2026, Number 4
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Acta Ortop Mex 2026; 40 (4)
Extra-articular bone echinococcosis in the distal femur. Case report
Fishbein-Freiman A, Hofmeister C, Novak R, Grupper M, Fraind-Maya G, Nikomarov D
Language: Spanish
References: 26
Page: 262-267
PDF size: 1559.76 Kb.
ABSTRACT
Introduction: echinococcosis is a rare
parasitic disease that mainly affects the liver and lungs;
bone involvement is exceptional. The limited literature
on bone involvement makes it difficult to suspect this
diagnosis. The typically cystic lesions require urgent
surgical resection for diagnostic confirmation and initiation
of antiparasitic treatment with albendazole, thus avoiding
the risk of dissemination.
Clinical case: a female patient
from the Middle East presents with chronic pain in
her left knee that is exacerbated after trauma. Studies
reveal a bone echinococcal cyst. Intralesional resection
with cementoplasty impregnated with albendazole was
performed, supplemented with adjuvant oral albendazole.
The patient shows symptomatic improvement without
recurrence.
Conclusions: given the rarity of bone
echinococcosis, it is essential to recognize its clinical and
radiological manifestations in order to establish an early
diagnosis. Surgical treatment by cyst resection is the
first line of therapy, supplemented with oral antiparasitic
drugs to prevent local recurrence. In patients who are not
candidates for surgery, medical treatment reduces cyst
size and improves quality of life. Long-term follow-up is
essential to detect and treat possible recurrences early.
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