Relationship between the patellar height and the disorder of the knee extensor mechanism in immature athletes

Atsushi Hirano, Toru Fukubayashi, Tomoo Ishii, Naoyuki Ochiai

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


The purposes of this study were to evaluate the outcome of longitudinal research on the patellar height of immature athletes, and to clarify the relationship with disorders of the knee extensor mechanism. The patellar height of 40 young male soccer players (80 knees) was observed with radiographs of the bilateral knee joint for 2 years. The patellar height was measured using the epiphyseal line method. No subject showed patella alta before the occurrence of the disorder. Of the 12 knees in which the disorder occurred during the observation period, 10 knees (83%) had higher patella after the onset of symptoms than before. The patellar height in the painful stage was considered significant compared with the normal group. Although the patellar position in the predisorder stage was relatively high, this state was considered within the normal scope of physiologic variation, such as the growth spurt.

Original languageEnglish
Pages (from-to)541-544
Number of pages4
JournalJournal of Pediatric Orthopaedics
Issue number4
Publication statusPublished - 2001
Externally publishedYes


  • Epiphyseal line method
  • Growth spurt
  • Immature athletes
  • Osgood-Schlatter disease
  • Patella alta
  • Patellar height

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Surgery
  • Orthopedics and Sports Medicine


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