Non-vertebral hydatidosis in bone: Difficulties in management

Area of Science:

• Infectious Diseases
• Surgical Pathology
• Immunology

Background:

• Bone hydatidosis is a rare parasitic infection caused by Echinococcus granulosus.
• Extravertebral bone hydatidosis presents diagnostic and therapeutic challenges.
• Surgical intervention is often necessary for bone hydatidosis.

Purpose of the Study:

• To evaluate the surgical treatment outcomes for extravertebral bone hydatidosis.
• To assess the diagnostic and prognostic utility of specific immunoglobulin E (IgE) in bone hydatidosis.

Main Methods:

• Retrospective study of 10 patients with non-vertebral bone hydatidosis treated surgically between 1990 and 2019.
• Surgical procedures included curettage or wide resection, followed by antihelminthic therapy.
• Specific IgE levels were analyzed in seven patients during treatment and at follow-up.

Main Results:

• Pelvic bone hydatidosis had the worst prognosis, with no cases achieving complete healing.
• Bacterial overinfection was a frequent complication post-surgery.
• Only 20% of femoral cases were disease-free at final follow-up; specific IgE showed false negatives and poor correlation with clinical outcomes in some cases.

Conclusions:

• Extravertebral bone hydatidosis is difficult to treat definitively due to factors like location, bone defect size, and bacterial superinfection.
• A negative specific IgE result does not exclude the diagnosis of bone hydatidosis.
• Surgical site infections and disease recurrence are significant concerns in managing bone hydatidosis.