Important: A near-normal abdominal X-ray does
not rule out appendicitis, renal/ureteric stone, gastritis/ulcer disease, pancreatitis, early bowel obstruction, or other important causes of abdominal pain. Plain abdominal radiographs are frequently nonspecific; for undifferentiated acute abdominal pain, contrast CT abdomen-pelvis is generally the more appropriate initial imaging study when clinically indicated, per
ACR imaging guidance. This agrees with
Grainger & Allison’s Diagnostic Radiology, which notes that CT or ultrasound has replaced plain abdominal radiography in most acute-abdomen settings.
For a 26-year-old man, the next steps should be examination and targeted tests: CBC, CRP, electrolytes, urine analysis, lipase if epigastric pain, and ultrasound or CT based on pain location and examination. Free intraperitoneal air, when present, is a surgical emergency sign, but it is not evident in this image.