CLINICAL HISTORY

38-year-old with knee pain while playing basketball.

Fig. 96A

Fig. 96B

FINDINGS

Lateral radiograph of the right knee (Fig. 96A) demonstrates patella alta and focal deficiency (arrow) in the proximal patellar tendon; distal patellar tendon is somewhat wavy. Long-axis gray-scale sonographic image of the right knee (Fig. 96B) demonstrates complete loss of continuity of the normal fibrillar echotexture of the proximal patellar tendon. Long arrows depict the tear edges. Short arrows depict intact tendon, which appears somewhat thickened and wavy because of loss of normal tensile stress; an element of tendinosis may also be present.

DIAGNOSIS

Patellar tendon rupture.

Notes：

1. patellar /p?'tel?/ /p?'tel?/ adj. 膝蓋骨的，髕骨的

2. tendon /'tend?n/ /'t?nd?n/ n. 腱，韌帶

3. patellar tendon 髕腱，髕韌帶

4. tensile stress 張力、應(yīng)力

5. tendinosis 退化，退行性變（chronic tendinitis）慢性肌腱炎

6. quadriceps /'kw?dr?seps/ /'kwɑdr?s?ps/ n. 四頭肌

Extensive

1. What is jumper’s knee?

Jumper’s knee refers to tendinosis of the proximal patellar tendon. Repetitive strong quadriceps contractions in the setting of a flexed knee, as may be seen in jumping sports such as basketball, in excess of the tensile strength of the tendon and at a rate greater than the tendon’s normal ability to heal itself result in a dysregulated healing response, that ultimately lead to derangement of the normal fibrillar architecture of the tendon. For reasons that are poorly understood, this almost always occurs at the proximal end of the tendon and begins at the deep border of the tendon. Paralleling the progression of tendinosis, tears begin at the deep border of the tendon. The pediatric version of jumper’s knee is Sinding-Larsen-Johansson syndrome, which is characterized by repetitive microtrauma to the proximal patellar tendon in the setting of a still partially cartilaginous inferior patellar pole; this condition typically occurs in active 10- to 15-year-olds. The usual findings of tendinosis are present with additional intratendinous ossifications possibly representing small avulsed fragments from the inferior patellar pole.

來(lái)源：每天朗讀一段醫(yī)學(xué)影像學(xué)英語(yǔ)文章

圈主

深圳市人民醫(yī)院放射科副主任醫(yī)師楊敏潔