Case Of the Week (COW) 20 Oct 2013
Answer:
Ascariasis.
Findings:
TRANSVERSE VIEW worm surrounded by the duct wall gives a target appearance LONGITUINAL VIEW Worm appear as parallel echogenic lines F/S/O ASCARIASIS.
Discussion:
Ascaris lumbricoides - a parasitic roundworm uses a fecal-oral route of transmission and is most common in children. The worm is generally 20 to 30 cm long and up to 6 mm in diameter. It is active within the small bowel and may enter the biliary tree retrogradely. The appearance of biliary ascariasis on sonography depends on the number of worms within the bile ducts at the time of the study. Most often, a single worm is identified that appears as a tube or as parallel echogenic lines within the bile ducts. On the transverse view, the rounded worm surrounded by the duct wall gives a target appearance Movement of the worm during the scan facilitates the diagnosis.
Contributed By:
Prof.Vijayalakshmi, Dr.Anbumalar, Dr.Devarajan, Dr.kanagasabai
Barnard Institute of Radiology, Institute of Child Health, Egmore, Chennai
Answer:
Ascariasis.
Findings:
TRANSVERSE VIEW worm surrounded by the duct wall gives a target appearance LONGITUINAL VIEW Worm appear as parallel echogenic lines F/S/O ASCARIASIS.
Discussion:
Ascaris lumbricoides - a parasitic roundworm uses a fecal-oral route of transmission and is most common in children. The worm is generally 20 to 30 cm long and up to 6 mm in diameter. It is active within the small bowel and may enter the biliary tree retrogradely. The appearance of biliary ascariasis on sonography depends on the number of worms within the bile ducts at the time of the study. Most often, a single worm is identified that appears as a tube or as parallel echogenic lines within the bile ducts. On the transverse view, the rounded worm surrounded by the duct wall gives a target appearance Movement of the worm during the scan facilitates the diagnosis.
Contributed By:
Prof.Vijayalakshmi, Dr.Anbumalar, Dr.Devarajan, Dr.kanagasabai
Barnard Institute of Radiology, Institute of Child Health, Egmore, Chennai