Congenital Abnormalities of the Musculoskeletal System

Congenital musculoskeletal abnormalities affect bones, joints, muscles, tendons or limbs. Early differentiation between flexible positional deformity and fixed structural abnormality is essential because gentle early treatment can prevent disability, whereas forceful manipulation can cause fracture, nerve injury or avascular necrosis.

Safe examination: inspect symmetry and spontaneous movement; palpate gently; compare limb length, pulses, warmth and sensation; never repeatedly force a joint, never “correct” a deformity at the bedside, and investigate pain, swelling, absent movement or suspected fracture urgently.

Causes and Risk Factors

Genetic/chromosomal disorders and skeletal dysplasias.
Abnormal fetal position, oligohydramnios, uterine constraint and multiple pregnancy.
Neuromuscular disease or neural-tube defect causing muscle imbalance.
Vascular disruption, amniotic bands, teratogenic exposure or congenital infection.
Breech presentation and family history increase developmental dysplasia of the hip (DDH) risk.

Initial Assessment

Review antenatal scan, presentation/delivery, family history, maternal illness/medicines and fetal movement.
Observe resting posture, symmetry, digit number, limb length, joint range and spontaneous movement.
Assess skin creases, spine, hips, feet, hands, skull/chest proportions and associated neurological anomalies.
Check distal pulses, capillary refill, warmth and sensation; pain or pseudoparalysis can indicate fracture, infection or nerve injury.
Measure growth carefully and obtain skeletal survey/genetic review when dysplasia or multiple fractures are suspected.

Congenital Talipes Equinovarus (Clubfoot)

True clubfoot is a rigid three-dimensional deformity with cavus (high arch), forefoot adduction, hindfoot varus and ankle equinus. It differs from a flexible positional foot that can be gently brought to neutral.

Assessment

One/both feet turn inward and downward; heel is small and calf may be thin.
Assess flexibility, skin creases, pulses, hips and spine; look for arthrogryposis or neurological disease.
Scoring systems such as Pirani document severity and progress when staff are trained.

Ponseti management

Begin early when medically stable. A trained practitioner performs gentle manipulation and long-leg plaster casting, usually changed weekly, correcting cavus/adduction/varus before equinus.
Most infants require percutaneous Achilles tenotomy under appropriate analgesia/anaesthesia, followed by a final cast.
After correction, a foot-abduction brace is worn full-time initially then during sleep for several years according to programme protocol. Bracing prevents relapse; it does not create the correction.
Relapse is recognised by loss of dorsiflexion, recurrent inward turning or difficulty fitting brace and requires early review, sometimes repeat casting/tenotomy or tendon transfer.

Cast and brace nursing care

Check toes for colour, warmth, swelling, movement and capillary refill soon after casting and at every contact.
Keep cast dry/clean; do not insert objects or powder. Escalate severe crying, foul smell, fever, cold/blue/swollen toes or a slipped/cracked cast.
Teach correct heel placement in brace and protect skin; never stop bracing simply because the foot looks normal.

Developmental Dysplasia of the Hip

DDH ranges from shallow acetabulum to subluxatable, dislocated or irreducible hip. Early treatment allows normal development; late diagnosis leads to limping, pain, complex surgery and early osteoarthritis.

Risk and recognition

Breech presentation, first-degree family history, female sex, oligohydramnios and associated foot deformity/torticollis.
Trained newborn examination uses Ortolani/Barlow manoeuvres gently; do not repeat forcefully. Later signs include limited hip abduction, unequal leg length/creases and Galeazzi sign.
Normal newborn examination does not end surveillance; recheck hips at child visits until walking.

Investigations and management

Ultrasound assesses young infant hips and radiography becomes useful after ossification. Refer abnormal/unstable hips and high-risk infants according to screening schedule. A Pavlik harness holds hips flexed/abducted while permitting movement; it must be fitted and adjusted by specialists. Failure or late presentation may require closed reduction and hip spica, open reduction or pelvic/femoral surgery.

Harness/spica care

Do not alter straps unless instructed. Check skin, femoral nerve function and foot circulation; dress under straps as taught.
Use wide nappies without forcing hips together; avoid tight swaddling with legs straight/adducted.
With a spica cast protect edges, keep dry, reposition safely and inspect toes/skin; teach car-seat/transport plan.

Limb Deficiency and Amniotic-Band Sequence

Limb-reduction defects include absence or underdevelopment of part/all of a limb. Amniotic bands may constrict digits/limbs, causing distal swelling, impaired circulation or amputation.

Management

Urgently assess colour, warmth, capillary refill and swelling distal to a constriction; threatened circulation requires immediate plastic/orthopaedic surgery.
Obtain radiographs and screen other systems/genetic causes when indicated.
Protect the residual limb, maintain joint range and promote age-appropriate development.
Multidisciplinary rehabilitation includes occupational/physiotherapy, prosthetic assessment when useful, reconstructive surgery and family psychosocial support. Emphasise ability and independence rather than stigma.

Polydactyly and Syndactyly

Polydactyly is an extra digit; syndactyly is fusion of digits. Document bone/nail content and function and assess family/syndromic features. Do not tie off an extra digit routinely: a broad base may contain bone, vessels or nerves and ligation can cause bleeding, infection or painful neuroma. Refer for planned surgical assessment. Complex syndactyly is separated at a timing chosen to preserve growth and function, with meticulous postoperative dressing and circulation checks.

Arthrogryposis Multiplex Congenita

Arthrogryposis describes multiple congenital joint contractures resulting from reduced fetal movement; it is a sign with many neurological, muscular, connective-tissue and environmental causes.

Care

Assess airway, swallowing, respiratory muscle function, spine, hips and neurological status.
Investigate cause through neurology/genetics and targeted imaging/laboratory tests.
Begin gentle physiotherapy, stretching and splinting early under therapists; never force joints.
Serial casting and selective tendon/joint surgery improve useful position. Goals prioritise feeding, sitting, hand function, mobility and independence.

Osteogenesis Imperfecta and Skeletal Dysplasia

Osteogenesis imperfecta causes fragile bones from collagen abnormality. Clues include antenatal/birth fractures, bowed limbs, blue/grey sclerae, family history, hearing/dental problems. Severe skeletal dysplasias may cause short limbs, narrow chest and respiratory failure.

Immediate and ongoing management

Handle with broad support under head, trunk and buttocks; avoid pulling limbs, twisting, tight BP cuffs and rectal temperatures.
Investigate fractures with minimal transfers; provide analgesia and orthopaedic stabilisation. Consider safeguarding differentials objectively without assuming abuse or assuming every fracture is genetic.
Assess respiration because rib fractures/small thorax can be life-threatening.
Genetic confirmation/counselling, physiotherapy, mobility aids, fracture prevention and specialist bisphosphonate treatment may be indicated.

Congenital Muscular Torticollis

Shortening/injury of sternocleidomastoid causes head tilt toward affected side with chin turned away; a firm muscle swelling may appear. Exclude cervical-spine, ocular and neurological causes and check for DDH. Treat early with therapist-taught positioning, supervised stretching and tummy time; persistent cases may need botulinum toxin or surgery. Alternate head position and monitor plagiocephaly while following safe-sleep guidance.

Spinal Deformities and Congenital Scoliosis

Vertebral formation/segmentation defects can cause progressive scoliosis and may coexist with renal, cardiac or spinal-cord abnormalities. Examine skin markers and neurology; obtain radiographs/MRI and renal/cardiac screening as directed. Observation, bracing (limited for structural curves), growth-friendly surgery or fusion depends on progression, respiratory impact and growth.

Detailed Nursing Management

Priority	Specific action	Rationale
Neurovascular safety	Before/after cast, splint or surgery assess colour, warmth, pulses, capillary refill, swelling, movement, sensation and pain.	Detects constriction, compartment syndrome or nerve injury early.
Skin integrity	Inspect cast edges, brace straps, pressure areas and insensate skin; keep devices dry and correctly fitted.	Infant skin breaks down rapidly beneath devices.
Pain	Use neonatal/paediatric pain scale, administer prescribed analgesia and reassess.	Pain may signal fracture or neurovascular compromise, not merely device adjustment.
Position/mobility	Support alignment, reposition, perform only prescribed exercises and encourage age-appropriate movement.	Prevents contracture/pressure injury while protecting fragile structures.
Cast care education	Teach red flags, clinic schedule and why parents must not cut/remove/modify casts or braces.	Continuity is essential for correction and relapse prevention.
Growth/development	Monitor feeding, weight, milestones and participation; coordinate rehabilitation and adaptive equipment.	Function and inclusion are primary outcomes, not appearance alone.
Psychosocial care	Use non-stigmatising language, support bonding and connect family with rehabilitation/community resources.	Reduces abandonment, distress and disability-related exclusion.

Complications

Relapse or incomplete correction, avascular necrosis of femoral head, stiffness and early arthritis.
Pressure ulcers, cast burns, nerve palsy, vascular compromise and compartment syndrome.
Fractures, chronic pain, respiratory restriction and reduced mobility.
Developmental delay secondary to limited movement, school/social exclusion and caregiver burden.

Prevention and Follow-up

Many anomalies are not fully preventable. Promote antenatal care, nutrition, diabetes/infection control, avoidance of teratogens and appropriate screening. Prevent secondary disability through systematic newborn examination, timely referral, safe swaddling, early Ponseti/DDH treatment, correct device use, rehabilitation and inclusive family/community support. Follow-up continues through growth because relapse and new functional needs occur.

Revision Questions

Differentiate positional foot deformity from true clubfoot and explain Ponseti treatment.
Describe DDH risk factors, screening and harness nursing care.
Outline management of limb deficiency and amniotic-band constriction.
Explain safe handling of an infant with suspected osteogenesis imperfecta.
Develop a nursing care plan for an infant in serial casts.

References

Manipulation, casting, tenotomy, harness adjustment, bisphosphonate therapy and surgery require trained specialist assessment and current local protocols.