Primary Epiploic Appendagitis: Not Rare But Rarely Diagnosed Pathology

Primary epiploic appendagitis (PEA) remains under-recognized despite its potential frequency in acute abdominal presentations. Prior research has shown that acute abdominal pain often leads to diagnostic uncertainty, with conditions like appendicitis or diverticulitis commonly misdiagnosed. However, no prior work had resolved the specific clinical and imaging features that distinguish PEA from other causes of acute abdomen. This gap motivated researchers to investigate whether PEA has unique clinical and radiological markers that could aid in diagnosis. While it was already known that PEA is generally benign and self-limiting, the diagnostic efficacy of ultrasound compared to computed tomography remained unclear. Additionally, no prior work had resolved the anatomical localization patterns of PEA lesions. This uncertainty drove the current study to clarify the clinical presentation and diagnostic accuracy of ultrasound in identifying PEA. The lack of standardized diagnostic criteria for PEA also created a need for better understanding of its clinical course and imaging characteristics.

This study aimed to identify clinical and laboratory features that may be suggestive of primary epiploic appendagitis (PEA) and to compare the diagnostic accuracy of ultrasound (US) and computed tomography (CT) in detecting PEA. The researchers sought to determine whether specific clinical findings or imaging patterns could help distinguish PEA from other acute abdominal conditions. They also wanted to evaluate the anatomical localization of PEA lesions to better understand their typical presentation. By analyzing both clinical and radiological data, the study aimed to clarify the role of ultrasound in diagnosing PEA. The motivation for this work stemmed from the high rate of misdiagnosis and unnecessary imaging associated with PEA. The researchers proposed that targeted ultrasound could reduce the need for further imaging and prevent mistreatment. They also aimed to quantify the size and location of PEA lesions using both imaging modalities. Ultimately, the study sought to support clinicians and radiologists in recognizing PEA as a self-limiting condition that does not require aggressive intervention.

The researchers conducted a retrospective analysis of 92 patients diagnosed with PEA using either ultrasound (US), computed tomography (CT), or both imaging modalities. Clinical data collected included patient symptoms, physical examination findings, and laboratory parameters such as white blood cell count. Radiological data focused on lesion size, location, and proximity to the colon and skin. The study group included 16 female and 76 male patients with a mean age of 35 years. Both US and CT images were evaluated for lesion dimensions in long-axis and short-axis measurements. The distance of the lesion to the skin was also measured in both imaging modalities. The researchers compared the diagnostic accuracy of US and CT in identifying PEA features. They analyzed the anatomical localization of PEA lesions, particularly their relationship to the sigmoid-descending colon junction. The study also assessed the clinical course of PEA to determine the effectiveness of conservative treatment. Data were collected from medical records and imaging reports to ensure consistency in findings.

The most common symptom among patients was well-localized abdominal pain, observed in all 92 cases. The mean white blood cell count was 7857±1326 mm^-3, indicating a mild inflammatory response. The majority of PEA lesions (79 out of 92) were localized at the sigmoid-descending colon junction. In patients examined with both US and CT, the mean long-axis diameter of the fatty central core was 28.10 mm on US and 26.88 mm on CT. The mean short-axis diameter was 15.07 mm on US and 14.40 mm on CT. The mean distance of the lesion to the skin was 20.80 mm on US and 33.97 mm on CT. All patients received conservative treatment and experienced complete resolution of symptoms within a week. The study found that ultrasound provided sufficient detail for diagnosing PEA without the need for additional imaging. The consistency of lesion size and location across imaging modalities suggested that US could be a reliable diagnostic tool. These findings supported the hypothesis that PEA is a self-limiting condition that does not require aggressive intervention.

The authors concluded that primary epiploic appendagitis (PEA) is an under-recognized but not rare condition that should be included in the differential diagnosis of acute abdomen. The study found that PEA typically presents with localized abdominal pain and a mild inflammatory response. The most common anatomical localization was the sigmoid-descending colon junction. The researchers proposed that ultrasound is a sufficient imaging modality for diagnosing PEA, as it provides accurate measurements of lesion size and location. They suggested that US could prevent unnecessary further imaging and mistreatment. The study also showed that PEA lesions are consistently smaller and closer to the skin on ultrasound compared to CT. All patients in the study recovered with conservative treatment, supporting the idea that PEA is self-limiting. The authors emphasized the importance of recognizing PEA to avoid overdiagnosis and overtreatment. They proposed that targeted sonographic examination could be a radiation-free and contrast-free alternative to CT in diagnosing PEA.