method for intravital microscopy of the mesenteric microcirculation under circumstances where well-defined experimental conditions are required.

Animals↗
PubMed2004

Primary gastrointestinal stromal tumors in the omentum and mesentery: CT findings and pathologic correlations.

OBJECTIVE: This study was undertaken to describe the CT features of primary gastrointestinal stromal tumors in the omentum and mesentery and to identify any pathologic correlation. CONCLUSION: On contrast-enhanced CT, primary gastrointestinal stromal tumors in the omentum and mesentery are usually well-defined, huge masses that contain large areas of low-attenuation necrosis and hemorrhage and that lack central gas.

Adult↗
PubMedDate not supplied

[Fibroma of the root of small intestine mesentery].

Fibromas are rarely localized in the abdomen, but almost always in the mesentery or omentum. We present a 63-year old woman in whom the examination of the upper abdominal pain showed a well distinct abdominal mass at the level of the lower edge of the pancreas. During the operation a tumour, 100 x 87 x 70 mm in size, from the radix of small bowel mesentery, was excised. Seven months later the patient is symptom-free with normal ultrasonographic and CT findings.

Female↗
PubMed1993

Lymphangioma of the jejunal mesentery in an adult: a case report and a review of the Japanese literature.

A rare case of lymphangioma of the jejunal mesentery in a 34-year-old woman is presented. She was diagnosed as having an ovarian cyst preoperatively, but laparotomy revealed a cystic tumor of the mesentery that was histologically diagnosed as lymphangioma. Thus far, 44 cases of adult mesenteric lymphangioma have been reported in Japan. In nine cases, accurate diagnosis of mesenteric cysts was obtained preoperatively. In 31 cases, complete excision with or without bowel resection was done, whereas two cases were partially resected and one case was drained.

Adult↗
PubMed2007

Advances in small animal mesentery models for in vivo flow cytometry, dynamic microscopy, and drug screening.

Using animal mesentery with intravital optical microscopy is a well-established experimental model for studying blood and lymph microcirculation in vivo. Recent advances in cell biology and optical techniques provide the basis for extending this model for new applications, which should generate significantly improved experimental data. This review summarizes the achievements in this specific area, including in vivo label-free blood and lymph photothermal flow cytometry, super-sensitive fluorescence image cytometry, light scattering and speckle flow cytometry, microvessel dynamic microscopy, infrared (IR) angiography, and high-speed imaging of individual cells in fast flow. The capabilities of these techniques, using the rat mesentery model, were demonstrated in various studies; e.g., real-time quantitative detection of circulating and migrating individual blood and cancer cells, studies on vascular dynamics with a focus on lymphatics under normal conditions and under different interventions (e.g. lasers, drugs, nicotine), assessment of lymphatic disturbances from experimental lymphedema, monitoring cell traffic between blood and lymph systems, and high-speed imaging of cell transient deformability in flow. In particular, the obtained results demonstrated that individual cell transportation in living organisms depends on cell type (e.g., normal blood or leukemic cells), the cellos functional state (e.g., live, apoptotic, or necrotic), and the functional status of the organism. Possible future applications, including in vivo early diagnosis and prevention of disease, monitoring immune response and apoptosis, chemo- and radio-sensitivity tests, and drug screening, are also discussed.

Animals↗
PubMed1999

Effect of concentration and hyaluronidase on albumin diffusion across rabbit mesentery.

OBJECTIVE: To measure the diffusion coefficient of albumin through rabbit mesentery using the steady-state flux of radioactive tracer 125I-albumin. The effect of albumin concentration and testicular hyaluronidase were also studied. METHODS: Mesenteric tissue was bonded between two plates, exposing a 7 mm diameter surface, with two chambers on either side. One chamber was filled with a test solution of albumin containing the radioactive tracer and the other with lactated Ringer solution. The solutions in both chambers were stirred with small magnetic cylinders. The chamber filled with lactated Ringer solution was placed in a well-type NaI(Tl) detector, and the radiation emitted from the tracer that diffused across the mesentery was monitored continuously for 9 hours. The diffusion coefficient (D) was calculated using Fick's law of diffusion. The diffusion coefficient was measured at albumin concentration differences (delta C) between approximately 0 and 10 g/dL. The diffusion coefficient was also measured with testicular hyaluronidase at three different albumin-concentration differences. RESULTS: The diffusion coefficient increased significantly (P < 0.0001) approximately three-fold from a mean value of 2.2 x 10(-8) +/- 1.2 x 10(-8) (SD) cm2/s at 0-0.5 g/dL delta C to 5.9 x 10(-8) +/- 1.1 x 10(-8) (SD) cm2/s at 10 g/dL delta C. The values are much less than the free diffusion coefficient of albumin (6 x 10(-7) cm2/s). Testicular hyaluronidase added to the albumin solution decreased D by approximately 60%, but did not eliminate the increase in D with delta C. CONCLUSIONS: The increase in D with delta C and the reduced D with hyaluronidase were attributed to a reduced albumin-excluded volume caused by an interaction between albumin and hyaluronan. Further studies are required to define this interaction.

Albumins↗
PubMedDate not supplied

[Lymphatic cyst of the mesentery].

Lymphatic cyst of the mesentery is a rare lesion; one case per 100,000 hospital admissions is reported. A case of lymphatic cyst in a sixty-one-year-old woman is presented. The symptoms are extremely variable, not characteristic and correlated to the location and size of the cyst. Abdominal ultrasonography and computed tomography may lead to a correct diagnosis, which is regularly made at the time of abdominal exploration. In this case the cyst was enucleated from the mesentery with open surgery.

Female↗
PubMed2000

[Laparoscopy in diagnosis of intestinal mesentery acute circulatory disturbance].

Laparoscopic data on 74 patients with jejuno-ileal mesentery acute circulatory disturbance were analysed. Positive (diagnosis is confirmed) and negative (diagnosis is rejected) results of the investigation, reasons of false diagnosis and repeated laparoscopies were examined. Features of the jejuno-ileal mesentery acute circulatory disturbance laparoscopic picture are determined depending on its stage (ischemia, infarct, peritxnitis) and kinds (arterial thrombosis and embolism, venous thrombosis, unocclusive mesenteric ischemia).

Acute Disease↗
PubMed2005

Successful laparoscopic radiofrequency ablation of hepatocellular carcinoma adhered to the mesentery after transcatheter arterial embolization.

A 54-year-old male with hepatocellular carcinoma (HCC) underwent transcatheter arterial embolization (TAE) at a nearby hospital. He was then referred to our hospital for the purpose of additional treatment of HCC. Because TAE was not a complete therapy and HCC was growing and protruding from the left lobe of the liver, laparoscopic radio-frequency ablation (RFA) was chosen for the treatment of HCC. After inserting a laparoscope into the abdominal cavity, it was observed that HCC unexpectedly adhered to the mesentery as a result of TAE performed previously. After cutting off the adhered mesentery and removing it from the tumor, the combination therapy of percutaneous ethanol injection and RFA (PEI-RFA), developed at our department, was performed on the tumor. The tumor was successfully abrogated by PEI-RFA and the sufficient safety margin was confirmed by computed tomography after the treatment.

Arteries↗
PubMed2005

Malignant peripheral nerve sheath tumor originating in neurofibroma of the mesentery. Case report.

An 83-year-old woman was admitted to our hospital because of colicky pain under the right costal arch suggesting cholecystitis. Physical examination confirmed by ultrasound scan indicated a palpable tumor in that location. Laparotomy was performed and the tumor was removed. Histopathological examination revealed malignant peripheral nerve sheath tumor (MPNST) originating in neurofibroma of the mesentery. Macroscopic, histological and cytological features were typical for MPNST. High nuclear pleomorphism, hyperchromasia were observed but on average only two mitotic figures per high power field were seen. The growth fraction determined by Ki-67 immunoreactivity was about 30%. Immunohistochemical stains revealed positivity of individual cells for NK-1(CD57), S-100 protein and NSE. It was lack of positivity for cytokeratin, EMA, vimentin, desmin, SMA, CD34. We report a well documented case of MPNST originating in preexisting neurofibroma of the mesentery. To our knowledge, is the first case in the Polish literature.

Aged, 80 and over↗
PubMed1991

[The characteristics of the reactions of intact and sympathectomized microvessels of the rabbit mesentery to catecholamines].

The sensitivity of smooth muscle cells' adrenoreceptors to noradrenaline (NA) and dopamine (DA) was studied in intact and desympathised arterial microvessels of the rabbit mesentery. The arterioles differed from each other in their sensitivity to catecholamines depending on their diameter. However, in conditions of chemical desympathisation, the sensitivity to NA and DA increased in all the microvessels whereas the degree of narrowing of the microvessels' lumen remained practically the same. These findings suggest a heterogeneous character of physiological properties of vascular smooth muscle cells within the arterial part of the microcirculatory module of the rabbit mesentery.

Animals↗
PubMed1990

[Morphofunctional changes in the lymph nodes and microcirculatory bed of small-intestinal mesentery of dogs in septic peritonitis after endolymphatic administration of ampicillin].

With the aim to study effectiveness+ of endolymphatic (EL) administration of ampicillin (AC), using the model of an acute diffuse septic peritonitis in dogs, the morphological and morphometrical investigation has been performed concerning the state of the lymph nodes (LN), which are regional as regards the pathological focus (pelvic) and remote (tracheobronchial, mesenteric) and hemomicrocirculatory bed (HMCB) of the small intestine mesentery. All LN groups studied are involved in the pathological process, that produces certain increasing disturbances in the structure and cell composition in LN. In 6 h the changes are especially manifested in the pelvic LN, and in 18 h--in the animals without application of AC, or at its intramuscular injection LN lose their typical structure. Their dimensions and number of lymphoid nodules++ and medullary cords decrease, a sharp impoverishment of lymphocytes in LN is observed. By this time critical disturbances in the HMCB structure develop; they are characterized as presence of great amount of avascular areas in the mesentery, extended capillary loops, plasmatic saturation of interstitium. When AC is injected endolymphatically, simultaneously with peritonitis modelling T- and B-dependent zones in LN are preserved, a high volumetric part of lymphocytes is kept in all groups of LN, structure and function of HMCB are normalized. The pronounced delay in development and decreasing manifestation of infective-toxic disorder in LN and HMCB depend on effective concentrations of the antibiotic, produces in the lymphatic system.

Acute Disease↗
PubMed1986

Carcinoid infiltration and fibroplastic changes of the mesentery as a cause of malabsorption.

The presentation of carcinoid involvement of the mesentery is described, with clinical manifestation of severe malabsorption: angiographically it resembled retractile mesenteritis. The special biologic activity of the carcinoid cells inducing fibroblastic activity with secondary alterations of vascular, lymphatic and neural structures of the mesentery is discussed in relation to the altered physiology and morphology of the intestine, causing the clinical picture of sprue.

Aged↗
PubMed1985

Lipolymph nodes of the mesentery.

Although lipolymph nodes have previously involved only pelvic or retroperitoneal lymph nodes, two patients are presented with lipolymph nodes involving the intestinal mesentery. The definitive diagnoses were made by exploratory laparotomy and multiple biopsies of intrabdominal lymph nodes. Both patients with lipolymph nodes are obese, middle-aged, and female, which is the typical clinical presentation. The microscopic picture is distinctive. The lymph nodes are entirely replaced by adipose tissue and have a thin outer rim of nodal tissue. The patient with a diagnosis of lipolymph nodes of the mesentery or the pelvis and retroperitoneum should receive conservative surgical treatment. Since the disease appears to have a benign course, surgical extirpation of abnormal lymph nodes is not needed or warranted.

Adipose Tissue↗