School of Sports Science, Exercise and Health, The University of Western Australia, Perth, Australia.
J Sci Med Sport. 2012 May;15(3):190-4. doi: 10.1016/j.jsams.2011.11.251. Epub 2011 Dec 21.
To describe the prevalence and nature of lumbar spinal abnormalities in adolescent cricket fast bowlers.
Observational study.
46 asymptomatic fast bowlers aged 13-18 years participated in the study and were grouped into under-15 (U15), under-17 (U17) and under-19 (U19) classifications. All participants underwent magnetic resonance imaging of the lumbar spine and abnormalities of the pars interarticularis and intervertebral discs were graded according to type and severity. Other abnormalities were also noted.
Fifteen bowlers (33%) had at least one pars interarticularis abnormality. Six bilateral and 10 unilateral defects were identified. Of the 10 unilateral pars abnormalities, 6 occurred on the non-dominant side. Nineteen of the abnormalities occurred at the L5 vertebral level, 2 at L4 and 1 at L3. The most common type of pars abnormality was the subtotal stress fracture, which was found in 38% of bowlers aged 16 years and under. Sixteen participants (35%) were found to have degeneration of at least 1 lumbar disc and the prevalence increased with each successive age group (29% U15, 33% U17 and 43% U19). Of the 25 discs with signs of degeneration, 9 occurred at L4/5 and 7 at L5/S1. Eleven of these were classified as mild degeneration, 13 as moderate, and 1 as severe. Disc bulges were found in 33% of participants.
Lumbar radiological abnormalities are common in asymptomatic adolescent fast bowlers. Acute bone stress reactions of the lumbar pars interarticularis are visible on magnetic resonance imaging and, in some instances, occur before the onset of activity-related pain.
描述青少年板球快速投球手中腰椎脊柱异常的流行程度和性质。
观察性研究。
46 名无症状的快速投球手年龄在 13-18 岁之间，分为 15 岁以下（U15）、17 岁以下（U17）和 19 岁以下（U19）三个组。所有参与者都接受了腰椎磁共振成像检查，并根据类型和严重程度对椎间关节突和椎间盘的异常进行分级。还注意到了其他异常。
15 名投球手（33%）至少有一个椎间关节突异常。发现了 6 个双侧和 10 个单侧缺陷。在 10 个单侧椎间关节突异常中，有 6 个发生在非优势侧。19 个异常发生在 L5 椎体水平，2 个发生在 L4，1 个发生在 L3。最常见的椎间关节突异常类型是部分应力性骨折，在 16 岁及以下的投球手中占 38%。16 名参与者（35%）至少有 1 个腰椎间盘退变，而且随着年龄的增长，患病率逐渐增加（15 岁组为 29%，17 岁组为 33%，19 岁组为 43%）。在有退变迹象的 25 个椎间盘中，有 9 个发生在 L4/5，7 个发生在 L5/S1。其中 11 个被归类为轻度退变，13 个为中度退变，1 个为重度退变。椎间盘膨出在 33%的参与者中被发现。
腰椎影像学异常在无症状的青少年快速投球手中很常见。腰椎椎间关节突的急性骨应力反应在磁共振成像上可见，在某些情况下，在与活动相关的疼痛出现之前就已经发生。
