Jerabek Seth A, Asnis Peter D, Bredella Miriam A, Ouellette Hugue A, Poon Steven K, Gill Thomas J
Harvard Combined Orthopaedic Surgery Residency Program, Boston, MA 02114, USA.
Skeletal Radiol. 2009 Aug;38(8):785-90. doi: 10.1007/s00256-008-0644-z. Epub 2009 Feb 11.
To describe the correlation between medial patellar ossification and prior patella subluxation and/or dislocation.
A retrospective billing database search identified 544 patients who had been diagnosed with patellar instability over a 13-year period. One hundred twenty-eight patients met the inclusion criteria. After review by a staff orthopedic surgeon and two musculoskeletal radiologists, 28 patients were found to have medial patellar ossification. The size and location of medial patellar ossification was recorded.
Of the 28 patients (20 males, eight females, age 13-66 years, mean 28 years) who were found to have medial patellar ossification, 22 had radiographs, 16 had magnetic resonance imaging, and ten had both. The medial patellar ossification ranged in size from 2 to 18 mm with an average of 6.8 mm. Twelve were located in the medial patellofemoral ligament (MPFL), 14 in the medial joint capsule, and two in both the MPFL and joint capsule. Twenty-seven of 28 patients had a single ossification, and one patient had two ossifications. The timing from injury to first imaging of the lesion ranged from 10 days to a chronic history (> or = 35 years) of patellar instability.
Medial patellar ossification correlates with a history of prior patella subluxation and/or dislocation. The medial ossification can be seen within the MPFL or the medial joint capsule, suggesting remote injury to these structures. The presence of this lesion will prompt physicians to evaluate for patellar instability.
描述髌骨内侧骨化与既往髌骨半脱位和/或脱位之间的相关性。
通过回顾性计费数据库搜索，确定了544例在13年期间被诊断为髌骨不稳定的患者。128例患者符合纳入标准。经一名骨科 staff 外科医生和两名肌肉骨骼放射科医生检查后，发现28例患者有髌骨内侧骨化。记录髌骨内侧骨化的大小和位置。
在发现有髌骨内侧骨化的28例患者（20例男性，8例女性，年龄13 - 66岁，平均28岁）中，22例有X线片，16例有磁共振成像，10例两者都有。髌骨内侧骨化大小在2至18毫米之间，平均为6.8毫米。12个位于髌股内侧韧带（MPFL），14个位于内侧关节囊，2个同时位于MPFL和关节囊。28例患者中有27例有单个骨化，1例患者有两个骨化。从损伤到首次对病变进行成像的时间范围从10天到髌骨不稳定的慢性病史（≥35年）。
髌骨内侧骨化与既往髌骨半脱位和/或脱位病史相关。内侧骨化可见于MPFL或内侧关节囊内，提示这些结构有陈旧性损伤。该病变的存在将促使医生评估是否存在髌骨不稳定。
