The "Falling snowflakes" sign, which is characterized by multiple echogenic foci of hydatid sand
, is a pathognomonic finding for hydatid cyst.
Ultrasonography (US) is particularly helpful in the detection of daughter cysts internal membranes and hydatid sand
Solitary anechoic lesions are typical findings on ultrasonography, rarely mixture of infolded membranes, scoleces, and hydatid sand
may produce a highly echogenic (solid) pattern on sonography because of the large acoustic impedance differences between the intracystic components.
Telescope was reintroduced through the trocar into the cavity to confirm any remnants of daughter cysts, hydatid sand
and to confirm for any cysto-biliary communication.
USG is most sensitive in detection of membrane, septa and hydatid sand within cyst.
Type I: Simple cyst with no internal architecture: Well defined anechoic mass with or without hydatid sand.
Sonography is the most sensitive technique for detection of membranous septae and hydatid sand
within the cyst.
Ultrasonography helps in the diagnosis of hydatid cysts when the daughter cysts and hydatid sand
200ml of cyst fluid drained from the intact cyst and centrifuged for hydatid sand
37,53) Hydatid sands
may be visible by shifting patient's position during the procedure.
Ultrasound is the first line diagnostic tool of choice as it can detect daughter cysts, floating membranes and hydatid sands