Developmental dysplasia of the hip


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Developmental dysplasia of the hip

Musculoskeletal system

Pediatric musculoskeletal conditions

Radial head subluxation (Nursemaid elbow)

Developmental dysplasia of the hip

Legg-Calve-Perthes disease

Slipped capital femoral epiphysis

Transient synovitis

Osgood-Schlatter disease (traction apophysitis)

Musculoskeletal injuries and trauma

Rotator cuff tear

Dislocated shoulder

Radial head subluxation (Nursemaid elbow)

Winged scapula

Thoracic outlet syndrome

Carpal tunnel syndrome

Ulnar claw

Erb-Duchenne palsy

Klumpke paralysis

Iliotibial band syndrome

Unhappy triad

Anterior cruciate ligament injury

Patellar tendon rupture

Meniscus tear

Patellofemoral pain syndrome

Sprained ankle

Achilles tendon rupture



Degenerative disc disease

Spinal disc herniation


Compartment syndrome


Bone disorders

Osteogenesis imperfecta


Pectus excavatum


Genu valgum

Genu varum

Pigeon toe

Flat feet

Club foot

Cleidocranial dysplasia



Bone tumors




Osteomalacia and rickets


Paget disease of bone


Lordosis, kyphosis, and scoliosis

Joint disorders



Spinal stenosis

Rheumatoid arthritis

Juvenile idiopathic arthritis


Calcium pyrophosphate deposition disease (pseudogout)

Psoriatic arthritis

Ankylosing spondylitis

Reactive arthritis


Septic arthritis


Baker cyst

Muscular disorders

Muscular dystrophy



Inclusion body myopathy

Polymyalgia rheumatica



Neuromuscular junction disorders

Myasthenia gravis

Lambert-Eaton myasthenic syndrome

Other autoimmune disorders

Sjogren syndrome

Systemic lupus erythematosus

Mixed connective tissue disease

Antiphospholipid syndrome

Raynaud phenomenon


Limited systemic sclerosis (CREST syndrome)

Musculoskeletal system pathology review

Back pain: Pathology review

Rheumatoid arthritis and osteoarthritis: Pathology review

Seronegative and septic arthritis: Pathology review

Gout and pseudogout: Pathology review

Systemic lupus erythematosus (SLE): Pathology review

Scleroderma: Pathology review

Sjogren syndrome: Pathology review

Bone disorders: Pathology review

Bone tumors: Pathology review

Myalgias and myositis: Pathology review

Neuromuscular junction disorders: Pathology review

Muscular dystrophies and mitochondrial myopathies: Pathology review


Developmental dysplasia of the hip


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High Yield Notes

13 pages


Developmental dysplasia of the hip

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External Links


Content Reviewers

Rishi Desai, MD, MPH


Elizabeth Nixon-Shapiro, MSMI, CMI

Evode Iradufasha, MD

Marisa Pedron

Evan Debevec-McKenney

Congenital hip dysplasia, or developmental dysplasia of the hip, is a problem where the socket or acetabulum - and the femoral head are misaligned, resulting in an unstable hip joint.

Typically, the problem is present at birth, but sometimes it appears later as the bones develop over time.

The hip joint is a ball and socket type because the ball-shaped head of the femur sits and rotates within the acetabulum which is a cup-shaped socket.

The hip joint is supported by a tough fibrous joint capsule, which is made up of three main ligaments, the iliofemoral, the pubofemoral, and the ischiofemoral.

The main job of the joint capsule is to hold articulating bones together and make sure the joint stays stable when the hip is moving.

Now, the acetabulum itself is a combination of parts of three pelvic bones that join together - the ischium, the ileum, and the pubis.

At the bottom of the acetabulum known as the acetabular fossa, arises a ligament, called the ligamentum teres that attaches to the fovea capitis, which is a depression found on the tip of the femoral head.

This ligament helps with joint stability especially during hip flexion and abduction.

Now, the edge of the acetabulum has a thick bony circular rim covered by a ring of cartilage known as the acetabular labrum.

At its lower end, there’s a depression called the acetabular notch, which is covered by the transverse ligament which fills the gap within the circumference of the acetabulum.


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  2. "Harrison's Principles of Internal Medicine, Twentieth Edition (Vol.1 & Vol.2)" McGraw-Hill Education / Medical (2018)
  3. "Pathophysiology of Disease: An Introduction to Clinical Medicine 8E" McGraw-Hill Education / Medical (2018)
  4. "CURRENT Medical Diagnosis and Treatment 2020" McGraw-Hill Education / Medical (2019)
  5. "The Labro-Acetabular Complex" Journal of Bone and Joint Surgery (2011)
  6. "Imaging of the Acetabular Labrum" Magnetic Resonance Imaging Clinics of North America (2005)
  7. "Is ‘Clicky Hip’ a Risk Factor in Developmental Dysplasia of the Hip?" Scottish Medical Journal (2005)

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