• The Korean Journal of Cytopathology
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• v.11 no.1
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• pp.35-39
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• 2000

Since inflammatory myofibroblastic turner was initially recognized in the lung, this tumor has been described in other extrapulmonary sites. In spite of relatively uniform histologic findings in various organs, a rarity in extrapulmonary sites and highly vascular characteristics frequently lead to a misdiagnosis in preoperative radiology and fine needle aspiration cytology. We present a case of inflammatory myofibroblastic tumor occurring in the mesentery of a 4-month-old girl. Fine needle aspiration cytology smear disclosed characteristic spindle cells intermixed with prominent mature plasma cells and lymphocytes. According to the immunohistochemical staining, we recognized that the intervening spindle cells are myofibroblasts which have reactivity for the both actin and vimentin.

• Advances in pediatric surgery
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• v.12 no.2
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• pp.232-237
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• 2006

Abdominal cystic lymphangiomas arising from the mesentery, omentum and retroperitoneum are rare and occasionally confused with other cause of acute abdomen. Sixteen children who underwent surgery for abdominal cystic lymphangioma between 1984 and 2005 at the Division of Pediatric Surgery, Keimyung University Dongsan Medical Center were evaluated retrospectively. There were 9 boys and 7 girls. Age ranged from 12 days to 13 years (mean age: 4.7years). The cysts were located in the omentum (4 cases),mesentery (9 cases: jejunum: 3, colon: 6). retroperitoneum (2 cases) and pelvic cavity (one case). The cyst content was hemorrhagic (8 cases), serous (5 cases), and inflammatory (2 cases), and chyle (one). Prenatal diagnosis was made in 3. The clinical features were variable, but abdominal pain, mass, and abdominal distention in order. There were 3 emergency operations in patients with complicated cyst, who were suspected of having panperitonitis and volvulus preoperatively. Complete excision was accomplished in all cases. There was one mortalityin a newborn with E.coli sepsis. Intestinal obstruction developed in 2 cases in long-term follow-up. No recurrence was observed. Although intraabdominal lymphangioma arising from mesentery, omentum and retroperitoneum are rare, it should be considered as a possible cause of acute abdomen.

• Advances in pediatric surgery
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• v.10 no.1
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• pp.47-51
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• 2004

Visceral lipoma originating from the mesentery is very rare in childhood. A 29-month-old male presented with painless abdominal distension. Abdominal ultrasonography and CT revealed a huge multilobulated hypodense mass in the peritoneal cavity. Exploratory laparotomy showed a $26{\times}25{\times}5cm$ sized encapsulated, lobulated, homogenous mass, which originated from the transverse mesocolon. Histologic examination revealed a lipoma. The postoperative course was uneventful.

• Advances in pediatric surgery
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• v.2 no.2
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• pp.148-150
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• 1996

Transmesenteric hernia, a type of internal hernias, is a rare cause of intestinal obstruction. This intraperitoneal hernia has no sac and is formed by protrusion of a loop of bowel through an aperture in the mesentery. Incarceration leads to intestinal obstruction and subsequently, strangulation and gangrene of varing lengths of intestine. This is a case report of 4-year-old girl with transmesenteric herniation of the terminal ileum through a defect in its own mesentery. Strangulation of the affected bowel necessitates resection and primary anastomosis with repair of mesenteric defect. The postoperative course was uneventful. Acute intestinal obstruction in the absence of an external hernia and with no history of a previous surgical procedure suggests the possibility of an internal hernia, especially if the patient has a history of chronic intermittent abdominal distress.

• Applied Microscopy
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• v.13 no.1
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• pp.41-47
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• 1983

A Scanning electron microscope which can obtain additional information not readily available with either the light or transmission electron microscope was used to study the mast cell shape and its granules in normal mammal tissue(rat mesentery, stomach and mouse stomach) by fretting cut using liquid nitrogen. The results showed that rat mesentery and mouse stomach mast cell surfaces had no ridges and microvilli, but revealed several microvilli projecting into the surrounding connective tissue in the rat stomach mast cell. The shape of the mast cell varied from discoid(in the rat mesenteric mast cell) to ellipsoid (rat and mouse stomach), ranging from 7.5 to $10{\mu}m$ in diameter. The shape of the nucleus was ellipsoid and nucleic membrane was adherent to the outer surface of the granules. The granules, approximately 0.2 to $0.9{\mu}m$ in diameter, were various shapes. Frequently, rounded protrusions of cytoplasmic granules could be discerned under the cell membrane. Many small granules were seen in the cytoplasm.

• Journal of the Korean Society of Radiology
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• v.81 no.2
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• pp.423-427
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• 2020

Angiosarcoma is a malignant endothelial cell tumor of lymphatic or vascular origin and is most commonly found in the skin and soft tissue. Primary mesenteric angiosarcoma has rarely been reported. Here, we present a case of primary mesenteric angiosarcoma manifesting as a gradually enhancing mass along with necrosis and hemorrhage.

• Journal of Veterinary Clinics
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• v.37 no.4
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• pp.208-212
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• 2020

A 6-year-old castrated male Russian Blue cat was presented for evaluation of dyschezia. Abdominal ultrasound revealed hyperechoic nodules in both kidneys, heterogeneous mass in abdomen, and extensive mesenteric thickening with multiple hypoechoic nodules. Computed tomography showed multiple hypodense lesions in both kidneys and diffuse nodular infiltration around the mesentery. Fine needle aspirates (FNA) acquired under ultrasound guidance from the mesentery consisted of large lymphocytes which have round to irregular nuclei with granular chromatin, prominent nucleoli and a small amount of basophilic cytoplasm. Polymerase chain reaction (PCR) for antigen receptor gene rearrangement result of FNA sample revealed a T-cell malignancy. The cat died from acute renal failure after 1 cycle of modified Madison-Wisconsin L-CHOP protocol. Postmortem examination revealed bilaterally enlarged lumpy-bumpy shaped kidneys. Histopathologic examination showed an infiltration of malignant lymphocytes into the renal parenchyma and mesentery. Immunohistochemical staining of the renal sample displayed a negative expression of CD3, PAX5, MUM-1, and CD79. The clinical features and prognosis of the cat with renal lymphoma with mesenteric lymphomatosis have been described in this report.

• Proceedings of the Korean Society of Veterinary Clinics Conference
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• 2006.05a
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• pp.185-185
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• 2006

• Korean Journal of Veterinary Research
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• v.56 no.4
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• pp.269-271
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• 2016

A female domestic ferret (Mustela putorius furo) presented to a veterinary clinic with a clinical history of anorexia and poor body condition. Due to gradual deterioration of the body condition, explorative laparotomy was performed. Diffusely, the mesentery was severely thickened and adhered with prominent mesenteric lymph nodes. A portion of the mesentery and mesenteric lymph nodes were biopsied and fixed. Microscopic analysis revealed severe pyogranulomatous peritonitis and lymphadenitis, but staining revealed no bacterial organisms. However, immunohistochemistry for feline coronavirus exhibited strong immunoreactivity, primarily in the macrophages. Based on these results, the case was diagnosed as ferret coronavirus infection.

• Applied Microscopy
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• v.15 no.1
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• pp.1-12
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• 1985

In this study, the pathway and date of migrating Primordial germ cells (PGCs) were observed light microscopically and ultrastructural changes of them during migration were observed by electron microscopic examination. For these purpose, alkaline phosphatase reactions were used for identifying the PGCs and acid phosphatase reactions were used for observing their degenerating activities. Also, effects of actinomycin D on the migration of PGCs were examined. According to these results, at the 9th gestation day, PGCs were observed in the endodermal cells of yolk sac, at the 11th gestation day, they were seen in the hindgut and then entered into the dorsal mesentery by the 13th gestation day. At the 14th gestation day, they were located in the genital ridges. When PGCs were located in the hindgut and genital ridges, the positive reactions of alkaline phosphatase were dominated, but acid phosphatase reactions were limited in all stage except they were in dorsal mesentery. However, these reactions were lessened in case of actinomycin D treatment. By electron microscopic examination, PGCs had pseudopodia, tail process, trailing cytoplasm and nuage as the ultrastructural characteristics. In addition, these morphological features were damaged by actinomycin D treatment.