Abdominal wall endometriosis: differentiation from other masses using CT features

Area of Science:

• Radiology
• Medical Imaging
• Pathology

Background:

• Abdominal wall masses can present diagnostic challenges.
• Differentiating endometriosis from other neoplastic and non-neoplastic lesions is crucial for appropriate management.

Purpose of the Study:

• To evaluate the effectiveness of computed tomography (CT) in differentiating abdominal wall endometriosis (AWE) from other abdominal wall masses.
• To identify specific CT imaging features associated with AWE.

Main Methods:

• A retrospective study included 105 women with abdominal wall masses who underwent CT and subsequent biopsy or resection.
• Two radiologists independently reviewed CT scans, assessing various morphologic and quantitative features.
• Statistical analysis, including Fisher's Exact Test and calculation of sensitivity and specificity, was performed to correlate CT findings with histopathologic diagnoses.

Main Results:

• Abdominal wall endometriosis was diagnosed in 24.8% of patients.
• CT features significantly associated with AWE included location below the umbilicus, homogeneous density, and the "gorgon" sign (peripheral linear infiltration).
• The combination of these three features yielded high sensitivity (0.69) and specificity (0.97) for diagnosing AWE.

Conclusions:

• Specific CT findings are valuable in differentiating AWE from other abdominal wall soft tissue masses.
• These imaging characteristics can assist in guiding decisions regarding biopsy and treatment strategies for patients with abdominal wall masses.