Ischio-anal fossa hydatid cyst.

Area of Science:

• Parasitology
• Surgical Pathology
• Medical Imaging

Background:

• Extrahepatic hydatid disease is uncommon and can present diagnostic challenges.
• Primary hydatid cysts in the perineal ischio-anal fossa are exceptionally rare.

Purpose of the Study:

• To report a rare case of primary hydatid disease in the ischio-anal fossa.
• To highlight the importance of considering hydatid disease in the differential diagnosis of perianal masses.

Main Methods:

• Clinical presentation of a painless left perianal mass over 8 months.
• Initial diagnosis via clinical and radiological assessment as a cystic lesion.
• Confirmation through surgical and pathological examination revealing hydatid disease.

Main Results:

• A 46-year-old female presented with a perianal mass.
• Surgical excision of the hydatid cyst was performed.
• The patient remained disease-free at 1-year follow-up.

Conclusions:

• Hydatid disease of the perianal region is a rare but important consideration.
• It should be included in the differential diagnosis for any perianal mass or lump.
• Early and accurate diagnosis is crucial for effective management.