17d • General discussion
The Consultant’s Mind — Episode 1
A Painful Knee
Case
65-year-old female
Chief complaint:
- Right knee pain for 5 years
History:
- Gradually progressive
- Worse while walking
- Worse while climbing stairs
- Relieved partially by rest
No:
- Fever
- Weight loss
- Night pain
- Recent trauma
Examination:
- Varus deformity
- Medial joint line tenderness
- Crepitus present
- ROM: 0–110°
Investigations:
- ESR normal
- CRP normal
The Question
Before looking at any X-rays:
What are you thinking?
What are your top 3 differential diagnoses?
What additional questions would you ask?
👇 Comment before scrolling further.
Consultant’s Thought Process
This is where the learning happens.
Step 1
Could this be infection?
Unlikely.
Why?
- Long duration
- No fever
- No constitutional symptoms
- ESR/CRP normal
Infection moves down the list.
Step 2
Could this be inflammatory arthritis?
Possible.
But less likely.
Why?
- No morning stiffness history
- No small joint involvement
- Varus deformity suggests compartment wear
Step 3
Could this be malignancy?
Always think about it.
But:
- No night pain
- No weight loss
- Long indolent course
Less likely.
Step 4
Most likely diagnosis?
Medial compartment osteoarthritis of the knee
Why?
- Age
- Progressive pain
- Varus deformity
- Medial joint tenderness
- Crepitus
All point in the same direction.
The Lesson
A consultant rarely jumps to the diagnosis.
A consultant first asks:
What dangerous things must I exclude?
Only then:
What is most likely?
Discussion Question
What X-ray findings would you expect in this patient?
🦴 Comment below before the next post reveals the imaging.
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The Consultant’s Mind — Episode 1
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