Diagnostic Capability of Intra-Articular Injections for Femoroacetabular Impingement Syndrome: A Systematic Review.

OBJECTIVE: To review and critically appraise available literature concerning the diagnostic capability of intra-articular injections for femoroacetabular impingement (FAI) syndrome. DESIGN: Systematic review. SETTING: N/A. PARTICIPANTS: N/A. INTERVENTIONS: N/A. MAIN OUTCOME MEASURES: Studies assessing pain relief following intra-articular injections for the diagnosis of FAI syndrome, compared with arthroscopy as diagnostic reference standard, were considered eligible. Searches were performed across 8 databases, and the risk of bias was evaluated through the Quality Assessment of Diagnostic Accuracy Studies tool. RESULTS: From 489 articles identified, 4 were included for analysis. Intra-articular injections were composed of anesthetic agents (such as lidocaine, bupivacaine, and ropivacaine), combined or not with corticosteroids (triamcinolone and betamethasone). All studies were judged as "at risk of bias", and a substantial heterogeneity was found considering assessment methods and pain relief thresholds for a positive response to intra-articular injections. Overall, 2 studies reported that intra-articular injections presented a high accuracy in determining the presence of FAI syndrome. However, the remaining 2 studies indicated that intra-articular injections might present restricted diagnostic capability to discriminate FAI syndrome from healthy individuals or those with other hip pathologies. CONCLUSIONS: Based on limited evidence, the diagnostic capability of intra-articular injections for FAI syndrome cannot be supported. It remains unclear which pain relief thresholds are related to a higher diagnostic capability. The combination of anesthetics with corticosteroids should also be further explored, including multiple pain assessments for evaluation of prolonged effects.

Single-Leg Squat Test in the Clinical Setting Does Not Discriminate Patients With Femoroacetabular Impingement Syndrome From Asymptomatic Individuals.

CONTEXT: Laboratorial 3-dimensional kinematic analyses have shown changes in the single-leg squat's (SLS) pattern of patients with femoroacetabular impingement syndrome (FAIS). However, it is unknown whether clinicians are able to detect these changes using 2-dimensional kinematics. OBJECTIVE: To compare the frontal plane 2-dimensional kinematics of patients with FAIS and asymptomatic individuals in the SLS test performed in a clinical setting. DESIGN: Case-control study. SETTING: Physical therapy clinic. PARTICIPANTS: Twenty men with bilateral FAIS and 20 asymptomatic men. MAIN OUTCOME MEASURES: Two-dimensional kinematic analysis was collected in the frontal plane during the execution of the SLS test. The outcomes were squat depth, pelvic drop (pelvis angle relative to the horizontal plane), hip adduction (femur angle relative to the pelvis), and knee valgus (femur angle relative to the tibia). RESULTS: Most and least painful limbs of patients with FAIS had squat depth (9.8% [2.9%] and 9.5% [3.1%] of height), pelvic drop (4.2° [3.9°] and 3.7° [4.2°]), hip adduction (74.9° [5.8°] and 75.9° [5.7°]), and knee valgus (4.0° [11.0°] and 5.0° [9.9°]) similar to asymptomatic individuals (9.0% [2.3%], 4.8° [2.6°], 73.7° [4.9°], and -1.7° [8.5°]; P > .05 for all). CONCLUSION: The frontal plane 2-dimensional kinematic analysis of the SLS test in the clinical setting is not able to distinguish patients with FAIS from asymptomatic individuals.

Groin pain of neurological origin as a differential diagnosis of femoroacetabular impingement.

BACKGROUND: To describe the experience in the diagnostic process and treatment of patients with groin pain (GP) of neurological origin due to entrapment of the iliohypogastric (IH), ilioinguinal (IL) and genitofemoral (GF) nerves in a hip preservation clinic. METHODS: Retrospective study of patients with GP of neurological origin confirmed with ultrasound-guided nerve block. Clinical outcomes were reported in 21 cases (age, 53.3 ± 15.9 years) treated with conservative treatment from January to December 2019, and in 9 patients (age 43.7 ± 14.6 years) who underwent neurectomy from January 2015 to December 2019. Pain intensity was assessed with a numerical rating scale (NRS) before starting the diagnostic process (Day 0) and at the end of follow-up. RESULTS: All cases reported pain on groin palpation. Half of these cases also reported a positive FADIR test (flexion, adduction, internal rotation) (15/30). On day 0, the intensity of pain in cases treated with conservative treatment was severe in 19 patients (NRS 7-10) and moderate in 2 (NRS 4-6), with a median improvement of 7 points (interquartile range [IQR] 5.5-8.0) at the end of follow-up (p < 0.001). In neurectomy group, a similar improvement in pain severity was (Day 0: 9 points [IQR 8.0-9.0]; end of follow-up: 0 points [IQR: 0-2.0]; p = 0.002). At the end of the study, 17/21 patients with conservative treatment and 7/9 with neurectomy were pain free or with mild pain (NRS < 3). CONCLUSIONS: In cases with PG of neurological origin, there is a high frequency of false positives in the FADIR test. Our findings suggest that neurectomy is a treatment option for patients in whom conservative treatment fails, providing significant pain relief.

Correlation between Intensity of Pain and Disability Due to Intra-articular Lesions in Patients with Femoroacetabular Impingement Syndrome / Correlação entre intensidade da dor e incapacidade com as lesões intra-articulares em pacientes com síndrome do impacto femoroacetabular

Abstract Objective To correlate radiographic alterations and lesions in intra-articular structures of the acetabulum with the intensity of pain and disability of patients diagnosed with femoroacetabular impingement syndrome. Methods A retrospective analysis of the preoperative data of 182 patients (190 hips) was performed. Clinical variables such as age, gender, the practice of physical activity, and radiographic variables, such as the Wiberg and alpha angles, were evaluated. Through an intraoperative video, the extent of the chondral and labial lesions was evaluated considering the clock-face method, the degree of joint involvement by the Outerbridge classification, and the presence of wave lesions. The variables were analyzed by linear regression, with the intensity of the pain assessed by the Visual Analog Scale (VAS), and functional disability measured by the Modified Harris Hip Score (mHHS). Results The mean age of the patients was of 38.5 ± 9.6 years, the mean intensity of the pain was of 7.8 ± 1.6, and the mean mHHS score was of 56.3 ± 12.7. In total, 61% of the sample were classified as Outerbridge III or IV, and 12.6% had wave lesions. There was a correlation between the male gender (r = 0.497) and lower intensity of the pain, and a correlation of age (r = -0.27), the male gender (r = 8.419) and physical activity with higher functional scores on the mHHS (r = 4.729). Conclusion There was no correlation of the radiographic and arthroscopic parameters of the present study and the intensity of pain and the disability of the patients. The male gender is related to lower intensity of pain, and higher functional ability is related to the male gender, lower age, and the practice of physical activity. Level of Evidence IV.

Resumo Objetivo Correlacionar alterações radiográficas e lesões de estruturas intra-articulares do acetábulo com a intensidade da dor e a incapacidade de pacientes com diagnóstico de síndrome do impacto femoroacetabular. Métodos Realiou-se uma análise retrospectiva de dados pré-operatórios de 182 pacientes (190 quadris). Foram avaliadas variáveis clínicas como idade, sexo e prática de atividade física, e variáveis radiográficas, como ângulo de Wiberg e o ângulo alfa. Por meio do vídeo intraoperatório, foi avaliada a extensão das lesões condrais e labiais considerando-se o método clock-face, o grau de comprometimento articular pela classificação de Outerbridge, e a presença de lesão em onda. As variáveis foram analisadas por meio de regressão linear, tendo como variáveis dependentes a intensidade da dor, avaliada pela Escala Visual Analógica (EVA), e a incapacidade funcional, mensurada pelo Harris Hip Score modificado (HHSm). Resultados A média de idade dos pacientes foi de 38,5 ± 9,6 anos, a da intensidade da dor, 7,8 ± 1,6, e a do HHSm, 56,3 ± 12,7. No total, 61% da amostra apresentava Outerbridge III ou IV, e 12,6% apresentava lesão em onda. Observou-se correlação do sexo masculino (r = 0,497) com menor intensidade da dor, e correlação da idade (r = −0,27), do sexo masculino (r = 8,419) e da realização de atividade física com maior escore funcional no HHSm (r = 4,729). Conclusão Não houve correlação dos parâmetros radiográficos e artroscópicos deste estudo com a intensidade da dor e a incapacidade dos pacientes. O sexo masculino está relacionado com menor intensidade da dor, e maior capacidade funcional está relacionada com o sexo masculino, menor idade, e a prática de atividade física. Nível de Evidência IV.

Validation of the Brazilian version of the Hip Sports Activity Scale (HSAS) for patients with femoroacetabular impingement: a cross-sectional study.

BACKGROUND: The Hip Sports Activity Scale (HSAS) is a hip-specific instrument for assessing the present levels of physical activity among patients with femoroacetabular impingement (FAI) syndrome. When evaluating treatment outcomes in patients with FAI syndrome, it is necessary to use joint-specific instruments and ones that can evaluate the levels of physical activity in these patients, such as the HSAS-Brazil. OBJECTIVE: To validate the HSAS-Brazil among a group of physically active patients after arthroscopic treatment of FAI syndrome. DESIGN AND SETTING: Cross-sectional research of quantitative and qualitative types using data obtained from July 2018 to October 2019. METHODS: A total of 58 patients of both genders diagnosed with FAI syndrome and who had undergone hip arthroscopy participated in this research. To establish reliability and validity, patients first answered the Brazilian versions of the 12-Item Short-Form Health Survey (SF-12), Nonarthritic Hip Score (NAHS), and HSAS; after a 48-hour interval, they answered the HSAS-Brazil again. RESULTS: For test-retest reliability, the interclass correlation was 0.908 (P < 0.001). The HSAS-Brazil correlated to the NAHS-Brazil (r = 0.63, P < 0.001), as well as the SF-12 (Physical Health) (r = 0.42, P = 0.001). CONCLUSION: The HSAS-Brazil was validated and proved to be a reliable and valid scale to assess sports activity levels in physically active patients with FAI syndrome after arthroscopic treatment.

Dolor de cadera en adolescentes: estudio y tratamiento / Hip pain in adolescent: assessment and treatment

En adolescentes que consultan por dolor de cadera o pelvis, es crucial una adecuada historia clínica para orientarnos sobre la etiología del dolor y comprender los mecanismos que lo generan. Es importante conocer y realizar un exhaustivo examen físico, con especial énfasis en la cadera, incluyendo pruebas específicas para diferentes patologías, además de comprender las indicaciones de los diferentes estudios de imágenes, para así lograr un correcto diagnóstico.Entre las causas más frecuentes de coxalgia en adolescentes debemos considerar la epifisiolisis, el pinzamiento femoroacetabular con o sin roturas del labrum, las lesiones avulsivas de la pelvis, la coxa saltans, entre otras. Aunque son poco frecuentes, patologías sistémicas como reumatológicas y oncológicas también deben ser descartadas en adolescentes. Un diagnóstico de certeza nos permitirá realizar una adecuada estrategia de tratamiento, a fin de lograr una rehabilitación precoz y evitar futuras complicaciones.

In adolescents presenting with hip or pelvis pain, an adequate medical history is crucial to guide the etiology and understand the mechanisms that generate it. It is important to know and carry out an exhaustive physical examination, with special attention to the hip, including specific tests for different pathologies, in addition to understand the indications of the different imaging studies, in order to achieve a correct diagnosis. Among the most frequent causes of hip pain in adolescents, we must rule out slipped capital femoral epiphysis, femoroacetabular impingement with or without labral tears, avulsion lesions of the pelvis, snapping hip, among others. Although rare, systemic pathologies such as rheumatologic and oncologic diseases must also be ruled out in adolescents. An accurate diagnosis will allow us to carry out an adequate treatment strategy, in order to achieve early rehabilitation and avoid future complications.

Frequency of Subspine Impingement in Patients With Femoroacetabular Impingement Evaluated With a 3-Dimensional Dynamic Study.

PURPOSE: (1) To estimate the frequency of subspine impingement (SSI) morphology in patients with a diagnosis of femoroacetabular impingement (FAI) and (2) to describe the performance of the alpha angle, range of motion, and femoral and acetabular anteversion for the identification of cases with and without SSI morphology. METHODS: We performed a retrospective observational study of patients with symptomatic FAI evaluated by computed tomography between February 2015 and June 2017. SSI morphology was identified using a 3-dimensional dynamic study with Move Forward software. A case was considered positive if a contact area of the anterior inferior iliac spine with the femoral neck was evidenced. Measurements of acetabular anteversion, femoral anteversion, the lateral center-edge angle, the alpha angle, and the neck-shaft angle, as well as range-of-mobility data, were collected. RESULTS: The study included 135 patients (194 hips), with a mean age of 39.1 ± 13.9 years; 65.2% were women. SSI morphology was found in 23.7% of hips (46 hips) (95% confidence interval, 18.3%-30.2%). Of the hips identified with SSI, 52.2% had a type I anterior inferior iliac spine, 41.3% had type II, and 6.5% had type III. In hips with SSI, median femoral anteversion was 5.6° (interquartile range, 2.1°-7.5°) and values of less than 8° would increase the suspected SSI morphology (81.8% sensitivity, 70.5% specificity). CONCLUSIONS: SSI morphology is a frequent finding in patients with symptomatic FAI through a 3-dimensional dynamic study. A decrease in femoral anteversion could be considered a useful criterion to suspect SSI morphology. LEVEL OF EVIDENCE: Level IV, case series.

Caso Clínico: Luxación Controlada de Cadera. Epifisiólisis de Cabeza Femoral / Case Report: Controlled Hip Dislocation. Slipped Capital Femoral Epiphysis

INTRODUCCIÓN: La epifisiólisis de la cabeza femoral es el desplazamiento de la epífisis con respecto a la metáfisis, en dirección anterosuperior; su etiología es desconocida, frecuente en adolescentes, periodo peripuberal, y con índice de masa corporal elevado, edad promedio entre 12 y 18 años. Su incidencia es variable, 0.2 (Japón) a 10 (Estados Unidos) por 100 000 habitantes. Se caracteriza por dolor progresivo en cadera, con irradiación a la ingle o rodilla, se asocia a cojera; con la detección precoz se puede instaurar un tratamiento adecuado, el más aceptado es la fijación in situ con tornillos centrales. CASO CLÍNICO: Paciente de sexo femenino 14 años de edad sin antecedentes patológicos, acudió al servicio de ortopedia infantil por presentar dolor lancinante crónico de cadera derecha de nueve meses de evolución que aumenta con la deambulación, diagnosticada por clínica y exámenes complementarios de imagen de epifisiólisis de cabeza femoral. Se realizó luxación quirúrgica de la cadera y reducción abierta anatómica con colocación de tornillos esponjosos. EVOLUCIÓN: Al tercer día de la cirugía, se decide alta hospitalaria; deambulación con muletas y sin apoyo durante un mes posquirúrgico. La osteosíntesis permaneció durante un año con controles mensuales y fisioterapia correspondiente; se ha evidenciado evolución favorable; arcos de movilidad de cadera conservados, deambulación normal, sin complicaciones. CONCLUSIÓN: El tratamiento inicial de un paciente con epifisiólisis de cabeza femoral estable depende del tiempo de evolución y se realiza fijando con tornillos o agujas mediante la luxación anatómica de la cadera y osteoplastia de remodelación del cuello femoral. La mayoría de los pacientes no desarrollan necrosis ni condrolisis y los resultados a largo plazo con la fijación in situ suelen ser excelentes, a diferencia de los pacientes con diagnóstico tardío.

BACKGROUND: The epiphysiolysis of the femoral head is the displacement of the epiphysis with respect to the metaphysis, in anterosuperior direction; it is etiology is unknown, frequent in adolescents, peripubertal period, and with high body mass index, average age between 12 and 18 years. It is incidence is variable, 0.2 (Japan) to 10 (United States) per 100 000 inhabitants. It is characterized by progressive pain in the hip, with irradiation to the groin or knee, is associated with lameness; with the early detection, an adequate treatment can be established, the most accepted one is the in situ fixation with central screws. CASE REPORT: A 14-year-old female patient with no pathological history attended the Children's Orthopedic Service due to the chronic lancinating pain of the right hip, which increases with walking, it is diagnosed by clinical examination and complementary exams of femoral head epiphysiolysis. Surgical dislocation of the hip and anatomical open reduction with placement of spongy screws was performed. EVOLUTION: On the third day of surgery, hospital discharge is decided; walking with crutches and without support during a postoperative month. The osteosynthesis remained for a year with monthly controls and corresponding physiotherapy; it has been evidenced favorable evolution; hip mobility arches preserved, normal ambulation, without complications CONCLUSIONS: The initial treatment of a patient with epiphysiolysis of stable femoral head depends on the evolution time and is done by fixing with screws or needles with of anatomical dislocation of the hip and osteoplasty of femoral neck remodeling. Most patients do not develop necrosis or chondro- lysis and long-term results with in situ fixation are usually excellent, unlike patients with late diagnosis.

Avaliação da torção femoral por tomografia computadorizada em pacientes jovens sem artrose e com dor no quadril por impacto fêmoro-acetabular / Femoral torsion evaluation by computed tomography in young patients without arthrosis with hip pain and femoral-acetabular impingement

Com a descoberta do impacto fêmoro-acetabular (IFA) que corresponde a maior causa de artrose do quadril, a análise biomecânica do quadril tornou-se fundamental. O objetivo do trabalho foi avaliar por tomografia computadorizada a torção femoral em pacientes jovens sem artrose com dor no quadril por IFA. No período entre janeiro de 2017 e março de 2018 foram avaliados 26 pacientes (52 quadris) entre 18 a 45 anos com dor no quadril e sem artrose. Todos os pacientes apresentavam dor e IFA (9 bilaterais) totalizando 35 quadris, sendo a maioria homens (73%). A idade média foi de 35 anos para ambos os sexos. O índice de massa corporal médio foi de 19 kg/m2 para mulheres, 24 kg/m2 para homens e a escala de Harris média foi de 67 pontos. Foram encontradas alterações da torção femoral em 11 quadris com dor (31%). A torção média encontrada foi de 14,5 graus, variando 0 a 39 graus (coeficiente de variabilidade= 60%). Pacientes com dor no quadril, torção femoral alterada e impacto do tipo CAM não apresentaram diferença quando comparados aos quadris sem dor (controle) (p= 0,234), como também no impacto tipo Misto (p= 0,314). No impacto tipo Pincer, a torção média dos quadris dolorosos foi de 16,63 graus e a torção média dos controles foi de 11,77 graus (p= 0,045). A presença de alterações na torcionais em quase 1/3 dos pacientes com IFA e a alta variabilidade encontrada revelaram a importância da medida da torção femoral nesta doença

The aim of the study was to evaluate femoral torsion in young patients with hip pain and femoral acetabular impingement (FAI). After the discovery of impingement, the complete analysis from the hip biomechanics has become essential. Twenty-six patients from 18 to 45 years presenting hip pain without arthrosis (Tonnis< 2) were evaluated. All patients presented both pain and FAI (9 bilateral), mostly man (73%). The average age was 35 years for both genders. BMI was 19 kg/m2 for women and 24 kg/m2 for men and the mean modified Harris Hip Score was 67 points. We have found femoral torsion changes in 11 hips with pain (31%) and high variability (60%). The mean femoral torsion was 14,5 degrees, ranging from 0 to 39 degrees. Patients with hip pain, CAM impingement and altered femoral torsion had no correlation when compared to controls (without pain) (p= 0.234), neither Mixed impingement (p= 0,314). Patients with Pincer impingement and painful hips had higher femoral torsion (16,63 degrees) than controls (11,77) (p= 0.045). The presence of torsional alterations in almost 1/3 of the patients with FAI and the high variability reveal the importance of measuring femoral torsion at this disease

Subspine Hip Impingement: An Unusual Cause of Hip Pain in an Elite Weightlifter.

Anterior hip pain can be difficult to diagnose due to the many pathologies and overlapping pain patterns that exist in the hip region. Clinical findings of pain at the anterior inferior iliac spine with passive hip flexion, proximal quadriceps pain and weakness, and painful impingement tests of the hip may be indicative of subspine hip impingement. This report describes the diagnosis and treatment of anterior hip pain, including subspine impingement and femoroacetabular impingement in an elite weightlifter. This case also describes how with the correct diagnosis and treatment, the athlete returned to play to her previous level of sport 11 months after a complex hip injury.

Prevalencia de deformidades tipo Cam de cadera en personas asintomáticas / Hip Cam type deformity in asymptomatic patients

Introducción: Si bien se considera al Síndrome de Fricción Femoroacetabular (SFFA) como un factor predisponente para el desarrollo de coxartrosis, no todas las caderas con deformidad tipo Cam son sintomáticas. El objetivo del presente estudio fue determinar la prevalencia de deformidades tipo Cam en personas asintomáticas que concurrieron a nuestra institución. Material y métodos: Evaluamos de forma consecutiva un total de 168 caderas en 84 personas voluntarias, asintomáticas, a quienes se les realizó una radiografía de ambas caderas de perfil. Se utilizó la medición del ángulo α, siendo indicativo de la presencia de deformidad tipo Cam un ángulo α > 50°. Resultados: Se objetivó un ángulo α promedio de 51,66° (rango 30-85°). Dieciséis (19%) presentaron un ángulo α mayor a 50° en al menos una de sus caderas. En éstos, el ángulo α presentaba un valor promedio de 63,92° (rango 51-85°). En los 68 individuos restantes, el ángulo α presentaba un valor promedio de 42,36° (rango 30-48°). En cuanto a la distribución por sexo, encontramos la presencia de una deformidad tipo Cam en el 22,7% de los varones y en el 5,5% de las mujeres. Conclusión: Debido a la alta prevalencia de lesiones tipo Cam en pacientes asintomáticos, creemos que un ángulo α elevado por sí solo no asegura la presencia de síntomas o la progresión a artrosis.

Introduction: While Femoroacetabular Impingement (FAI) is considered as a predisposing factor for the development of hip arthritis, not every hip with Cam deformity is symptomatic. The aim of this study was to determine the prevalence of Cam deformities in asymptomatic people that visited our hospital. Methods: We evaluated consecutively a total of 168 hips in 84 volunteers, asymptomatic, who underwent an lateral X-rays of both hips. Measuring the angle α was used, being indicative of the presence of one Cam type deformity, with an α > 50° angle. Results: An average α angle 51.66° (range 30-85°) was observed. 16 (19%) had an α angle greater than 50° in at least one of their hips. In these, the α angle had an average value of 63.92 ° (range 51-85°). In the remaining 68 individuals, the α angle had an average value of 42.36° (range 30-48°). In terms of distribution by sex, we found the presence of a Cam deformity type in 22.7% of males and 5.5% of women. Conclusion: Due to the high prevalence of Cam injuries in asymptomatic patients, we believe that an increase of the α angle itself doesn´t ensure the presence of symptoms or progression of osteoarthritis.

How Often Does Femoroacetabular Impingement Occur After an Innominate Osteotomy for Acetabular Dysplasia?

BACKGROUND: Femoroacetabular impingement is increasingly recognized as a cause of hip pain but its incidence after an innominate osteotomy for the correction of acetabular dysplasia has not been determined. This information would be essential for the orthopaedic surgeon because it has the potential to produce a poor outcome in the long term when trying to balance acetabular instability and overcorrection. QUESTIONS/PURPOSES: The purposes of our study were (1) to determine the frequency with which clinically relevant femoroacetabular impingement (FAI) occurs after an innominate osteotomy for the treatment of acetabular dysplasia; (2) to determine risk factors for the development of FAI; and (3) to compare postoperative radiographic and clinical outcomes in patients having undergone an innominate osteotomy for the correction of acetabular dysplasia both with and without FAI. METHODS: This was a retrospective review of 154 hips (132 patients) that had undergone an innominate osteotomy for acetabular dysplasia and were evaluated at a minimum followup of 10 years (mean = 12 years). Mean age at the time of surgery was 3 years, 114 hips had a concomitant open reduction, and 54 hips also had femoral shortening. One hundred eight hips had a Salter osteotomy and 46 had a Pemberton osteotomy. Radiographs were analyzed to determine the lateral center-edge angle (CE angle) and the presence of a crossover sign. The diagnosis of FAI was established when the CE angle was greater than 40°, there was a positive crossover sign, and the patient had groin pain when flexing the hip less than 90°. Comparisons between nonparametric variables were performed with a Mann-Whitney's U test. Categorical variables were compared with a chi-square test. Change in acetabular index (correction) was dichotomized considering 20° of correction as the cutoff point. Association is presented as odds ratio (95% confidence interval), and logistic regression was performed. RESULTS: According to our criteria, 18 of 154 hips had FAI (12%). Of the 18 patients with FAI, 10 had undergone a Pemberton osteotomy (10 of 46 [22%]) and eight a Salter osteotomy (eight of 108 [7%]). A change in the postoperative acetabular index greater than 20° was associated with a greater likelihood of developing FAI. The mean postoperative acetabular index was lower for the group with FAI, for whom it was 20°, compared with the group without FAI, for whom it was 27° (p = 0.04). The mean Iowa Hip Score for the group with FAI was 85, whereas for those without FAI, it was 93 (p = 0.03). CONCLUSIONS: FAI is not common after an innominate osteotomy for the treatment of acetabular dysplasia; however, overcorrection is related to a higher incidence. When FAI is present, it can affect the outcome. Overcorrection should be avoided when performing an innominate osteotomy for the treatment of acetabular dysplasia because it can create iatrogenic FAI and have an adverse effect on outcome. LEVEL OF EVIDENCE: Level III, therapeutic study.

Pinzamiento femoroacetabular, causa de dolor en la cadera en el adulto joven / Femoroacetabular impingement causing hip pain in young adults

El dolor de la cadera en adultos ha sido tradicionalmente asociado con osteoartritis en dicha articulación. Sin embargo, vemos a muchos pacientes jóvenes con dolor en la cadera, sin artritis, en nuestras consultas. Recientemente, un anormal contacto entre el acetábulo y la unión de cabeza-cuello femoral, conocido como síndrome de pinzamiento femoroacetabular se ha reconocido como una causa preartrítica relativamente común de estos síntomas. Se realizó una amplia revisión bibliográfica con la finalidad de conocer la incidencia de pinzamiento femoroacetabular reportada en la literatura internacional así como todo lo relacionado con el diagnóstico clínico-radiológico y el tratamiento de esta afección. El pinzamiento femoroacetabular es una de las principales causas de dolor en la cadera del adulto joven así como de osteoartritis; la artroscopia de cadera va tomando un papel cada vez más preponderante en el tratamiento de esta afección(AU)

Hip pain in adults has traditionally been associated with osteoarthritis in that joint. However, in our consultations we see many young patients with hip pain, with no arthritis. Recently, an abnormal contact between the acetabulum and the femoral head-neck union, known as femoroacetabular impingement syndrome has been recognized as a relatively common pre-arthritis cause of these symptoms. An extensive literature review was conducted in order to determine the incidence of femoroacetabular impingement reported in international literature and all related to the clinical and radiological diagnosis and treatment of this condition. Femoroacetabular impingement is a major cause of hip pain in adult and osteoarthritis; hip arthroscopy is taking an increasingly prominent role in the treatment of this condition(AU)

Pinzamiento femoroacetabular, causa de dolor en la cadera en el adulto joven / Femoroacetabular impingement causing hip pain in young adults / Le pincement fémoro-acétabulaire à l'origine de la douleur aux hanches chez le sujet jeune

El dolor de la cadera en adultos ha sido tradicionalmente asociado con osteoartritis en dicha articulación. Sin embargo, vemos a muchos pacientes jóvenes con dolor en la cadera, sin artritis, en nuestras consultas. Recientemente, un anormal contacto entre el acetábulo y la unión de cabeza-cuello femoral, conocido como síndrome de pinzamiento femoroacetabular se ha reconocido como una causa preartrítica relativamente común de estos síntomas. Se realizó una amplia revisión bibliográfica con la finalidad de conocer la incidencia de pinzamiento femoroacetabular reportada en la literatura internacional así como todo lo relacionado con el diagnóstico clínico-radiológico y el tratamiento de esta afección. El pinzamiento femoroacetabular es una de las principales causas de dolor en la cadera del adulto joven así como de osteoartritis; la artroscopia de cadera va tomando un papel cada vez más preponderante en el tratamiento de esta afección.

Hip pain in adults has traditionally been associated with osteoarthritis in that joint. However, in our consultations we see many young patients with hip pain, with no arthritis. Recently, an abnormal contact between the acetabulum and the femoral head-neck union, known as femoroacetabular impingement syndrome has been recognized as a relatively common pre-arthritis cause of these symptoms. An extensive literature review was conducted in order to determine the incidence of femoroacetabular impingement reported in international literature and all related to the clinical and radiological diagnosis and treatment of this condition. Femoroacetabular impingement is a major cause of hip pain in adult and osteoarthritis; hip arthroscopy is taking an increasingly prominent role in the treatment of this condition.

Chez les adultes, la douleur de hanche a été d’habitude associée à une ostéoarthrite de cette dite articulation. Néanmoins, on peut voir dans nos cabinets pas mal de jeunes patients souffrant d’une douleur de hanche, sans arthrite. Un contact anormal entre l’acétabulum et la jonction tête et col du fémur, aussi appelé conflit fémoro-acétabulaire, a été récemment décrit comme une cause pré-arthritique relativement commune de ces symptômes. Une large analyse bibliographique a été réalisée afin de connaître l’incidence du conflit fémoro-acétabulaire rapportée dans la littérature internationale, ainsi que tout ce qui est en relation avec le diagnostic clinique et radiologique et le traitement de ce trouble. Le pincement fémoro-acétabulaire est l’une des principales causes de douleur de hanche, ainsi que d’ostéoarthrite, chez le sujet jeune; l’arthroscopie joue un rôle de plus en plus prépondérant dans le traitement de cette affection.

Abordagem extracapsular para tratamento artroscópico de impacto femoroacetabular: resultados clínicos, radiográficos e complicações / Extracapsular approach for arthroscopic treatment of femoroacetabular impingement: clinical and radiographic results and complications

Avaliar os resultados clínicos e radiográficos e as complicações relativos a pacientes submetidos a tratamento artroscópico de impacto femoroacetabular com o uso da abordagem extracapsular. MÉTODOS: Entre janeiro de 2011 e março de 2012, 49 pacientes (50 quadris) foram submetidos a tratamento artroscópico de impacto femoroacetabular pela Equipe de Cirurgia do Quadril do Hospital Ortopédico de Passo Fundo (RS). Preencheram todos os requisitos necessários para este trabalho 40 pacientes (41 quadris). O seguimento médio foi de 29,1 meses. Os pacientes foram avaliados pelo Harris Hip Score modificado por Byrd (MHHS), Non-Arthritic Hip Score (NAHS) e quanto à rotação interna do quadril. Também foram avaliados radiograficamente. Aferiu-se o ângulo CE, a dimensão do espaço articular, o ângulo alfa, o índice colo-cabeça, o grau de artrose e a presença de ossificação heterotópica do quadril. RESULTADOS: Dos 41 quadris tratados, 31 (75,6%) apresentaram resultados clínicos bons ou excelentes. Observou-se um aumento médio pós-operatório de 22,1 pontos para o MHHS, 21,5 para o NAHS e 16,4° na rotação interna do quadril (p < 0,001). Quanto à avaliação radiográfica, observou-se correção para índices considerados normais do ângulo alfa e índice colo-cabeça, com diminuição média de 32,9oe aumento médio pós-operatório de 0,10, respectivamente (p < 0,001). CONCLUSÃO: O tratamento artroscópico do impacto femoroacetabular com o uso da abordagem extracapsular apresentou resultados clínicos e radiográficos satisfatórios em seguimento médio de 29,1 meses, com poucas complicações.

To evaluate the clinical and radiographic results and complications relating to patients undergoing arthroscopic treatment for femoroacetabular impingement by means of an extracapsular approach. METHODS: Between January 2011 and March 2012, 49 patients (50 hips) underwent arthroscopic treatment for femoroacetabular impingement, performed by the hip surgery team of the Orthopedic Hospital of Passo Fundo, Rio Grande do Sul. Forty patients (41 hips) fulfilled all the requirements for this study. The mean follow-up was 29.1 months. The patients were assessed clinically by means of the Harris Hip score, as modified by Byrd (MHHS), the Non-Arthritic Hip score (NAHS) and the internal rotation of the hip. Their hips were also evaluated radiographically, with measurement of the CE angle, dimensions of the joint space, alpha angle, neck-head index, degree of arthrosis and presence of heterotopic ossification of the hip. RESULTS: Out of the 41 hips treated, 31 (75.6%) presented good or excellent clinical results. There was a mean postoperative increase of 22.1 points for the MHHS, 21.5 for the NAHS and 16.4° for the internal rotation of the hip ( p< 0.001). Regarding the radiographic evaluation, correction to normal values was observed for the alpha angle and neck-head index, with a mean postoperative decrease of 32.9° and mean increase of 0.10, respectively ( p< 0.001). CONCLUSION: Arthroscopic treatment of femoroacetabular impingement by means of an extracapsular approach presented satisfactory clinical and radiographic results over a mean follow-up of 29.1 months, with few complications.

Pinzamiento extraarticular de cadera: Reporte de caso / Extraarticular hip impingement: Case report

El pinzamiento femoroacetabular corresponde al contacto mecánico entre el fémur y la pelvis, frecuentemente entre el cuello del fémur y el borde acetabular, ya sea por deformidad del primero (CAM) o del segundo (PINCER);1,2 sin embargo, existen causas extraarticulares de pinzamiento.3,4 A la par del aumento en el diagnóstico de pinzamiento se ha hecho cada vez más frecuente el tratamiento artroscópico de éste siendo hoy el estándar de tratamiento.5 En este reporte se analiza un caso de pinzamiento de cadera extraarticular, causado por un contacto entre el fémur y una espina ilíaca antero inferior (EIAI) prominente debido probablemente a una avulsión antigua consolidada, y a su posterior manejo artroscópico.

Femoroacetabular impingement is the mechanical contact between the femur and the pelvis, frequently between the femur neck and the acetabular rim, whether due to a deformity of the former (cam type) or the latter (pincer type).1,2 However, there may be extraarticular causes of impingement.3,4 Together with the increased diagnosis of impingement, arthroscopic treatment is increasingly frequent and has become the standard treatment.5 This report analyzes a case of extraarticular hip impingement caused by contact between the femur and a prominent anteroinferior iliac spine (AIIS), probably due to a healed old avulsion and its later arthroscopic management.

[Extraarticular hip impingement: Case report]. / Pinzamiento extraarticular de cadera. Reporte de caso.

Femoroacetabular impingement is the mechanical contact between the femur and the pelvis, frequently between the femur neck and the acetabular rim, whether due to a deformity of the former (cam type) or the latter (pincer type). However, there may be extraarticular causes of impingement. Together with the increased diagnosis of impingement, arthroscopic treatment is increasingly frequent and has become the standard treatment. This report analyzes a case of extraarticular hip impingement caused by contact between the femur and a prominent anteroinferior iliac spine (AIIS), probably due to a healed old avulsion and its later arthroscopic management.

A review of femoroacetabular impingement and hip arthroscopy in the athlete.

Femoroacetabular impingement (FAI) is increasingly recognized as a pathological condition of the hip in athletes. Although it is not always symptomatic, the bone structure leading to FAI and its associated pathology can result in significant pain and performance decline in athletes. Recognition of athletes with symptomatic FAI is of the utmost importance, as prompt treatment is necessary in order to maintain desired sports activity levels and preserve joint function. This review explores the recent evidence on the evaluation, recognition, and treatment of femoroacetabular impingement, and discusses conservative management, postoperative rehabilitation, and treatment in the pediatric and master athlete populations.