ArticleActa ortopedica brasileira2025
ULTRASONOGRAPHY OF THE CARTILAGINOUS PATELLA IN PEDIATRIC PATIENTS: A CASE SERIES.
Article in Acta ortopedica brasileira, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Objective: To analyze cases with clinical suspicion of patellar abnormalities, before ossification of the patella and to characterize the spectrum of abnormalities of the cartilaginous infantile patella by ultrasonography. Methods: Retrospective study using the keyword "patella" in ultrasonography reports in the Radiology Information System (RIS). The main researcher performed patellar measurements in the group of patients and in a control group (9 patients) without clinical or ultrasonography abnormalities. Results: Twelve patients with suspected patellar abnormalities were identified, with a mean age of 9 months and 4 days (±1.9 years), 75% male. Findings: dislocation or subluxation associated with patellar hypoplasia (7 knees), low lying patella and patellar hypoplasia (2), unilateral patellar agenesis (1), bilateral patellar agenesis (1), patellar instability in dynamic assessment and absence of patellar morphological changes (1). In two patients, ultrasonography was negative. The craniocaudal diameter of the hypoplastic patellas measured 0.94 cm ± 0.24 cm and in the control group 1.24 cm and ±0.12 cm (p<0.01). The Insall-Salvati index adapted for ultrasonography measured 0.63±0.07 for the low lying patella and 0.93±0.16 in the control group (p=0.004). Conclusions: Ultrasonography was useful to characterize abnormalities of the cartilaginous patella, and the most frequent findings were instability and hypoplasia.
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