Radiographic analysis of factors predisposing toward tendon tears in the knee extensor mechanism

Albuquerque, Rodrigo Pires e; Campos, André Luiz Siqueira; Santos Neto, José Félix dos; Karam, Evaldo; Neves, José Guilherme; Tullio, Paulo Di; Giordano, Vincenzo; Amaral, Ney Pecegueiro do

doi:10.1016/j.rboe.2014.04.021

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Original Articles • Rev. bras. ortop. 49 (04) • Jul-Aug 2014 • https://doi.org/10.1016/j.rboe.2014.04.021 copy

Radiographic analysis of factors predisposing toward tendon tears in the knee extensor mechanism^☆ ☆ Please cite this article as: Pires e Albuquerque R, Campos ALS, dos Santos Neto JF, Karam E, Neves JG, Di Tullio P, et al. Análise radiográfica de fatores predisponentes às rupturas tendinosas do mecanismo extensor do joelho. Rev Bras Ortop. 2014;49:374–378. ^☆☆ ☆☆ Work performed at the "Professor Nova Monteiro" Orthopedics and Traumatology Service, Miguel Couto Municipal Hospital, Rio de Janeiro, RJ, Brazil.

Authorship SCIMAGO INSTITUTIONS RANKINGS

Objectives:

To review radiographs of patients who suffered tendon tears of the knee extensor apparatus and observe alterations that might be factors predisposing toward this type of injury.

Methods:

We retrospectively analyzed 60 cases of injury to the knee extensor mechanism that were treated surgically at the Miguel Couto Municipal Hospital between March 2004 and March 2011. Four patients were excluded due to poor quality of the examination.

Results:

Of the 56 patients evaluated, 23 were considered to be normal and 33 presented radiographic alterations. Among these, eight (24.3%) presented suprapatellar osteophytes alone; seven (21.2%), infrapatellar calcification; seven (21.2%), suprapatellar calcification; six (18.2%), supra- and infrapatellar osteophytes; and five (15.1%), infrapatellar osteophytes alone.

Conclusion:

Radiographic alterations were frequently observed in patients with extensor mechanism tears.

Knee injuries; Knee; Rupture

Variable		n	%
Age(years)		42 ± 16 (10–80)
Sex
	Male	51	91.1
	Female	5	8.9
Side
	Right	22	39.3
	Left	34	60.7
Location
	Quadriceps	31	55.4
	Patella	19	33.9
	Patella/TAT	5	8.9
	Patella/sleeve fracture	1	1.8
Radiography
	Altered	33	58.9
	Normal	23	41.1
Type of radiological alteration
	Infrapatellar calcification	7	21.2
	Suprapatellar calcification	7	21.2
	Infrapatellar osteophytes	5	15.1
	Suprapatellar osteophytes	8	24.3
	Supra/infrapatellar osteophytes	6	18.2
Comorbidity
	Present	8	14.3
	Absent	48	85.7
Age was expressed as mean ± standard deviation (minimum–maximum)

Patient	Age	Sex	Side	Location	Radiograph	Comorbidities
1	24	M	R	Quadriceps	Suprapatellar calcification	No
2	34	F	R	Patella	Normal	No
3	35	M	R	Patella	Infrapatellar osteophytes	No
4	40	M	L	Quadriceps	Supra/infrapatellar osteophytes	No
5	65	M	R	Patella	Normal	No
6	34	M	R	Patella	Infrapatellar calcification	No
7	48	M	L	Quadriceps	Suprapatellar calcification	No
8	45	M	L	Quadriceps	Normal	Diabetes
9	45	M	R	Quadriceps	Normal	Diabetes
10	19	M	R	Patella/TAT	Normal	No
11	42	F	R	Quadriceps	Suprapatellar osteophytes	No
12	56	M	R	Quadriceps	Suprapatellar osteophytes	No
13	33	M	L	Patella	Infrapatellar osteophytes	No
14	28	M	L	Quadriceps	Normal	No
15	48	F	R	Patella	Normal	No
16	42	M	L	Quadriceps	Suprapatellar osteophytes	No
17	52	M	L	Patella	Supra/infrapatellar osteophytes	No
18	57	M	L	Quadriceps	Suprapatellar osteophytes	No
19	54	M	L	Patella	Infrapatellar calcification	No
20	10	M	R	Patella/sleeve fracture	Normal	No
21	80	M	L	Quadriceps	Supra/infrapatellar osteophytes	No
22	49	M	L	Patella/TAT	Infrapatellar calcification	No
23	43	M	L	Quadriceps	Normal	No
24	52	M	L	Patella	Infrapatellar calcification	No
25	60	M	L	Quadriceps	Suprapatellar calcification	No
26	66	M	L	Quadriceps	Suprapatellar calcification	No
27	48	M	R	Quadriceps	Suprapatellar osteophytes	No
28	40	M	L	Patella	Normal	No
29	42	M	R	Quadriceps	Normal	No
30	35	M	L	Quadriceps	Normal	No
31	50	M	R	Quadriceps	Supra/infrapatellar osteophytes	No
32	60	M	R	Quadriceps	Suprapatellar osteophytes	No
33	35	M	L	Patella	Normal	No
34	52	M	L	Quadriceps	Supra/infrapatellar osteophytes	Osgood–Schlatter
35	35	M	R	Patella	Infrapatellar osteophytes	No
36	45	M	L	Quadriceps	Suprapatellar osteophytes	No
37	26	M	R	Patella	Infrapatellar osteophytes	No
38	47	M	L	Quadriceps	Suprapatellar calcification	No
39	20	M	L	Patella	Normal	No
40	34	M	L	Quadriceps	Suprapatellar calcification	No
41	36	M	L	Quadriceps	Normal	No
42	22	M	L	Patella	Normal	No
43	62	M	L	Quadriceps	Suprapatellar osteophytes	No
44	47	M	L	Patella	Infrapatellar calcification	No
45	38	M	R	Patella	Infrapatellar osteophytes	No
46	15	M	L	Patella/TAT	Infrapatellar calcification	Osgood–Schlatter
47	29	M	L	Patella	Normal	No
48	25	M	R	Quadriceps	Normal	No
49	74	M	L	Quadriceps	Normal	Diabetes
50	74	M	R	Quadriceps	Supra/infrapatellar osteophytes	Diabetes
51	37	M	L	Quadriceps	Normal	No
52	13	F	L	Patella/TAT	Normal	No
53	13	F	R	Patella/TAT	Normal	No
54	49	M	L	Patella	Infrapatellar calcification	Renal insufficiency
55	49	M	R	Quadriceps	Suprapatellar calcification	Renal insufficiency
56	38	M	L	Quadriceps	Normal	No

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E-mail: rbo@sbot.org.br

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[1] *Corresponding author. E-mail: rodalbuquerque@ibest.com.br (R. Pires e Albuquerque).