Portal vein branching anomaly occurs due to aberration of normal anastomotic patterns and involution of vitelline veins during development of portal vein. Anatomical knowledge of portal vein and its branching pattern is important for hepatobiliary surgeon and gastrointestinal intervention radiologist. We are reporting a case of absence of portal vein bifurcation showing single main intrahepatic portal vein with gradual decreasing caliber distally, in a young female patient on contrast-enhanced computed tomography study of abdomen. Few cases of absence of portal bifurcation have been reported in literature so far.
Abdomen ; Anatomic Variation ; Female ; Humans ; Portal Vein* ; Veins ; Vitellins

Vitelline veins are a pair of embryonic structures. The veins develop the portal vein system. Serious problems occur if the vitelline vein does not regress and becomes an aneurysm. Thrombus formation in the vitelline vein aneurysm could lead to portal vein thrombosis and portal hypertension unless promptly and correctly treated. Though vitelline vein aneurysm is an extremely rare anomaly, it rapidly progresses to portal vein thrombosis that requires prompt diagnosis and treatment. We reported a case of neonatal vitelline vein aneurysm and thrombosis that was cured by prompt operation.
Aneurysm* ; Diagnosis ; Embryonic Structures ; Humans ; Hypertension, Portal ; Infant, Newborn ; Portal Vein ; Thrombosis* ; Veins* ; Venous Thrombosis ; Vitellins*

Meckel's diverticulum is found in about 3% of the population, often incidentally during laparotomy or at autopsy. Over 50% of patients who develop symptoms from this anomaly are younger than 2 years of age. The most common symptom of this lesion is intestinal obstruction. Rarely Meckel's diverticulum is complicated by a mesodiverticular band, which is believed to be a remnant of a vitelline artery. We report a 11-year-old girl with small bowel obstruction because of an intestinal hernia beneath the mesodiverticular band. The causative factor was a stenotic area in the terminal ileum caused by a ringlike lipovascular mesenteric band encroaching externally on the lumen. Although the incidence of mesodiverticular bands complicating Meckel's diverticulum is quite low, the rapid clinical course and the associated high mortality rate make this an important disease.
Arteries ; Autopsy ; Child ; Female ; Hernia ; Humans ; Ileum ; Incidence ; Intestinal Obstruction* ; Laparotomy ; Meckel Diverticulum ; Mortality ; Vitellins

Of 72 cases with vitelline duct and vessel remnants, 45 (62.5%) had symptomatic lesions (mean age, 27.9 months) with male preponderance (4.6: 1). Among the 45 symptomatic lesions, there were 22 cases of Meckel's diverticulum, 6 cases of Meckel's diverticulum with fibrous band attached to the umbilicus, 6 cases of patent vitelline duct, 5 cases of vitelline artery remnant as fibrous band, 2 cases of umbilical sinus, 2 cases of umbilical polyp, and 2 cases of vitelline cyst. Twenty three cases (51%) presented with intestinal obstruction, 6 (13%) with rectal bleeding, 4 (9%) with perforated Meckel's diverticulum, 5 with intestinal fluid drainage through umbilicus, 5 with umbilical lesion, and 1 with abdominal mass. Intestinal obstruction due to fibrous band developed at infancy (average age, 4.6 months). About 82% of complicated Meckel's diverticulum (n=28) presented less than 4 years of age. Seventeen Meckel's diverticulums, 8 obliterated vitelline artery remnants, and 1 vitelline vein remnant as fibrous band were found incidentally at laparotomy.
Arteries ; Drainage ; Hemorrhage ; Humans ; Intestinal Obstruction ; Laparotomy ; Male ; Meckel Diverticulum ; Polyps ; Umbilicus ; Veins ; Vitelline Duct* ; Vitellins*

In serial sagittal sections of a fetus on week 9 (crown-rump length, 36 mm), we incidentally found absence of the usual portal vein through the hepatoduodenal ligament. Instead, an anomalous portal vein originated behind the pancreatic body, crossed the lesser sac and merged with the upper part of the ductus venosus. During the course across the lesser sac, the vein provided a deep notch of the liver caudate lobe (Spiegel's lobe). The hepatoduodenal ligament contained the hepatic artery, the common bile duct and, at the right posterior margin of the ligament, and a branch of the anomalous portal vein which communicated with the usual right branch of the portal vein at the hepatic hilum. The umbilical portion of the portal vein took a usual morphology and received the umbilical vein and gave off the ductus venosus. Although it seemed not to be described yet, the present anomalous portal vein was likely to be a persistent left vitelline vein. The hepatoduodenal ligament was unlikely to include the left vitelline vein in contrast to the usual concept.
Common Bile Duct ; Fetus ; Hepatic Artery ; Ligaments ; Liver ; Peritoneal Cavity* ; Portal Vein* ; Umbilical Veins ; Veins ; Vitellins

We intended to describe a case of chaunocephalosis and morphological characteristics of its causative agent, Chaunocephalus ferox, recovered from an oriental white stork, Ciconia boyciana, in the Republic of Korea. An oriental white stork was referred to the Wildlife Center of Chungbuk in Korea in February 2014 for severe depression with cachexia and it died the next day. At necropsy, the stomach was severely expanded and 7 thick-walled nodules were observed in the upper part of the intestine. Although the stomach was filled with full of foreign materials, the intestine was almost empty. The nodules were globular and total 9 flukes were recovered. They were 8,030–8,091 μm in length and 3,318–3,333 μm in maximum width. Because the flukes had bulbous forebody with short narrow subcylindrical hindbody, 27 collar spines, and vitelline follicles not reaching to the posterior end, the specimens were identified as being C. ferox. The cyst formation induced thickening of the intestinal wall with narrowing of the lumen that could have contributed to the gastric impaction to the death of the host. This is the first described case of chaunocephalosis and its causative agent C. ferox found from an oriental white stork in Korea.
Cachexia ; Chungcheongbuk-do ; Depression ; Intestines ; Korea* ; Republic of Korea ; Spine ; Stomach ; Trematoda ; Vitellins

A total of 44 adult or juvenile nutrias were necropsied for disease survey. A large nodule was found in the liver of a nutria. The histopathological specimen of the hepatic nodule was microscopically examined, and sectional worms were found in the bile duct. The worms showed a tegument with spines, highly branches of vitelline glands and intestine. Finally, we histopathologically confirmed fascioliasis in a wild nutria. In the present study, a case of fascioliasis in a wild nutria is first confirmed in Korea.
Adult ; Bile Ducts ; Fasciola hepatica ; Fascioliasis ; Humans ; Intestines ; Korea ; Liver ; Republic of Korea ; Spine ; Vitellins

An umbilical omphalomesenteric duct polyp arises from remnants of the omphalomesenteric duct, which connects the midgut to the Yolk sac of the embryo and is closed completely at 7 weeks. Persistence of the omphalomesenteric duct shows various clinical manifestations of embryologic anomalies such as umbilical enteric fistula, Meckel's diverticulum or vitelline cysts. In particular, the umbilical omphalomesenteric duct polyp should be clinically discerned from persistent granulation tissue or pyogenic granuloma and attention should be given to external openings with discharge, which can be suggestive of underlying anomalies. We herein report an case of an umbilical omphalomesenteric duct polyp in a 10-year-old male who had no underlying anomalies.
Child ; Embryonic Structures ; Fistula ; Granulation Tissue ; Granuloma, Pyogenic ; Humans ; Male ; Meckel Diverticulum ; Polyps* ; Vitelline Duct* ; Vitellins ; Yolk Sac

Polyvesicular vitelline tumor of the ovary is an extremely rare variant of yolk sac tumor. We present a case of pure polyvesicular vitelline tumor in a 43-year-old woman. Light microscopy revealed a predominantly polyvesicular pattern embedded in mesoblastic stroma with the cysts showing two type of lining; tall columnar and cuboidal, or mesothelioid cells. The lining atypical cells showed occasional mitoses and intracytoplasmic PAS positive hyaline globules. In some areas, the cystic space contained a large amount of intraluminal hyaline material. Immunohistochemically, alpha- fetoprotein and alpha-1-antitrypsin were detected as a fine granular deposit in the cytoplasm of epithelial cells and hyaline globules. Electron microscopically, marked specialization of the vesicular lining cells suggested a differentiation toward gut structures and mature yolk sac.
Adult ; Cytoplasm ; Endodermal Sinus Tumor ; Epithelial Cells ; Female ; Fetal Proteins ; Humans ; Hyalin ; Microscopy ; Mitosis ; Ovary* ; Vitellins* ; Yolk Sac

Polyvesicular vitelline tumor of the ovary is an extremely rare variant of yolk sac tumor. We present a case of pure polyvesicular vitelline tumor in a 43-year-old woman. Light microscopy revealed a predominantly polyvesicular pattern embedded in mesoblastic stroma with the cysts showing two type of lining; tall columnar and cuboidal, or mesothelioid cells. The lining atypical cells showed occasional mitoses and intracytoplasmic PAS positive hyaline globules. In some areas, the cystic space contained a large amount of intraluminal hyaline material. Immunohistochemically, alpha- fetoprotein and alpha-1-antitrypsin were detected as a fine granular deposit in the cytoplasm of epithelial cells and hyaline globules. Electron microscopically, marked specialization of the vesicular lining cells suggested a differentiation toward gut structures and mature yolk sac.
Adult ; Cytoplasm ; Endodermal Sinus Tumor ; Epithelial Cells ; Female ; Fetal Proteins ; Humans ; Hyalin ; Microscopy ; Mitosis ; Ovary* ; Vitellins* ; Yolk Sac