Immediate Radiography Followed by MRI Without Contrast
This 77-year-old patient with spontaneous circumferential bruising and shoulder pain without trauma requires immediate plain radiographs of the shoulder to exclude pathologic fracture from underlying malignancy, followed by MRI without contrast if radiographs are abnormal or highly suspicious clinical features persist 1.
Critical Red Flags Present
This presentation is highly concerning for serious underlying pathology rather than typical degenerative shoulder disease:
- Spontaneous circumferential bruising without trauma is not consistent with routine rotator cuff pathology or degenerative disease
- The combination of pain, bruising, and reduced range of motion in an elderly patient suggests possible pathologic fracture from metastatic disease or multiple myeloma 2
- Age 77 places patient at higher risk for malignancy-related bone lesions
Algorithmic Approach to Initial Evaluation
Step 1: Plain Radiography (Immediate)
Radiography of the shoulder is usually appropriate as the initial imaging study in the setting of acute shoulder pain of any etiology 1. In this case, look specifically for:
- Osteolytic lesions
- Pathologic fracture of the proximal humerus
- Soft tissue masses
- Cortical destruction
Step 2: Advanced Imaging Based on Radiograph Results
If radiographs show fracture or suspicious lesions:
- CT shoulder without IV contrast is usually appropriate to characterize fracture patterns and osseous detail 1
- However, MRI shoulder without IV contrast may be more appropriate if rotator cuff injury assessment is needed and surgical fracture fixation is not planned 1
If radiographs are normal but clinical suspicion remains high:
- MRI shoulder without IV contrast is usually appropriate as it can demonstrate bone marrow edema, occult fracture, and soft tissue pathology 1
- MRI is superior for detecting early marrow infiltration from myeloma or metastatic disease before cortical destruction is visible on radiographs
Clinical Examination Priorities
Focus on features suggesting serious pathology rather than routine degenerative disease:
- Constitutional symptoms: fever, unexplained weight loss, night sweats
- Palpable mass in the upper arm
- Warmth and swelling (as seen in the myeloma case) 2
- Neurologic deficits
- History of malignancy
Laboratory Evaluation
Given the spontaneous bruising and age, obtain:
- Complete blood count (looking for anemia, which was present in the myeloma case) 2
- Erythrocyte sedimentation rate/C-reactive protein
- Serum protein electrophoresis and immunofixation if myeloma suspected 2
- Calcium level
Common Pitfall to Avoid
Do not assume this is routine degenerative rotator cuff disease simply because the patient is elderly with shoulder pain. The spontaneous circumferential bruising without trauma is a critical distinguishing feature that demands investigation for serious pathology. While most shoulder pain in primary care is benign and self-limiting 3, this presentation has multiple red flags requiring urgent imaging and potential specialist referral 3.
Specialist Referral Indications
Urgent referral is warranted for:
- Suspected malignancy, infection, or pathologic fracture 3
- Radiographic evidence of osteolytic lesions or fracture
- Significant functional or neurologic deficit 3
The case report of an 81-year-old with similar presentation (progressive shoulder pain, warm swollen upper arm with palpable mass, no trauma) who was diagnosed with multiple myeloma with pathologic fracture emphasizes the importance of maintaining high clinical suspicion in elderly patients with atypical presentations 2.