Echinococcus Granulosus: Liver
Echinococcus granulosus is a small tapeworm parasitic in dogs. Its larva, known as the hydatid,
may develop in nearly all mammals, forming hydatid cysts. Hydatid cysts may form in any tissue,
but are most common in liver, lung, and the central nervous system.
The diagnostic feature is the presence of the scolices or hooklets in the aspirate. Rupture of the
cyst can cause a fatal anaphylactic reaction.
Clinical History/Findings
The patient is a 7 year-old, Hispanic male presenting with a liver cyst.
Specimen Type
A CT guided cyst drainage and core biopsy of the liver was performed.
Cytologic Findings
Cytologic Diagnosis:
Presence of Echinococcus granulosus consistent with a Hydatid cyst.
Submitted by:
James W Huddleston, BS, CT (ASCP)
Amarillo Pathology Group
Amarillo, Texas
Echinococcus granulosus is a small tapeworm parasitic in dogs. Its larva, known as the hydatid,
may develop in nearly all mammals, forming hydatid cysts. Hydatid cysts may form in any tissue,
but are most common in liver, lung, and the central nervous system.
The diagnostic feature is the presence of the scolices or hooklets in the aspirate. Rupture of the
cyst can cause a fatal anaphylactic reaction.
Clinical History/Findings
The patient is a 7 year-old, Hispanic male presenting with a liver cyst.
Specimen Type
A CT guided cyst drainage and core biopsy of the liver was performed.
Cytologic Findings
Cytologic Diagnosis:
Presence of Echinococcus granulosus consistent with a Hydatid cyst.
Submitted by:
James W Huddleston, BS, CT (ASCP)
Amarillo Pathology Group
Amarillo, Texas
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| The Texas Society of Cytology |
Slide 2: High-powered view of the
scolices of E. granulosus (Pap Stain)
scolices of E. granulosus (Pap Stain)
Slide 1: High-powered view of
E. granulosus (Pap Stain)
E. granulosus (Pap Stain)
Slide 3: High-powered view of the scolices
of E. granulosus (Pap Stain)
of E. granulosus (Pap Stain)
Slide 4: Oil-immersion view of the
scolices of E. granulosus (Pap Stain)
scolices of E. granulosus (Pap Stain)
Slide 5: Tissue section showing
globoid organized structures with small
spines or hooklets.
globoid organized structures with small
spines or hooklets.
Slide 6: Tissue section showing globoid
organized structures with small spines or
hooklets.
organized structures with small spines or
hooklets.
