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Massive Diffuse Intraperitoneal Multicystic Mass in An Infant

Authors
Journal
Saudi Journal of Gastroenterology
1319-3767
Publisher
Medknow Publications
Publication Date
Volume
18
Issue
2
Identifiers
DOI: 10.4103/1319-3767.93826
Keywords
  • Image Quiz
Disciplines
  • Biology
  • Chemistry
  • Communication
  • Medicine

Abstract

An 18-month-old boy was referred for painless progressively increasing abdominal distension, poor oral intake, and lethargy since 1 year. There was no history of fever, hematurea, or intestinal obstruction. The child was pale and had a pulse rate of 150 beats/min. The child had mild respiratory distress due to huge abdominal distension. The abdomen was tense and nontender. There was no evidence of intraperitoneal free fluid or any definitive lump. The hemogram showed anemia, other blood biochemistry test results were normal. Ultrasonography of the abdomen suggested the possibility of encysted ascites. A 64-slice contrast-enhanced computed tomography of abdomen showed diffuse intraperitoneal multicystic mass, composed of variable sizes and wall thickness cysts [Figure 1]. The definitive organ of origin could not be identified. Bowel loops were displaced upward by the mass. Diagnostic laparoscopy showed a pale, soft, extremely friable mass composed of cysts of variable sizes arising from the dome of the bladder. The cysts were noncommunicating and had no fluid. The mass was loosely adhered to the bowel, liver, and peritoneum. The rest of the abdominal organs were normal. Complementary cystoscopy was performed to rule out intraluminal extension of tumor, which was normal. Figure 1 A 64-slice contrast-enhanced computed tomography of abdomen (a) Coronal view demonstrating a multicystic mass with no fluid within the cysts occupying whole of the abdominal cavity and displacing bowels upward; (b) Bladder outline with both ureters are evident on posterior sections; and (c) Axial view suggesting a multicystic mass composed of cysts of variable sizes and wall thickness QUESTION Q1. What is the diagnosis? ANSWER Histopathology showed myxoid stroma containing undifferentiated round to spindle cells with Cambium layer of Nicholson. Furthermore, immunohistochemistry showed the tumor cells positivity for desmin, vimentin, actin, and myoglobi

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