Diagnostic Assessment — Right Wrist - Ganglion Cyst
Example 1 of 1 · fictitious patient (Veteran F)
Diagnostic Assessment
RIGHT WRIST - GANGLION CYST
Statement of Principles concerning ganglion (Reasonable Hypothesis) Instrument No. 20 of 2018 and Statement of Principles concerning ganglion (Balance of Probabilities) Instrument No. 21 of 2018.
ADF History
Name: The veteran
Date of Birth: [withheld]
Occupation: Communications, SASR
Enlistment Date: 17 Dec 1993
Discharge Date: Still Serving
Occupational History
As a Communications specialist in the Australian Defence Force a specialist regiment (SASR), the veteran duties involve frequent and repetitive use of the wrists and hands. His role requires installation, maintenance, and operation of communications equipment, often in field conditions that necessitate awkward wrist positions. SASR operations involve carrying heavy equipment, weapon handling, and tactical movements that place repetitive stress on the wrist joints. The communications specialty frequently requires prolonged periods of typing, cable manipulation, equipment assembly, and fine motor tasks that create cumulative strain on the joint capsule and tendon sheaths of the wrist. These occupational activities represent significant risk factors for the development of ganglion cysts, which often arise from areas of repetitive microtrauma to the joint capsule or tendon sheaths.
History
The veteran the veteran a Communications specialist with the Australian a specialist regiment, developed a visible and palpable mass on the dorsal aspect of his right wrist. Clinical evaluation and diagnostic imaging have confirmed a dorsal wrist ganglion cyst arising from the scapholunate joint.
Timeline
- 18 May 2017: Initial notice of a small lump on the dorsal right wrist. Patient reports "painless swelling that appeared gradually".
- 02 Jun 2017: Assessment documented a well-circumscribed, cystic mass on the dorsal aspect of the right wrist. Clinical impression of ganglion cyst.
- 16 Jun 2017: Ultrasound of right wrist performed. "Cystic lesion on the dorsal wrist measuring 1.1 x 0.8 cm, consistent with ganglion cyst".
- 30 Jun 2017: Orthopedic hand consultation confirming diagnosis. "Classic presentation of dorsal wrist ganglion arising from scapholunate joint".
- 13 Jul 2017: Discussion of treatment options, decision for conservative management initially. "Minimal symptoms, functional impact not significant at present".
- 24 Aug 2017: Follow-up noting no significant change in size but occasional discomfort with certain wrist positions. "Mild discomfort with extreme extension".
- 29 Sep 2017: Re-evaluation documenting slight increase in size with more noticeable functional limitations. "Interferes with push-ups and certain tactical equipment use".
Symptoms
The veteran initially noticed a small, painless lump on the dorsal aspect of his right wrist that developed gradually without specific trauma. The mass was described as firm but with some give when pressed, consistent with the cystic nature of a ganglion. While initially asymptomatic, he subsequently developed mild discomfort with certain wrist positions, particularly extreme extension. As the cyst enlarged slightly, he reported increased awareness of the mass during occupational activities, specifically noting interference with push-up exercises and certain tactical equipment use. Physical examination revealed a 1.1 x 0.8 cm well-circumscribed, smooth, cystic mass located on the dorsal aspect of the right wrist, proximal to the third metacarpal and overlying the scapholunate joint area. The mass was mobile, non-tender, and transilluminated with a penlight. Wrist range of motion was preserved but with mild discomfort at extremes of extension. Current symptoms include awareness of the mass during load-bearing through the extended wrist and occasional catching sensations when manipulating communications equipment in the field.
Imaging
16 Jun 2017 - ULTRASOUND RIGHT WRIST: There is a well-defined anechoic cystic structure measuring 1.1 x 0.8 cm located on the dorsal aspect of the right wrist, overlying the scapholunate joint. The lesion demonstrates thin walls without internal septations or solid components. Color Doppler shows no internal vascularity. Adjacent tendons and neurovascular structures appear normal. IMPRESSION: Findings consistent with a dorsal wrist ganglion cyst arising from the scapholunate joint.
1. What is the formal diagnosis of the condition claimed above?
The formal diagnosis is Right Wrist Ganglion Cyst (ICD-10 Code: M67.42). This diagnosis falls under the DVA Statement of Principles concerning ganglion (Reasonable Hypothesis) Instrument No. 20 of 2018 and Statement of Principles concerning ganglion (Balance of Probabilities) Instrument No. 21 of 2018.
A ganglion cyst is a benign, fluid-filled cystic mass that arises from a joint capsule, ligament, or tendon sheath. It contains clear, gelatinous fluid similar to synovial fluid but more viscous. Ganglion cysts most commonly occur around the wrist, particularly on the dorsal aspect overlying the scapholunate joint, as in the veteran case. They are believed to form due to myxoid degeneration of connective tissue and often communicate with the adjacent joint or tendon sheath via a stalk or pedicle.
Dorsal wrist ganglions typically present as well-circumscribed, smooth, firm masses that are fixed to deep structures but with some mobility of the overlying skin. They often fluctuate in size over time and may cause discomfort or functional limitations depending on their size and location. The diagnosis is typically made based on clinical examination and confirmed with ultrasound or MRI imaging, which demonstrates the characteristic cystic nature of the lesion.
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 noticed the ganglion cyst on his right wrist on or before 18 May 2017, when he reported a "painless swelling that appeared gradually." While the exact onset is difficult to determine due to the initially asymptomatic nature of the condition, this represents the first documented awareness of the mass.
When did the veteran first present to a health / medical provider for this condition?
The veteran first presented to a health provider for this condition on 18 May 2017, when he reported to the ADF Medical Centre with a small lump on the dorsal right wrist that he had noticed developing gradually.
When was the condition confirmed / formally diagnosed?
The condition was initially suspected based on clinical examination on 02 Jun 2017, which documented a well-circumscribed, cystic mass consistent with a ganglion cyst. Definitive confirmation was provided by ultrasound on 16 Jun 2017, which demonstrated a 1.1 x 0.8 cm anechoic cystic structure overlying the scapholunate joint. The diagnosis was formally established by an orthopedic hand specialist on 30 Jun 2017.
When did the veteran first present to you (or your practice) for this condition?
18 January 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 of Right Wrist Ganglion Cyst was confirmed through a comprehensive assessment including clinical evaluation, diagnostic imaging, and specialist consultation:
Key symptoms and history included gradual onset of a painless swelling on the dorsal aspect of the right wrist, no specific trauma recalled, development of mild discomfort with certain wrist positions particularly extreme extension, and functional interference with push-up exercises and tactical equipment use.
Clinical examination findings included a well-circumscribed, smooth, cystic mass on the dorsal right wrist, location proximal to the third metacarpal overlying the scapholunate joint area, mass measuring approximately 1.1 x 0.8 cm, positive transillumination with penlight, mobile mass with fixed attachment to deeper structures, and preserved wrist range of motion with mild discomfort at extremes of extension.
Diagnostic imaging provided definitive confirmation with Ultrasound of the Right Wrist demonstrating a well-defined anechoic cystic structure measuring 1.1 x 0.8 cm, location on the dorsal aspect of the right wrist overlying the scapholunate joint, thin walls without internal septations or solid components, no internal vascularity on Color Doppler, and normal adjacent tendons and neurovascular structures.
Specialist opinion from an orthopedic hand consultation confirmed the diagnosis of dorsal wrist ganglion cyst, noting the "classic presentation" and typical location arising from the scapholunate joint.
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.
Factors under Statement of Principles concerning ganglion (Balance of Probabilities) Instrument No. 21 of 2018:
having trauma to the affected joint, tendon or tendon sheath within the one year before the clinical onset of ganglion: MET
- While there is no documented specific traumatic event to the right wrist, the veteran role in SASR involves activities that could result in cumulative microtrauma to the wrist joint. The SOP definition of trauma includes "repetitive minor trauma" which can reasonably apply to the repetitive wrist stress associated with his communications duties.
having surgery to the affected joint or tendon within the six months before the clinical onset of ganglion: NOT MET
- No history of surgery to the right wrist documented.
having inflammatory joint disease involving the joint that is affected by ganglion, before the clinical onset of ganglion: NOT MET
- No inflammatory joint disease documented.
having a benign or malignant neoplasm involving the affected joint, ligament, bursa, tendon or tendon sheath before the clinical onset of ganglion: NOT MET
- No history of neoplasm involving the right wrist.
inability to obtain appropriate clinical management for ganglion: NOT MET
- There is no evidence that appropriate management was unavailable once the condition developed.
Factors under Statement of Principles concerning ganglion (Reasonable Hypothesis) Instrument No. 20 of 2018:
The factors in the Reasonable Hypothesis SOP are identical to those in the Balance of Probabilities SOP, with the same MET status for trauma and NOT MET status for all other factors.
The development of a ganglion cyst in the veteran right wrist is most likely related to repetitive minor trauma associated with his occupational duties as a Communications specialist in SASR. The specific location of the ganglion—on the dorsal wrist overlying the scapholunate joint—is consistent with the most common presentation of this condition and correlates with areas of the wrist that experience significant stress during activities involving wrist extension and loading.
The pathophysiology of ganglion cyst formation involves myxoid degeneration of connective tissue, often triggered by repetitive microtrauma. The veteran duties would expose his wrists to such repetitive stress through installation and maintenance of communications equipment requiring awkward and sustained wrist positions, carrying and manipulating tactical equipment, physical training activities including push-ups and other load-bearing exercises through extended wrists, and typing and fine motor manipulation required for communications operations.
Sequelae
There is no indication that the right wrist ganglion cyst is a sequela of another condition.
Unintended Consequence
There is no evidence to suggest that the right wrist ganglion cyst resulted as an unintended consequence of medical treatment provided by the Commonwealth.
Inability to Attain Appropriate Medical Management
There is no evidence that the veteran experienced any inability to obtain appropriate clinical management for his right wrist ganglion cyst. Upon reporting the condition, he received timely assessment, appropriate diagnostic imaging, specialist consultation, and discussion of treatment options.
The % contribution of the causes is 100% and significant
5. Please provide a Health Summary and a medication / prescribing history.
-see attached report
