Is Hydatid Cyst with Musculoskeletal Involvement a Problem that Causes Morbidity? Long-Term Follow-Up and Functional Results.

Background: The aim of study is to evaluate the involvement characteristics of hydatid cysts, which are rarely involved the musculoskeletal system, and the results of recurrence, morbidity, and functional and mental scoring.
Methods: We retrospectively investigated 18 patients with skeletal hydatid disease. Patients were categorized as those with bone or skeletal muscle involvement. Pre- and post-operative physical component scores (PCS) and mental component scores (MCS) on the functional Short Form 12-item Survey were recorded in these patients.We compared the functional scores, number of recurrences, and lesion volumes between patients with hydatid cyst of bone (HCOB) and those with hydatid cyst of soft tissue (HCOST).
Results: This study included 11 women and 7 men with bone hydatid cysts. Patients' mean age was 38 years (range 22-70 years). Patients were followed up for a mean of 118.16 months (range 49-230 months). The mean lesion volume was 447.39 cm3 (36-1260 cm3). The 12th and 48th month PCS, the PCS was lower in the HCOB group during both periods (p = 0.04 and p = 0.001, respectively). The 48th month MCS was lower in the HCOB group (p = 0.04). Postoperative residual cysts were detected in five patients who underwent surgical treatment for bone c; all residual lesions were located in the pelvis. Conclusions: Bone hydatid cysts are associated with high recurrence rates, and treatment is challenging. In view of the low functional results and high infection and recurrence rates observed in patients over long-term follow-up, particularly in those with pelvic hydatid cysts, we conclude that this disease is associated with significant morbidity. © Indian Orthopaedics Association 2021.