Diagnostic Assessment — Right Knee - Medial Femoral Condyle - Osteoarthritis
Example 1 of 1 · fictitious patient (Veteran T)
Diagnostic Assessment
Right Knee - Medial 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 medial 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
- 28 Apr 1990: Post-operative complications noted with recurrent knee swelling with pain following return to aggressive rehabilitation activities
- 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
- 23 Jun 2017: Assessment revealed Achilles tendinitis (Bilateral) with recommendation for physiotherapy and podiatry assessment, indicating continued lower limb biomechanical issues
- 06 July 2017: Physiotherapy assessment documented Achilles tendinitis (Bilateral), irritated right haglunds deformity affecting gait mechanics and lower limb function
- 23 November 2018: DVA diagnosis form completed for Lower Limb - Pain confirming ongoing chronic pain conditions affecting the lower extremities
Symptoms
At the time of initial injury in 1981, the veteran experienced acute ankle pain with swelling and restricted mobility affecting his gait pattern. Following the volleyball injury, he developed chronic pain and biomechanical dysfunction affecting his entire lower limb kinetic chain.
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. 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
- 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 - Medial 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 medial femoral condyle is a common site of osteoarthritic change in the knee, often associated with altered biomechanics and increased loading forces through the medial compartment.
Associated conditions identified include Right Knee - Lateral 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.
The temporal relationship demonstrates progression from initial chondromalacia identified in 1991, through subsequent mechanical interventions, to current established osteoarthritis affecting both medial and lateral 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 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 knee 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 [FILE REVIEW - CLAIMS.docx, Page 19].
When was the condition confirmed / formally diagnosed?
The condition was confirmed through arthroscopic examination on 26 May 1987 by Arthur A. the treating doctor, MD, FRCSC, which revealed a large area of central chondromalacia treated by chondroplasty [FILE REVIEW - CLAIMS.docx, Page 19]. Current formal imaging diagnosis of medial 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. Arthroscopic examination in 1991 revealed chondromalacia patella with cartilage irregularities [FILE REVIEW - CLAIMS.docx, Page 19]. Subsequent imaging studies have demonstrated characteristic osteoarthritic changes affecting the medial 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 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 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 confirmed chondromalacia patella, which preceded the development of established osteoarthritis.
Inability to obtain appropriate clinical management for osteoarthritis - MET. There were significant delays between symptom onset and definitive diagnosis and treatment, with conservative management approaches that did not prevent progression to established osteoarthritis, satisfying the Full Federal Court precedent in Brew v Repatriation Commission regarding barriers to appropriate healthcare access.
Sequelae
The right knee medial femoral condyle osteoarthritis represents a sequelae of the initial ankle trauma sustained in 1981, with subsequent biomechanical dysfunction leading to progressive degenerative changes in the knee joint 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.
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. The significant time delay between initial symptom development in the 1980s and formal diagnosis and appropriate treatment represents barriers to healthcare access. The lack of early intervention for biomechanical dysfunction and preventive measures for osteoarthritis development constitutes an inability to attain appropriate medical management, resulting in permanent worsening of the condition through progression from early chondromalacia 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
