Value of diffusion-weighted magnetic resonance imaging in the diagnosis of pyomyoma

Area of Science:

• Reproductive medicine
• Medical imaging
• Infectious diseases

Background:

• Pyomyomas result from infected leiomyomas (fibroids), a rare but serious condition.
• Delayed diagnosis of pyomyoma can lead to sepsis, a life-threatening systemic infection.
• Nonspecific findings on ultrasonography and CT scans often hinder early pyomyoma detection.

Observation:

• A woman presented with fever and abdominal pain, initially evaluated with computed tomography (CT).
• CT revealed a large, hypodense uterine lesion with peripheral enhancement but no gas.
• The lesion's characteristics on CT were insufficient for a definitive pyomyoma diagnosis.

Findings:

• Diffusion-weighted magnetic resonance imaging (DW-MRI) demonstrated restricted diffusion within the uterine lesion.
• Restricted diffusion on DW-MRI is indicative of pus formation, confirming the pyomyoma diagnosis.
• DW-MRI proved essential in differentiating pyomyoma from other uterine pathologies.

Implications:

• Early and accurate diagnosis of pyomyoma is critical to prevent severe complications like sepsis.
• DW-MRI should be considered in the diagnostic workup for suspected pyomyomas, especially with indeterminate CT findings.
• Integrating advanced imaging like DW-MRI can improve patient outcomes for rare uterine conditions.