Misalignments of the femur or pelvis

Anatomy: How the hip, femur and pelvis work together

The hip is a ball-and-socket joint between the acetabulum in the pelvis and the femoral head at the top of the femur. Shape, orientation and angle determine how evenly forces are transferred - when standing, walking, running or playing sports.

• CCD angle (collum caput diaphysis): describes the inclination of the femoral neck to the shaft (normal approx. 125–135°).
• Femoral torsion/anteversion: rotational position of the femur in the longitudinal axis (approx. 10–20° in adults).
• CE angle (Wiberg) and roof inclination (Tönnis): measure the roofing of the femoral head by the socket.

If these parameters are not correct, we speak of a misalignment or deformity. This can lead to incorrect strain – on the hip itself, but also on the knee, in the pelvic ring or in the lumbar spine.

What are misalignments of the femur or pelvis?

By misalignment we mean deviations from the normal alignment or shape of the bony structures. They can occur frontally (e.g. varus/valgus), sagittally (flexion/extension misalignment) or rotationally (torsion deviation). In the pelvis, they affect the socket alignment (over or under the roof), the pelvic tilt or the pelvic tilt angle.

• Femur: Coxa vara/valga (changed CCD angle), derotation/rotation error (excessive anteversion or retroversion), post-traumatic axial deviations.
• Pelvis/Acetabular: Hip dysplasia (underroofing), retro/anteversion of the socket, femoroacetabular impingement morphologies (cam/pincer components), pelvic obliquity.
• Accompanying: functional or structural leg length difference.

Not every deviation is automatically pathological. The decisive factors are discomfort, functional limitations and the strain on the articular cartilage.

Causes and common forms

Deformities can be congenital, developmental, acquired or post-traumatic. Muscular imbalances and poor posture also play a role by reinforcing existing bony peculiarities.

• Congenital/Developmental: Hip dysplasia, increased femoral anteversion in adolescence, less frequently growth disorders.
• Post-traumatic: fractures that have healed in a misalignment (malunion), consequences of dislocations or epiphyseal injuries.
• Overload and sport: repetitive strain with muscular imbalances that trigger problems with borderline anatomy.
• Neuromuscular: altered muscle tension and guidance (e.g. after neurological events) with secondary axial deviation.
• Previous operations: changed biomechanics after osteosynthesis or conversion operations.

Relevant special forms include: the femoral derotation problem (too much or too little anteversion), coxa vara/valga and socket misalignments in dysplasia. They can occur in isolation or in combination.

Complaints: How can you recognize a misalignment?

• Hip pain in the groin, side above the trochanter or in the buttocks
• Stress-dependent pain when walking, running, climbing stairs, sitting for long periods
• Feeling of instability or buckling, reduced performance in sports
• Knee problems (especially front knee pain) due to changed leg axis
• Pelvic tilt, gait changes, increased internal/external rotation
• Mechanical symptoms: rubbing, snapping, pinching sensation

If left untreated, chronic complaints and premature cartilage wear can occur. A timely clarification helps to take targeted countermeasures.

Warning signs: When should you seek medical advice quickly?

• Acute pain and inability to bear weight after injury
• Severe swelling, redness, fever
• Neurological symptoms (numbness, signs of paralysis)
• Significantly increasing or nocturnal pain

Diagnostics: structured and radiation-aware

We start with a detailed medical history and physical examination. We pay attention to gait, leg axis, pelvic position, mobility and muscular control.

• Inspection: Pelvic stance, leg length, foot progression angle, abduction/adduction deficits
• Function: Trendelenburg sign, standing and walking tests, core and hip abductor strength
• Provocation tests: e.g. B. FADIR/FABER if intra-articular irritation is suspected

Imaging is used specifically to measure relevant parameters and avoid overtreatment.

• X-ray pelvis a.–p. when stationary, if necessary faux profile: assessment of CE angle, roof pitch, pan version
• Full-leg position: leg axis, pelvic obliquity, leg length
• CT torsion analysis: if relevant femoral or tibial torsion deviation is suspected
• MRI: assessment of cartilage, labrum and associated pathologies
• Sonography: soft tissues near the joints, injection navigation

Not every measurement deviation requires surgery. Findings are always discussed in the context of your symptoms, goals and activity requirements.

Conservative therapy: improve function first

The primary goal is to relieve pain, improve hip centering and reduce overload. In many cases, very good everyday and sports function can be achieved in this way.

The program is individually tailored. A realistic therapy attempt usually includes 8–12 weeks of structured training with reevaluation.

Injections and regenerative options: targeted and indication-based

In certain situations, additional injection therapy can be useful - for example, in the case of inflammatory irritation of the bursa, tendon attachments or symptomatic joint irritation.

• Corticoid injections: short-term anti-inflammatory, e.g. B. in trochanteric bursitis; economical and under ultrasound control.
• Hyaluronic acid: option for hip osteoarthritis to relieve symptoms; the evidence is heterogeneous, the decision is made jointly after informed consent.
• PRP (autologous conditioned plasma): can help reduce pain in certain tendinopathies or early osteoarthritis; Data in the hip is growing but remains mixed.

Regenerative procedures do not replace the correction of severe bony misalignments. However, they can modulate symptoms and support conservative therapy. Risks and benefits are weighed individually.

Operational options – when do they make sense?

Surgery is considered if, after adequate conservative attempts, a structurally relevant deformity continues to cause significant limitation or threatens joint health. The decision is individual and takes into account age, activity, goals and comorbidities.

• Femoral corrective osteotomy: Varization/valgization or derotation osteotomy for coxa vara/valga or torsion deviations.
• Periacetabular osteotomy (PAO): Conversion of the hip socket in symptomatic dysplasia with preserved cartilage.
• Pelvic osteotomies/pelvic ring stabilization: for complex pelvic misalignments, post-traumatic.
• Leg length compensation: in selected cases via lengthening/shortening procedures.

As a conservative practice, we advise you in detail, provide second opinions, prepare diagnostics and support follow-up treatment. The actual operation takes place in specialized centers with which we are networked.

Rehabilitation and everyday life: realistic steps

Whether conservative or postoperative – structured rehabilitation is crucial. Content and schedule depend on findings, resilience and objectives.

Timings vary greatly; blanket promises are not serious. What is crucial is consistent cooperation and regular adjustments to the program.

Prevention, course and prognosis

Misalignments are not always avoidable. Nevertheless, the risk of symptoms can be reduced by controlling loads wisely and strengthening muscular protective mechanisms.

• Early detection of a family history of hip problems or persistent groin pain.
• Technique and strength training in sports, focus on hip abductors and core.
• Regular re-evaluation during growth spurts, after fractures or operations.
• Weight management and everyday activity.

The prognosis depends on the type and extent of the misalignment as well as treatment adherence. Many patients benefit significantly from consistent conservative treatment.

Your orthopedic consultation in Hamburg

Our practice at Dorotheenstrasse 48, 22301 Hamburg, offers a thorough assessment of misalignments of the femur and pelvis - with time for your questions, clear recommendations and an individual therapy plan. You can easily get appointments online via Doctolib or by email.