Limb shortening in the course of solitary bone cyst treatment--a comparative study.
OBJECTIVE
The aim of this paper is to evaluate the frequency of limb shortening in the course of solitary bone cyst treatment. The correlation between the mode of treatment as well as the occurrence of pathological fracture, cyst location, volume, and locularity were examined.


METHODS
A retrospective analysis was carried out on 135 patients where 80 underwent curettage and bone grafting and 55 were administered methylprednisolone injection with a mean time to follow-up of 12 years.


RESULTS
Based on clinical and radiological evaluation, limb shortening was found in ten patients when the data before and after treatment was compared. Limb shortening ranging from 1 to 5 cm during the course of the treatment was observed: six in humerus, two in femur, two in tibia. Those with epiphyseal changes, magnetic resonance imaging to evaluate the degree of growth plate damage was performed. Patients with and without limb shortening did not differ statistically regarding the applied method of treatment. The cyst volume was significantly larger in the group of patients with limb shortening when compared to the group of patients with no limb shortening.


CONCLUSIONS
In patients treated with curettage and bone grafting, the mode of treatment does not increase the frequency of occurrence of iatrogenic limb shortening. In patients with limb shortening, a statistically significant larger volume of the cyst was observed.
Glowacki
Maciej
M
Department of Paediatric Orthopaedics, Karol Marcinkowski University of Medical Sciences, ul. 28 Czerwca 1956 135/147, 61-545, Poznań, Poland. glowackimaciej@o2.pl
Ignys-O'Byrne
Anna
A
Ignys
Iwona
I
Wroblewska
Katarzyna
K
D001845:Bone Cysts / Q000453:epidemiology* / Q000601:surgery*; D002648:Child; D015897:Comorbidity; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D007870:Leg Length Inequality / Q000453:epidemiology* / Q000601:surgery*; D008279:Magnetic Resonance Imaging / Q000706:statistics & numerical data*; D008297:Male; D011044:Poland / Q000453:epidemiology; D018570:Risk Assessment; D012307:Risk Factors; D016896:Treatment Outcome