Publications by authors named "Hend Riahi"

Study Design: Cross-sectional Cohort Study.

Objective: To determine the cervicothoracic inflection point in an asymptomatic, adult population.

Introduction: The cervicothoracic inflection point (CTIP) is an important sagittal marker to understand for patients with cervical deformities.

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Musculoskeletal hydatid disease is rare and can be located anywhere but most commonly the bone and muscles of the spine, pelvis, then the lower limbs. Imaging is essential for its diagnosis, performing the pre-therapeutic assessment, guiding possible percutaneous treatments, and providing post-therapeutic follow-up. Musculoskeletal hydatidosis can take several forms that may suggest other infections and tumors or pseudotumors.

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Study Design: Cross-sectional cohort study.

Objective: To classify spinal morphology using the "current" and "theoretical" Roussouly systems and assess sagittal alignment in an asymptomatic cohort.

Methods: 467 asymptomatic volunteers were recruited from 5 countries.

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Article Synopsis
  • The study aimed to evaluate the distribution of GAP scores among a diverse group of healthy volunteers and assess spinal shape differences based on alignment categories, age, and geography.
  • The research involved 467 asymptomatic participants from five countries, measuring various spinal parameters through advanced imaging techniques.
  • The findings indicated significant age-related differences in spinal alignment, with older individuals showing a higher rate of severe disproportionality and notable differences in key spinal metrics compared to younger participants.
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Introduction And Importance: Quadriceps palsy is a sign of femoral nerve injury. Classically it is a compression of the nerve by a haematoma of the iliopsoas muscle in haemophiliacs and patients on anticoagulants. Could this haematoma form after a trauma in a healthy athlete?

Case Presentation: We report a case of 16-year-old kickboxer with no previous history who had been complaining of the left groin for 3 weeks after being struck in the left iliac fossa.

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Study Design: Prospective, cross-sectional study.

Objective: In a geographically diverse population of asymptomatic volunteers, we sought to report the incidence of pelvic obliquity (PO), establish normative values of PO across patient factors, and assess the correlation of PO with radiographic parameters.

Summary Of Background Data: PO is defined as the misalignment of the pelvis and can be assessed through several anatomic landmarks.

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Key Clinical Message: The diagnosis of Sneddon Syndrome should be considered in adults with young-onset dementia accompanied by neuropsychiatric signs and livedo racemosa. Magnetic resonance imaging and cerebral angiography are essential. A cutaneous biopsy may help in the diagnosis.

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Objective: To define a novel radiographic measurement, the posterior cranial vertical line (PCVL), in an asymptomatic adult population to better understand global sagittal alignment.

Methods: We performed a multicenter retrospective review of prospectively collected radiographic data on asymptomatic volunteers aged 20-79. The PCVL is a vertical plumb line drawn from the posterior-most aspect of the occiput.

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Study Design: Prospective cohort study.

Objectives: To show population variance in the Inflection Point (IP) and its role in defining maximum Thoracic Kyphosis (TK) and Lumbar Lordosis (LL).

Methods: 468 asymptomatic adult volunteers were included in the Multi-Ethnic Normative Alignment Study (MEANS).

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Background Context: Current definition of lumbar lordosis uses the L1-S1 angle. Prevailing classification of sagittal spinal morphology, derived from a young adult population, classifies the spine into four subtypes defined by their sacral slope (SS) and curve morphology.

Purpose: To describe physiological sagittal alignment of the lumbar spine across age groups using three main parameters that dictate the lumbar curve: angular magnitude, span, and apex.

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Purpose: Assess normative values of sagittal spinal and lower extremity alignment in asymptomatic volunteers of three difference races.

Methods: Asymptomatic volunteers between the ages of 18-80 years were enrolled prospectively and then analyzed retrospectively from six different centers. Volunteers included reported no significant neck or back pain, nor any known spinal disorder(s).

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Objective: The purpose of this study was to assess the performance of computed tomography (CT) scan and magnetic resonance imaging (MRI) for detecting sacroiliitis in nonradiographic SpA (nr-SpA).

Methods: This cross-sectional monocentric double-blind study included 63 patients consulting for symptoms suggestive of SpA between February 2014 and February 2017. Patients with conventional radiographs showing a confirmed sacroiliitis (grade 3 or 4) were not included.

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Article Synopsis
  • A prospective study examined the lumbar shape and sagittal parameters in 468 asymptomatic volunteers aged 18 to 80 from 5 countries.
  • Moderate correlations were found between pelvic incidence (PI) and proximal lumbar lordosis (pLL), as well as between thoracic kyphosis and the lumbar parameters.
  • The study revealed a clear distinction in mean PI based on lumbar apex levels, with lower PI linked to an apex at L4 and higher PI associated with L3.
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Sarcoidosis is a multisystem disease of unknown origin. Diagnosis remains challenging, based on organ site involvement, histological confirmation of non-caseating granuloma and an appropriate clinical syndrome. Granulomatous bone involvement is rare and may be ignored because it is usually asymptomatic.

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Objective: The role of the craniocervical complex in spinal sagittal alignment has rarely been analyzed but it may play a fundamental role in postoperative mechanical complications. The aim of the study is to analyze the normative value of the cervical inclination angle (CIA) in an adult asymptomatic multiethnic population.

Methods: Standing full-spine EOS of adult asymptomatic volunteers from 5 different countries were analyzed.

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Article Synopsis
  • The study is a cross-sectional cohort aimed at understanding sagittal plane alignment and balance in asymptomatic adults from various countries.
  • It challenges existing sagittal alignment guidelines, showing they were based on data from spinal deformity patients, making them less applicable to the general population.
  • The results identified four key parameters that can help define normal spinal alignment in healthy individuals, ultimately improving surgical outcomes.
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Study Design: Multicenter Cohort.

Objective: Assess normative values of sagittal spinal and lower extremity alignment in asymptomatic volunteers stratified by age and gender.

Summary Of Background Data: Our understanding of ideal sagittal alignment is still evolving.

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Background: Spinal alignment can have a significant impact on a patient's overall quality of life. Predicting the ideal sagittal spinal alignment of a specific individual is still a difficult task. The Multi-Ethnic Alignment Normative Study (MEANS) investigated skeletal alignment, including the spine and lower extremities, of the largest multi-ethnic cohort of asymptomatic adult volunteers.

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Purpose: Previous studies on adults with degenerative scoliosis (ADS) have been fixed the threshold of PI-LL mismatch less than 10° for achieving good clinical outcomes. Recent studies discussed that PI-LL mismatch should consider individual pelvic incidence (PI) and should be set first in a normal population. The purpose of this study is to assess the variability of PI-LL mismatch according to PI in an asymptomatic population.

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Background: The purpose of this study was to investigate the affecting factors on pelvic incidence (PI) and to test the hypothesis that PI changes even after skeletal maturity probably due to hypermobility of the sacroiliac joint using a large international multi-center database.

Methods: A prospective and cross-sectional healthy adult volunteers, ages 18-80 years, across 5 countries were used. Radiographic measurements included standard whole body alignment parameters.

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Introduction: Tuberculous Spondylodiscitis is the most common form of musculoskeletal tuberculosis. Molecular techniques on fresh tissues are proved to improve the diagnosis of tuberculous spondylodiscitis and to allow a rapid diagnosis to initiate the treatment and prevent neurological complications.

Objectives: The objective of the present study was to assess the diagnostic performances of single tube nested PCR and GeneXpert ultra in the diagnosis of tuberculous spondylodiscitis on formalin fixed paraffin embedded tissues.

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Purpose: In a population of asymptomatic volunteers across 5 countries, we sought to: (a) establish normative values of the Odontoid-Central Sacral Vertical Line (OD-CSVL) across patient factors, and (b) assess correlations of OD-CSVL with other radiographic parameters.

Methods: A prospective, cross-sectional study of asymptomatic adult volunteers, ages 18-80 years, were enrolled across 5 countries (France, Japan, Singapore, Tunisia, United States) forming the Multi-Ethnic Alignment Normative Study (MEANS) cohort. Included volunteers had no known spinal disorder(s), no significant neck/back pain (VAS ≤ 2; ODI ≤ 20), and no significant scoliosis (Cobb ≤ 20°).

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Longstanding osteomalacia, by its proliferative enthesopathic changes, may mimic the advanced features of SpA. Despite the typical radiological findings, the lack of response to anti-TNF should encourage clinicians to reconsider the diagnosis.

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Introduction: The integration of new technologies in the classrooms opens new possibilities for the teaching and learning process. Technologies such as student response system (Clicker). The benefits of using a student feedback system are highlighted in literature.

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