I HUMAN CASE WEEK 9 MUSCULOSKELETAL ANALYSIS
EVALUATING CHRONIC RIGHT KNEE PAIN IN AN 83 YEAR
OLD FEMALE DIFFERENTIATING OSTEOARTHRITIS FROM
INFLAMMATORY ARTHRITIS
, 1. Patient Introduction (Subjective Data Summary)
The patient, an 83-year-old female (5'1" / 155 cm, 186.0 lb), presents to the Outpatient Clinic with a
chief complaint: "My right knee hurts when I walk." The pain has been ongoing for approximately
two months, gradually worsening. The pain is described as dull, aching, and localized to the medial
aspect of the right knee. She reports significant stiffness upon waking and after sitting for prolonged
periods, which improves after moving for a few minutes (morning stiffness less than 30 minutes).
The pain is severely intensified by weight-bearing activities, such as walking or climbing stairs. She
denies any specific trauma, redness, fever, or chills. The functional impact is high; she requires a
cane for ambulation and notes limited household independence.
Relevant History: History of Hypertension. No known history of inflammatory joint disorders (like
Rheumatoid Arthritis or Gout). Medications: Lisinopril for HTN. Occasional Acetaminophen for pain,
with limited relief. Allergies: NKDA.
👉 Write like this: “83-year-old female presents with two months of insidious, worsening, dull,
aching, weight-bearing right knee pain localized to the medial aspect, characterized by brief morning
stiffness (< 30 minutes), strongly indicative of primary knee osteoarthritis.”
2. Objective Data / Findings
The following data represents the expected clinical findings for advanced knee Osteoarthritis:
Category Finding
Temp: 98.2°F (36.8°C), HR: 78 bpm, RR: 16 breaths/min, BP: 130/78 mmHg. All
Vital Signs
WNL.
Right Knee: Mild, non-pitting effusion noted. Tenderness to palpation over the
medial joint line (site of common wear). Gross crepitus (grinding sound/sensation)
Physical
noted with active and passive range of motion (ROM). ROM is decreased due to
Assessment
pain. Joint is stable. No warmth or erythema (ruling out acute
inflammation/infection). Gait: Antalgic (painful) gait, requiring a cane.
X-Ray (Right Knee): Recommended. Findings would likely show classic
Osteoarthritis changes: Joint space narrowing (medial compartment),
Diagnostic/Lab
Osteophytes (bone spurs), and Subchondral Sclerosis (increased bone density
Results
near the joint). Labs: Erythrocyte Sedimentation Rate (ESR) and C-Reactive Protein
(CRP) WNL (rules out inflammatory causes like RA or Gout).
3. Differential Diagnoses (Top 4)
1. Osteoarthritis (OA) of the Knee: This is the leading diagnosis. Supported by the age, chronic
worsening pain with activity, medial joint line tenderness, crepitus, and morning stiffness
EVALUATING CHRONIC RIGHT KNEE PAIN IN AN 83 YEAR
OLD FEMALE DIFFERENTIATING OSTEOARTHRITIS FROM
INFLAMMATORY ARTHRITIS
, 1. Patient Introduction (Subjective Data Summary)
The patient, an 83-year-old female (5'1" / 155 cm, 186.0 lb), presents to the Outpatient Clinic with a
chief complaint: "My right knee hurts when I walk." The pain has been ongoing for approximately
two months, gradually worsening. The pain is described as dull, aching, and localized to the medial
aspect of the right knee. She reports significant stiffness upon waking and after sitting for prolonged
periods, which improves after moving for a few minutes (morning stiffness less than 30 minutes).
The pain is severely intensified by weight-bearing activities, such as walking or climbing stairs. She
denies any specific trauma, redness, fever, or chills. The functional impact is high; she requires a
cane for ambulation and notes limited household independence.
Relevant History: History of Hypertension. No known history of inflammatory joint disorders (like
Rheumatoid Arthritis or Gout). Medications: Lisinopril for HTN. Occasional Acetaminophen for pain,
with limited relief. Allergies: NKDA.
👉 Write like this: “83-year-old female presents with two months of insidious, worsening, dull,
aching, weight-bearing right knee pain localized to the medial aspect, characterized by brief morning
stiffness (< 30 minutes), strongly indicative of primary knee osteoarthritis.”
2. Objective Data / Findings
The following data represents the expected clinical findings for advanced knee Osteoarthritis:
Category Finding
Temp: 98.2°F (36.8°C), HR: 78 bpm, RR: 16 breaths/min, BP: 130/78 mmHg. All
Vital Signs
WNL.
Right Knee: Mild, non-pitting effusion noted. Tenderness to palpation over the
medial joint line (site of common wear). Gross crepitus (grinding sound/sensation)
Physical
noted with active and passive range of motion (ROM). ROM is decreased due to
Assessment
pain. Joint is stable. No warmth or erythema (ruling out acute
inflammation/infection). Gait: Antalgic (painful) gait, requiring a cane.
X-Ray (Right Knee): Recommended. Findings would likely show classic
Osteoarthritis changes: Joint space narrowing (medial compartment),
Diagnostic/Lab
Osteophytes (bone spurs), and Subchondral Sclerosis (increased bone density
Results
near the joint). Labs: Erythrocyte Sedimentation Rate (ESR) and C-Reactive Protein
(CRP) WNL (rules out inflammatory causes like RA or Gout).
3. Differential Diagnoses (Top 4)
1. Osteoarthritis (OA) of the Knee: This is the leading diagnosis. Supported by the age, chronic
worsening pain with activity, medial joint line tenderness, crepitus, and morning stiffness
