Patellofemoral Syndrome (Knee)

1. What This Condition Is

Patellofemoral syndrome is pain originating from the interface between the kneecap (patella) and the thigh bone (femur). The cartilage on the back of the patella breaks down or becomes irritated, causing pain with activities that load the knee: squatting, climbing stairs, kneeling, running, prolonged sitting, and rising from a chair. In military populations it is one of the most common overuse injuries. VA rates it because it directly limits load-bearing, sustained walking, and the physical demands of most occupations.

Service connection is typically direct, based on documented knee symptoms during service from running, rucking, physical training, or occupational load-bearing. It can also be claimed as a secondary condition from service-connected pes planus (altered biomechanics transmit lateral patellar stress), low back conditions affecting gait, or hip pathology.

2. VA Rating Criteria

VA does not have a single diagnostic code exclusively for patellofemoral syndrome. This is a common source of confusion. VA raters assign ratings using the diagnostic code or combination of codes that most closely match the veteran's symptoms and functional findings. The most frequently applied codes are:

DC 5257 -- Knee, other impairment of (including patellar instability)

DC 5260 -- Limitation of flexion of the leg (normal: 0 to 140 degrees)

DC 5261 -- Limitation of extension of the leg (normal: 0 degrees)

VA may assign ratings under DC 5257, 5260, and 5261 simultaneously when there is non-overlapping symptomatology, for example, both recurrent instability and a measurable limitation of flexion. Separate ratings for the same joint are assigned when each code captures a distinct facet of the disability.

Under 38 CFR 4.40, 4.45, and DeLuca v. Brown, VA must also consider functional loss from pain, weakness, and fatigability, not just the degrees achieved on goniometer measurement.

3. What to Expect at Your C&P Exam

The examiner will conduct a detailed knee examination. For patellofemoral syndrome specifically, expect:

• Range of motion testing with a goniometer: flexion and extension measured actively and after three repetitions (to assess fatigability)
• Patellar compression test (Clarke's sign): the examiner compresses the patella against the femur while you contract the quadriceps
• Assessment for patellar tracking: observation of how the patella moves through its groove during flexion and extension
• Patellar apprehension test: the examiner pushes the patella laterally while your knee is flexed; a positive test indicates instability
• McMurray's test and Lachman's test to rule out meniscal or ligamentous pathology
• Assessment for crepitus, effusion, and tenderness along the patella and patellar tendon
• Strength testing of the quadriceps

Tell the examiner about your worst days and flare-up triggers. Describe what activities you cannot perform: squatting, kneeling, stair climbing, standing for extended periods, driving. If you use a knee brace, tell the examiner whether it was prescribed and whether you require it to function. Prescribed assistive equipment is directly relevant to DC 5257 ratings.

Document your pain during motion, not just your end-range measurement. The point at which pain begins during flexion or extension must be noted in the exam, and it affects the functional loss analysis.

4. Evidence You Need to Win

A diagnosis of patellofemoral syndrome from a physician or orthopedic specialist anchors the claim. Imaging and functional testing strengthen it.

Key evidence to gather:

• Service treatment records showing knee complaints, sick call visits for knee pain, or documented physical training injuries
• A current clinical diagnosis of patellofemoral syndrome from an orthopedic surgeon, sports medicine physician, or physiatrist
• Imaging: X-ray of the knee (including merchant or sunrise view of the patellofemoral joint), MRI documenting chondromalacia patella or cartilage thinning, and any post-surgical operative reports
• Physical therapy records documenting range of motion measurements at multiple points in time
• A nexus letter connecting your current knee condition to your military service or to a service-connected condition (38 CFR 3.102 standard)
• Documentation of brace prescription if you use one: this is directly relevant to the DC 5257 rating hierarchy
• A personal statement describing how your knee limits daily and occupational function, how often flare-ups occur, and what activities you have given up

The relevant VA DBQ is titled "Knee and Lower Leg Conditions DBQ." Having a private orthopedic surgeon complete this form before your C&P exam gives you a documented severity baseline that the VA examiner must address and cannot ignore.

Buddy statements (VA Form 21-10210) from family members or coworkers describing observed limitations are strong corroboration.

5. Secondary Conditions to Consider

Patellofemoral syndrome affects how you move. Veterans with persistent knee pain compensate with gait changes that create downstream problems. Secondary conditions worth evaluating include:

• Pes planus: Abnormal gait mechanics from knee pain can contribute to arch collapse. Conversely, pre-existing flat feet often cause patellofemoral syndrome as a primary source. If service-connected flat feet produced your knee condition, file a secondary claim.
• Hip bursitis and strain: Compensating for a painful knee by altering stride length and hip alignment leads to trochanteric bursitis and hip flexor strain.
• Lumbar spine strain and disc disease: Limping from a painful knee imposes asymmetric loading on the lumbar spine. This is one of the most common pathways to a secondary back claim (DC 5237, 5242, 5243).
• Contralateral knee: Overloading the opposite knee to protect the service-connected knee produces wear that can be documented and claimed as a secondary disability.
• Sleep impairment: Chronic knee pain disrupts sleep. If your service-connected knee pain directly causes insomnia, that is a ratable secondary condition under DC 6354 or the analogous general rating formula.

File secondary claims under 38 CFR 3.310 with medical evidence linking each condition to your service-connected knee disability.

6. Common Mistakes That Kill Claims

Accepting only a soft tissue rating when range of motion is also limited. Many veterans are rated under DC 5257 for instability but never have their range of motion formally measured for separate DC 5260/5261 ratings. If your knee both slips and has restricted motion, you may be entitled to combined ratings. Insist that range of motion be measured and documented at every exam.

Not documenting painful motion. The most underutilized principle in knee rating is that pain during range of motion -- not just end-range restriction -- must be factored into the disability rating. Under DeLuca v. Brown and 38 CFR 4.40, if your knee hurts at 70 degrees of flexion, that is functional loss. Tell the examiner exactly where pain begins and write it in your personal statement.

Failing to bring your prescribed brace to the exam. The DC 5257 rating hierarchy at 20% and 30% specifically requires a prescription for a brace, cane, or walker. If you use a brace that was prescribed by a physician, bring it to the exam and bring documentation of the prescription. Without that documentation, you may be limited to 10%.

Relying only on X-ray findings. Standard knee X-rays often appear normal with patellofemoral syndrome unless chondromalacia is advanced. A normal X-ray does not mean no disability. An MRI showing cartilage changes or patellar maltracking is much more probative. If you do not have MRI imaging, pursue it.

Not filing secondary claims for the back and contralateral knee. These are two of the most common secondary paths from a knee condition. Veterans leave significant rating potential on the table by not connecting the dots.

7. FWD Assist Resources

The following FWD Assist books are relevant to your patellofemoral syndrome claim:

• "C&P Exam Secrets" covers how to present knee conditions effectively, what examiners measure and why, and how to document painful motion and functional loss.
• "Back and Joint Conditions" addresses the full lower extremity rating picture, including how knee conditions interact with ankle, hip, and spine ratings.
• "Nexus Letters" explains how to commission a private medical opinion that meets the legal standard and can support both direct and secondary claims.
• "Secondary Conditions" walks through building 38 CFR 3.310 claims from your service-connected knee condition to back, hip, and contralateral knee.
• "VA Appeals" explains all three AMA lanes so you can challenge a low rating or a denial at the rating, Higher-Level Review, or Board level.

Visit fwdassisthq.com for the full catalog.

8. Get Help Without a Claim Shark

Free accredited help is available through Veterans Service Organizations including the Disabled American Veterans (DAV), Veterans of Foreign Wars (VFW), American Legion, and AMVETS. County Veterans Service Officers (CVSOs) provide free claims assistance at no cost.

VA-accredited attorneys and claims agents may charge fees only after an initial VA decision and only on past-due benefits. Fees are capped at 20 percent of retroactive benefits under 38 U.S.C. 5904. Upfront fees for VA claims assistance violate 38 U.S.C. 5905.

Verify that any representative you work with is accredited at va.gov/ogc/accreditation.asp.