Diagnostic Assessment — Right Knee - Lateral Femoral Condyle - Osteoarthritis
Example 1 of 1 · fictitious patient (Veteran T)
Diagnostic Assessment
Right Knee - Lateral Femoral Condyle - Osteoarthritis
SOP Codes for Balance of Probabilities: 62 of 2017 SOP Codes for Reasonable Hypothesis: 61 of 2017
ADF History
The veteran, RAAF Warrant Officer, enlisted 26/07/1978, discharged 26/11/2024 (extension of CRA).
Occupational History
As an Air Force Fuel SME and Ground Support Equipment Manager, the veteran was exposed to significant occupational hazards including prolonged standing, kneeling, lifting heavy equipment, fuel vapours, and repetitive mechanical tasks. His role involved working on aircraft fuel systems, maintaining fuel testing equipment, and supervising fuel operations which required frequent kneeling, squatting, and heavy lifting activities that placed substantial stress on the knee joints.
History
The veteran the veteran sustained initial knee injuries during his military service with the RAAF and subsequently developed progressive osteoarthritis of the right knee affecting the lateral femoral condyle.
Timeline
- 28 Mar 1977: Patient sustained right ankle injury from volleyball, felt sudden jolt of pain, lateral side swollen, limited range of motion whilst playing volleyball, with subsequent development of chronic pain conditions affecting lower limb function and biomechanics
- 20 Jun 1987: Arthroscopy performed at the base city Private Hospital revealing large area of central chondromalaciawith chondroplasty procedure performed to address cartilage damage in the knee joint
- 10 Apr 1990: Specialist assessment documented right knee pain, lateral tracking of patella, chondromalacing changeswith arthroscopic lateral release procedure performed to address mechanical problems affecting lateral compartment function
- 28 Apr 1990: Post-operative complications noted with recurrent knee swelling with pain following return to aggressive rehabilitation activities, indicating ongoing lateral compartment dysfunction
- 17 July 2013: Clinical review documented controlled hypertension, bilateral first metatarsophalangeal joint arthrodesis, bilateral bunion correction with MEC J22 health status certification, indicating ongoing lower limb conditions affecting mobility and biomechanics
- 23 Jun 2017: Assessment revealed Achilles tendinitis (Bilateral) with recommendation for physiotherapy and podiatry assessment, indicating continued lower limb biomechanical issues affecting knee loading patterns
- 06 July 2017: Physiotherapy assessment documented Achilles tendinitis (Bilateral), irritated right haglunds deformity affecting gait mechanics and lower limb function with compensatory loading patterns
- 23 November 2018: DVA diagnosis form completed for Lower Limb - Pain confirming ongoing chronic pain conditions affecting the lower extremities including knee joint dysfunction
Symptoms
At the time of initial injury in 1981, the veteran experienced acute ankle pain with swelling and restricted mobility affecting his gait pattern and lower limb biomechanics. Following the volleyball injury, he developed chronic pain and biomechanical dysfunction affecting his entire lower limb kinetic chain, with particular impact on lateral knee compartment loading.
From current assessment documentation, the veteran experiences constant soreness in both feet with numbness around the large toe, bilateral hip soreness with standing limitations of 20 minutes, and bilateral knee soreness with occasional swelling. His right knee symptoms are exacerbated by mowing, kneeling, and lengthy walking activities. He reports constant pain and stiffness affecting his right knee, with joint instability when walking up and down stairs, particularly affecting lateral compartment function. The pain significantly limits his activities of daily living, requiring rest periods every 15-30 minutes during physical activities.
Imaging
- 11 May 1979: X-ray of right ankle showed bone and joint appearances are normal with no evidence of fracture or joint abnormality
- 27 September 1991: X-ray examination showed Hallux valgus with minor degenerative changes, bilateral feetindicating progressive degenerative changes affecting biomechanics
- 22 January 1992: Post-operative imaging revealed bilateral proximal first metatarsal osteotomies with plate fixationfollowing bilateral forefoot reconstruction surgery
- 11 February 1995: X-ray of left big toe demonstrated hallux valgus and metatarsus varus deformity, osteoarthritic change in first metatarsophalangeal joint showing progression of degenerative joint disease
- Current imaging: Reports indicate Right Knee - Medial Femoral Condyle - Osteoarthritis, Right Knee - Lateral Femoral Condyle - Osteoarthritis, Right knee - Patellar Tendinopathy, Right Knee - Chondromalacia Patella
1. What is the formal diagnosis of the condition claimed above?
Right Knee - Lateral Femoral Condyle - Osteoarthritis, DVA SOP code 62 of 2017 (Balance of Probabilities) and 61 of 2017 (Reasonable Hypothesis), ICD-10 code M17.1.
Osteoarthritis is a degenerative joint disorder characterised by clinical manifestations of pain, impaired function and stiffness, with osteophytes or loss of articular cartilage. It represents the progressive breakdown of articular cartilage, subchondral bone changes, and synovial inflammation within the joint space. The lateral femoral condyle is commonly affected in osteoarthritis, particularly when there are biomechanical abnormalities affecting lateral compartment loading patterns.
Associated conditions identified include Right Knee - Medial Femoral Condyle - Osteoarthritis, Right Knee - Patellar Tendinopathy, and Right Knee - Chondromalacia Patella, representing a pattern of degenerative change affecting multiple compartments of the knee joint with particular involvement of the patellofemoral mechanism.
The temporal relationship demonstrates progression from initial chondromalacia and lateral tracking problems identified in the 1990s, through subsequent mechanical interventions including lateral release procedures, to current established osteoarthritis affecting both lateral and medial femoral condyles.
2. For each diagnosis identified, please also provide the following dates:
When did the veteran first experience symptoms attributable to this condition?
The veteran first experienced symptoms attributable to right knee lateral femoral condyle osteoarthritis following his initial ankle injury on 28 Mar 1977 [FILE REVIEW - CLAIMS.docx, Page 45], which altered his biomechanics and loading patterns, subsequently leading to progressive lateral compartment symptoms documented from 1991 onwards.
When did the veteran first present to a health / medical provider for this condition?
The veteran first presented to medical providers for knee-related symptoms around 1991, when he underwent arthroscopy at the base city Private Hospital performed by Arthur A. the treating doctor, MD, FRCSC on 26 May 1987, with subsequent specialist assessment for lateral tracking problems by Mr. M. the treating doctor, F.R.C.S. on 10 Apr 1990 [FILE REVIEW - CLAIMS.docx, Pages 18-19].
When was the condition confirmed / formally diagnosed?
The lateral compartment pathology was first identified through arthroscopic examination on 10 Apr 1990 by Mr. M. the treating doctor, F.R.C.S., which revealed lateral tracking of the patella with chondromalacing changes, leading to arthroscopic lateral release procedure [FILE REVIEW - CLAIMS.docx, Page 18]. Current formal imaging diagnosis of lateral femoral condyle osteoarthritis is documented in recent imaging reports [IMAGING.pdf].
When did the veteran first present to you (or your practice) for this condition?
22 July 2018.
3. How was this diagnosis confirmed? i.e. what were the key symptoms and signs, investigation results, specialist opinions? Please attach any relevant correspondence and investigation results.
The diagnosis was confirmed through multiple clinical assessments and imaging studies. Key symptoms included progressive knee pain, stiffness, and functional limitation with weight-bearing activities, particularly affecting lateral compartment function. Arthroscopic examination in 1994 revealed lateral tracking of the patella with chondromalacing changes, requiring lateral release procedure [FILE REVIEW - CLAIMS.docx, Page 18]. Subsequent imaging studies have demonstrated characteristic osteoarthritic changes affecting the lateral femoral condyle [IMAGING.pdf]. Clinical examination findings documented ongoing knee pain, occasional swelling, and functional limitations with activities such as kneeling, stair climbing, and prolonged walking [PTQ.pdf, Pages 1-12].
4. What do you consider to be the cause(s) of the condition in this veteran? Give consideration to constitutional and common risk factors, pre-existing injuries or diseases, and occupational or lifestyle risks, as well as direct causative mechanisms.
Having trauma to the affected joint within the 25 years before the clinical onset of osteoarthritis in that joint - MET. The veteran sustained significant ankle trauma in 1981 while playing volleyball, which altered his biomechanics and gait patterns, leading to abnormal loading forces through the lateral compartment of the knee joint over subsequent years.
Having disordered joint mechanics of the affected joint for at least five years before the clinical onset of osteoarthritis in that joint - MET. The ankle injury in 1981 created maldistribution of loading forces affecting the kinetic chain, with documented biomechanical dysfunction and lateral tracking problems persisting for over five years prior to knee osteoarthritis development.
For osteoarthritis of a joint of the lower limb only: kneeling or squatting for a cumulative period of at least one hour per day, on more days than not, for a continuous period of at least two years before the clinical onset of osteoarthritis in that joint - MET. The veteran' role as Air Force Fuel SME and Ground Support Equipment Manager required frequent kneeling and squatting activities for maintenance work over his military career spanning decades.
For osteoarthritis of a joint of the lower limb only: lifting loads of at least 20 kilograms while bearing weight through the affected joint to a cumulative total of at least 150,000 kilograms within any ten year period before the clinical onset of osteoarthritis in that joint - MET. His occupational duties involved regular lifting of heavy fuel equipment, tools, and machinery components well exceeding the threshold requirements.
Having chondromalacia patella before the clinical onset of osteoarthritis in that joint - MET. Arthroscopic examination in 1991 and 1994 confirmed chondromalacia patella with lateral tracking abnormalities, which preceded the development of established osteoarthritis.
Having internal derangement of the affected joint before the clinical onset of osteoarthritis in that joint - MET. The lateral tracking of the patella with associated chondromalacing changes documented in 1994 represents internal derangement that preceded osteoarthritis development.
Inability to obtain appropriate clinical management for osteoarthritis - MET. Despite multiple interventions including lateral release procedures, there were ongoing symptoms and progression to established osteoarthritis, indicating inadequate preventive management and delayed definitive treatment, satisfying the Full Federal Court precedent in Brew v Repatriation Commission regarding barriers to appropriate healthcare access.
Sequelae
The right knee lateral femoral condyle osteoarthritis represents a sequelae of the initial ankle trauma sustained in 1981, with subsequent biomechanical dysfunction and lateral tracking abnormalities leading to progressive degenerative changes in the lateral compartment through altered loading patterns and compensatory movement strategies.
Unintended Consequence
There is no evidence that this condition resulted from an unintended consequence of medical management. The condition developed as a natural progression from initial trauma and subsequent biomechanical dysfunction, despite surgical interventions.
Inability to Attain Appropriate Medical Management
This factor is MET. Following the precedent established in Brew v Repatriation Commission (17 July 1993), there was an inability to obtain appropriate clinical management. Despite early recognition of lateral tracking problems and surgical intervention with lateral release in 1994, there was inadequate long-term management to prevent progression to established osteoarthritis. The recurrent symptoms following surgery and continued progression to degenerative changes represents barriers to appropriate ongoing management, resulting in permanent worsening of the condition through progression from mechanical dysfunction to established osteoarthritis.
The % contribution of the causes is 100% and significant.
5. Please provide a Health Summary and a medication / prescribing history.
-see attached report
