Articular hypermobility simulating chronic rheumatic disease

Contrast-enhanced MRI findings of the knee in healthy children; establishing normal values

OBJECTIVES

To define normative standards for the knee in healthy children using contrast-enhanced MRI, focusing on normal synovial membrane thickness. Secondly, presence of joint fluid and bone marrow oedema was evaluated.

METHODS

For this study, children without disorders potentially resulting in (accompanying) arthritis were included. Patients underwent clinical assessments, followed by contrast-enhanced MRI. MRI features were evaluated in consensus using the Juvenile Arthritis MRI Scoring (JAMRIS) system. Additionally, the presence of joint fluid was evaluated. No cartilage lesions or bone abnormalities were observed.

RESULTS

We included 57 healthy children. The overall mean thickness of the normal synovial membrane was 0.4 mm (min-max; 0.0-1.8mm). The synovium was thickest around the cruciate ligaments and retropatellar and suprapatellar regions. The mean overall diameter of the largest pocket of joint fluid was 2.8 mm (min-max; 0.9-8.0mm). Bone marrow changes were observed in three children (all in the apex patellae).

CONCLUSIONS

The normal synovial membrane was maximally 1.8 mm thick, indicating that the JAMRIS cut-off value of 2 mm can be considered a valid measure for evaluating synovial hypertrophy. Some joint fluid and bone marrow changes suggestive of bone marrow oedema in the apex patellae can be seen in healthy children.

KEY POINTS

• Knowledge on the normal synovial appearance using contrast-enhanced MR is lacking. • In healthy children, normal synovial membrane is maximally 1.8 mm thick. • Normal synovium is thickest around the cruciate ligaments, retropatellar and suprapatellar. • Bone marrow oedema in the apex patellae is seen in healthy children.

Hypermobility and the hypermobility syndrome

Hypermobile joints by definition display a range of movement that is considered excessive, taking into consideration the age, gender and ethnic background of the individual. Joint hypermobility, when associated with symptoms is termed the joint hypermobility syndrome or hypermobility syndrome (JHS). JHS is an under recognised and poorly managed multi-systemic, hereditary connective tissue disorder, often resulting in a great deal of pain and suffering. The condition is more prevalent in females, with symptoms frequently commencing in childhood and continuing on into adult life. This paper provides an overview of JHS and suggested clinical guidelines for both the identification and management of the condition, based on research evidence and clinical experience. The Brighton Criteria and a simple 5-point questionnaire developed by Hakim and Grahame, are both valid tools that can be used clinically and for research to identify the condition. Management of JHS frequently includes; education and lifestyle advice, behaviour modification, manual therapy, taping and bracing, electrotherapy, exercise prescription, functional rehabilitation and collaborative working with a range of medical, health and fitness professionals. Progress is often slow and hampered by physical and emotional setbacks. However with a carefully considered management strategy, amelioration of symptoms and independent functional fitness can be achieved.

Hypermobility disorders in children and adolescents

It is well recognized that many if not most children and adolescents attending paediatric rheumatology clinics will have a non-inflammatory origin for their complaints or disorder. Mechanical causes are frequently identified, and hypermobility or ligamentous laxity of joints is increasingly recognized as an aetiological factor in the presentation. Such conditions include 'growing pains', recurrent lower-limb arthralgia, anterior knee pain syndromes, and back pain. Studies of significant cohorts of such patients have now been published supporting the link of ligamentous laxity to particular symptom complexes. However, much disagreement remains as to the validity of hypermobility as an aetiogical factor. What seems clear is that not all hypermobile individuals will be symptomatic or indeed possibly have any risk for specific musculoskeletal disorders in later life. Screening tools such as the Beighton score are likely to be inadequate in many paediatric populations. Along with increasing recognition of these disorders in childhood and adolescence has been the development of a multidisciplinary management approach, which usually involves predominantly allied health professionals such as podiatrists, physiotherapists and occupational therapists. The challenge remains to interpret symptoms correctly as being related to the hypermobility and to predict why such children become symptomatic. The answer is likely to involve physiological and psychosocial factors. In addition, early identification and modification of risk factors may have major implications for subsequent prevalence of many adult medical disorders such as low back pain, chronic pain syndromes and degenerative osteoarthritis.

Relationship of Q angle and joint hypermobility and Q angle values in different positions

Patellar malalignment is the most important reason for anterior knee pain. Patellar alignment is commonly determined by the measurement of the quadriceps (Q) angle. In this study, our primary aim was to investigate the Q angle difference between healthy individuals with and without joint hypermobility. The other objectives were to compare the Q angle values, which were measured in supine and upright positions, to determine hypermobility frequency among healthy males in a certain population, and to investigate the correlation between the existent skeletal deformities and Beighton score levels. Two hundred fifty-three healthy male college students were examined for hypermobility and skeletal deformities. According to the Beighton scoring system, three groups (n=20) were formed, and Q angle measurements were performed on the 60 individuals in both supine and upright positions. In the comparison of the groups, the mean Q angle values in healthy hypermobile individuals were found to be significantly higher than that of the nonhypermobile ones (p<0.05). No statistical difference was found between Q angle values in supine and upright positions (p>0.05). The frequency of joint hypermobility (Beighton score 4 or more) was found to be 29.25% in this population. No correlation was determined between existent skeletal deformities and Beighton score values (p>0.05). In conclusion, the Q angle evaluation among healthy hypermobile individuals may have a prognostic value for probable knee pathologies that may appear in the future.

Joint hypermobility syndrome and mitral valve prolapse in panic disorder

OBJECTIVE

The purpose of this study is to test the association between joint hypermobility syndrome (JHS) and panic disorder (PD) and to determine whether mitral valve prolapse (MVP) modifies or accounts in part for the association.

METHOD

A total of 115 subjects are included in this study in three groups. Group I (n = 42): panic disorder patients with MVP. Group II (n = 35): panic disorder patients without mitral valve prolapse. Group III (n = 38): control subjects who had mitral valve prolapse without any psychiatric illness. Beighton criteria were used to assess joint hypermobility syndrome. Two-dimensional and M-mode echocardiography was performed on each subject to detect mitral valve prolapse.

RESULTS

Joint hypermobility syndrome was found in 59.5% of panic disorder patients with mitral valve prolapse, in 42.9% of patients without mitral valve prolapse and in 52.6% of control subjects. Beighton scores was 4.93 +/- 2.97 in group I, 4.09 +/- 2.33 in group II, and 4.08 +/- 2.34 in group III. There was no significant difference between groups according to Beighton scores.

CONCLUSION

We did not detect a statistically significant relationship between panic disorder and joint hypermobility syndrome. Mitral valve prolapse and joint hypermobility syndrome are known to be etiologically related and we suggest that mitral valve prolapse affects the prevalence of joint hypermobility syndrome in the panic disorder patients.

The prevalence of joint hypermobility among high school students

OBJECTIVE

The aim of this study was to determine the prevalence of joint hypermobility among high school students and to define the characteristics of patients with joint hypermobility.

METHODS

The students underwent complete history and physical examination. In order to designate marfanoid habitus, body weight, height, and span/height and upper/lower segment ratios were recorded. The degree of joint hypermobility was scored by the Beighton scoring system. The following features were also examined: arthralgia, myalgia, low back pain, sciatica, spinal deformities, temporomandibular joint pain and crepitus, effusion, swan neck deformity, arachnodactyly, joint dislocation, joint sprain, Raynaud's phenomenon, stria, varicose veins, abdominal and inguinal hernia, heart disease history, myopia, dropping eyelids, and antimongoloid slant.

RESULTS

Eight hundred sixty-one students (433 females and 428 males) with a mean age of 15.4+/-1.1 years (range 13-19) were examined. Joint hypermobility was observed in 101 (11.7%) of the students. According to the Beighton scoring system, the majority of these (61.4%) were observed to score 4. Our results show that phenotype has no relation with joint mobility. Of the total number of students, there were 31 male (7.2%) and 70 female (16.2%) hypermobile subjects. The difference between sexes was highly significant (P=0.00005). Joint sprain was detected in 14 of hypermobile students (13.9%) and 50 of nonhypermobile students (6.6%). Its presence was the only significant parameter between hypermobile and nonhypermobile students (P=0.0094).

CONCLUSIONS

Joint hypermobility was found in 11.7% of the students in our study, and the results are in harmony with the previous studies on Western populations. Although hypermobility does not seem to be very problematic in young people, as in our focus group, we believe that it is important for physicians to recognize this problem to ensure correct diagnosis and treatment, since it may lead to mimic rheumatic diseases in the future.

Intrarater and Interrater Reliability of the Beighton and Horan Joint Mobility Index

OBJECTIVE: Clinicians may benefit from using a joint mobility index to screen for individuals on the high end of the spectrum of joint laxity (ie, those with generalized joint laxity), which may be associated with musculoskeletal complaints. Reliability of the Beighton and Horan Joint Mobility Index (BHJMI) has not been reported in the literature. Our purpose was to determine intrarater and interrater reliability of (1) composite BHJMI scores (the overall score from 0 to 9), and (2) categorized scores, the BHJMI scores in 3 categories (0 to 2, 3 to 4, and 5 to 9) DESIGN AND SETTING: This was an intrarater and interrater reliability study. Data were collected in an academic physical therapy department and in a high school. SUBJECTS: Forty-two (intrarater) and 36 (interrater) female volunteers, aged 15 to 45 years. MEASUREMENTS: Subjects were screened using the BHJMI. Percentage agreement and the Spearman rho were used to analyze BHJMI composite and category scores. RESULTS: The percentage agreement and the Spearman rho for intrarater and interrater reliability of BHJMI composite scores were 69% and.86 and 51% and.87, respectively. The percentage agreement and the Spearman rho for intrarater and interrater reliability of the category scores were 81% and.81 and 89% and.75, respectively. CONCLUSIONS: Reliability of the BHJMI was good to excellent in screening for generalized joint laxity in females aged 15 to 45 years.

Examination and treatment of a patient with hypermobility syndrome

BACKGROUND AND PURPOSE

The purpose of this case report is to present the patient examination, evaluation/diagnosis/prognosis, intervention, and outcome of a patient with hypermobility syndrome (HMS). Hypermobility syndrome has been widely recognized in the rheumatology literature, but it has seldom been discussed in the orthopedic literature and has only recently been described in the physical therapy literature. The signs and symptoms of HMS are common among patients seen in orthopedic physical therapy clinics; however, the underlying HMS may be overlooked while treating individual joints or tissues causing pain. CSE DESCRIPTION: The patient was a 28-year-old woman with complaints of chronic, multiple-joint pain. After years without a diagnosis, a rheumatologist had recently diagnosed underlying HMS.

OUTCOMES

Following intervention that emphasized patient education and activity modification, the patient's complaints decreased.

DISCUSSION

Recognition of HMS underlying common orthopedic problems may facilitate appropriate patient education and management.

Generalized Joint Hypermobility and Its Relationship to Injury Patterns Among NCAA Lacrosse Players

OBJECTIVE

To prospectively observe and compare injury patterns between hypermobile and nonhypermobile NCAA athletes.

DESIGN AND SETTING

Athletes were screened for generalized joint hypermobility before the 1995 lacrosse season. Injuries were recorded through the end of the postseason and compared in hypermobile and nonhypermobile athletes.

SUBJECTS

A total of 310 male and female volunteers from 17 lacrosse teams participated in the study.

MEASUREMENTS

Hypermobility was evaluated with the technique of Carter and Wilkinson (as modified by Beighton and colleagues), which uses 9 joint measurements to assess global joint mobility. For an athlete to be considered hypermobile, 5/9 of these measurements must have been positive. Next, certified athletic trainers prospectively recorded injuries and hours of practice and game participation on a standard form. After the season, all data forms were returned to us for analysis. Significance was set at P = .05, and x(2) and independent t tests were used to compare injuries between groups.

RESULTS

Twenty of 147 men (13.6%) and 54 of 163 women (33.1%) were hypermobile, yielding an overall hypermobility prevalence of 23.8%. One hundred athletes sustained 134 injuries. There were no significant differences in overall injury rate among hypermobile (2.29/1000 hours) compared with nonhypermobile (3.54/1000 hours) athletes. Nonhypermobile athletes suffered contact injuries at a higher rate (1.38/1000 hours) than hypermobile athletes (0.52/1000 hours). Hypermobile athletes showed an increased rate of ankle injuries, and nonhypermobile athletes showed a trend toward an increased rate of strains. Multiple approaches to analysis of the data revealed no other significant findings.

CONCLUSIONS

There was no difference in overall injury rates between hypermobile and nonhypermobile athletes in this sample. This finding is somewhat surprising in light of significant evidence that hypermobility appears to be a factor in joint complaints among nonathletes. Additional research is needed to clearly determine whether a relationship exists between hypermobility and injury rates among athletes.

Temporomandibular joint dysfunction. Connective tissue variations in skin biopsy and mitral valve function

Ten women with temporomandibular joint dysfunction and general joint hypermobility (score, 4 to 8) and 10 symptom-free female volunteers without systemic laxity (score, 0 to 2) were selected for the study. A biopsy of connective tissue from arm skin found that the total collagen concentrations were lower and the proteoglycan values were higher in the hypermobile TMJ patients than in the control subjects. The mitral region of the heart was inspected by echocardiography. Eight patients and four controls had slightly abnormal echocardiographic findings. Two patients fulfilled the criteria for mitral valve prolapse. The patients had significantly more musculoskeletal complaints than did the controls. The study suggests an association between joint hypermobility, abnormal skin connective tissue composition, mitral valve malfunction, and musculoskeletal disorders in young women with TMJ dysfunction, especially internal derangement.

Joint hypermobility in adults referred to rheumatology clinics

Joint hypermobility is a rarely recognised aetiology for focal or diffuse musculoskeletal symptoms. To assess the occurrence and importance of joint hypermobility in adult patients referred to a rheumatologist, we prospectively evaluated 130 consecutive new patients for joint hypermobility. Twenty women (15%) had joint hypermobility at three or more locations (greater than or equal to 5 points on a 9 point scale). Most patients with joint hypermobility had common musculoskeletal problems as the reason for referral. Two patients referred with a diagnosis of rheumatoid arthritis were correctly reassigned a diagnosis of hypermobility syndrome. Three patients with systemic lupus erythematosus had diffuse joint hypermobility. There was a statistically significant association between diffuse joint hypermobility and osteoarthritis. Most patients (65%) had first degree family members with a history of joint hypermobility. These results show that joint hypermobility is common, familial, found in association with common rheumatic disorders, and statistically associated with osteoarthritis. The findings support the hypothesis that joint hypermobility predisposes to musculoskeletal disorders, especially osteoarthritis.

Is the benign joint hypermobility syndrome benign?

Over a period of two years, joint hypermobility was identified in 95 female and 19 male patients who attended rheumatology and rehabilitation units in Ismailia city. Pauciarticular pains referring to large and medium-sized joints was their most frequent complaint. Clinical diagnosis of carpal and/or tarsal tunnel syndromes was made in 45.6% of patients, and various forms of soft tissue rheumatism were evident in 73% of them. On radiologic evaluation of the involved joints, 60.5% of the examined patients showed significant degenerative lesions. The most prominent finding in the study, however, was the aggregation of varieties of articular and extra-articular abnormalities in the same patient. Extra-articular features included high frequencies of occurrence of varicose veins, piles and uterine prolapse among other abnormalities. Thus, results of the study lend support to the view that joint hypermobility predisposes to several articular and nonarticular lesions raise serious questions about the reputable benignity of the syndrome.

Hypermobility of the joints in juvenile episodic arthritis/arthralgia

It has been suggested that hypermobility of the joints may predispose children to the development of arthritis or arthralgia. To determine the normal frequency of hypermobility, 260 normal schoolchildren (5 to 17 years of age) were examined. In addition, 34 patients with juvenile rheumatoid arthritis (JRA) and 32 children with juvenile episodic arthritis/arthralgia (JEA) were tested. Any child who met at least three of the following criteria was considered to have joint hypermobility: (1) passive apposition of the thumbs to the flexor aspect of the forearms; (2) passive hyperextension of the fingers so that they lie parallel with the extensor aspect of the forearms; (3) hyperextension of the elbows greater than 10 degrees; (4) hyperextension of the knees greater than 10 degrees; (5) flexion of the trunk with knees extended so the palms rest on the floor. Thirty-two (12%) of 260 normal schoolchildren and 21 (66%) of 32 with JEA had hypermobility. Further, a significantly higher proportion (23 of 126) of normal girls than normal boys (nine of 134) had hypermobility (chi 2 = 8.0, P less than 0.005). Hypermobility was not common in children with JRA. These findings support the hypothesis that hypermobility may be an important factor in the cause of JEA.