TY  - JOUR
A1  - Cassel, Michael
A1  - Risch, Lucie
A1  - Intziegianni, Konstantina
A1  - Mueller, Juliane
A1  - Stoll, Josefine
A1  - Brecht, Pia
A1  - Mayer, Frank
T1  - Incidence of achilles and patellar tendinopathy in adolescent elite athletes
JF  - International journal of sports medicine
N2  - The study investigated the incidence of Achilles and patellar tendinopathy in adolescent elite athletes and non-athletic controls. Furthermore, predictive and associated factors for tendinopathy development were analyzed. The prospective study consisted of two measurement days (M1/M2) with an interval of 3.2 +/- 0.9 years. 157 athletes (12.1 +/- 0.7 years) and 25 controls (13.3 +/- 0.6 years) without Achilles/patellar tendinopathy were included at Ml. Clinical and ultrasound examinations of both Achilles (AT) and patellar tendons (PT) were performed. Main outcome measures were incidence tendinopathy and structural intratendinous alterations (hypo-/hyperechogenicity, vascularization) at M2 [%]. Incidence of Achilles tendinopathy was 1% in athletes and 0% in controls. Patellar tendinopathy was more frequent in athletes (13 %)than in controls (4%). Incidence of intratendinous alterations in ATs was 1-2% in athletes and 0 % in controls, whereas in PTs it was 4-6 % in both groups (p >0.05). Intratendinous alterations at M2 were associated with patellar tendinopathy in athletes (p <= 0.01). Intratendinous alterations at M1, anthropometric data, training amount, sports or sex did not predict tendinopathy development (p>0.05). Incidence often dinopathy and intratendinous alterations in adolescent athletes is low in ATs and more common in PTs. Development of intratendinous alterations in PT is associated with tend in opathy. However, predictive factors could not be identified.
KW  - epidemiology
KW  - young athletes
KW  - sonography
KW  - vascularization
KW  - hypoechogenicities
Y1  - 2018
U6  - https://doi.org/10.1055/a-0633-9098
SN  - 0172-4622
SN  - 1439-3964
VL  - 39
IS  - 9
SP  - 726
EP  - 732
PB  - Thieme
CY  - Stuttgart
ER  - 
TY  - JOUR
A1  - Cassel, Michael
A1  - Baur, Heiner
A1  - Hirschmueller, Anja
A1  - Carlsohn, Anja
A1  - Fröhlich, Katja
A1  - Mayer, Frank
T1  - Prevalence of Achilles and patellar tendinopathy and their association to intratendinous changes in adolescent athletes
JF  - Scandinavian journal of medicine & science in sports
N2  - Achilles (AT) and patellar tendons (PT) are commonly affected by tendinopathy in adult athletes but prevalence of symptoms and morphological changes in adolescents is unclear. The study aimed to determine prevalence of tendinopathy and intratendinous changes in ATs and PTs of adolescent athletes. A total of 760 adolescent athletes (13.0 +/- 1.9 years; 160 +/- 13cm; 50 +/- 14kg) were examined. History, local clinical examination, and longitudinal Doppler ultrasound analysis for both ATs and PTs were performed including identification of intratendinous echoic changes and vascularization. Diagnosis of tendinopathy was complied clinically in case of positive history of tendon pain and tendon pain on palpation. Achilles tendinopathy was diagnosed in 1.8% and patellar tendinopathy in 5.8%. Vascularizations were visible in 3.0% of ATs and 11.4% of PTs, hypoechogenicities in 0.7% and 3.2% as well as hyperechogenicities in 0% and 0.3%, respectively. Vascularizations and hypoechogenicities were statistically significantly more often in males than in females (P0.02). Subjects with patellar tendinopathy had higher prevalence of structural intratendinous changes than those without PT symptoms (P0.001). In adolescent athletes, patellar tendinopathy is three times more frequent compared with Achilles tendinopathy. Longitudinal studies are necessary to investigate physiological or pathological origin of vascularizations and its predictive value in development of tendinopathy.
KW  - Prevalence
KW  - tendinopathy
KW  - sonography
KW  - Doppler ultrasound
KW  - vascularization
KW  - hypoechogenicities
KW  - hyperechogenicities
KW  - adolescent athletes
Y1  - 2015
U6  - https://doi.org/10.1111/sms.12318
SN  - 0905-7188
SN  - 1600-0838
VL  - 25
IS  - 3
SP  - e310
EP  - e318
PB  - Wiley-Blackwell
CY  - Hoboken
ER  -