Which organs are associated with diaphragmatic irritation?

Which organs are associated with diaphragmatic irritation?

• A. Stomach
• B. Liver, gallbladder, and duodenum
• C. Pancreas
• D. Spleen

Answer: (B)

Diaphragmatic irritation often presents as referred pain in the shoulder because the diaphragmatic pleura and peritoneum are innervated by the phrenic nerve (C3–C5, especially C4). When subdiaphragmatic organs irritate the diaphragm, this sensory information is referred to the shoulder region. The organs most commonly linked to diaphragmatic irritation are the liver, gallbladder, and the duodenum because they lie directly beneath the diaphragmatic surface. The liver covers the right hemidiaphragm; the gallbladder rests on the inferior surface of the liver; and the superior portion of the duodenum lies just under the right diaphragm. Inflammation or distension of these structures can irritate the diaphragmatic peritoneum, producing referred pain to the right shoulder area. While other organs like the spleen can also cause diaphragmatic irritation (often with left shoulder pain), the liver, gallbladder, and duodenum are the classic subdiaphragmatic sources.

Diaphragmatic irritation often presents as referred pain in the shoulder because the diaphragmatic pleura and peritoneum are innervated by the phrenic nerve (C3–C5, especially C4). When subdiaphragmatic organs irritate the diaphragm, this sensory information is referred to the shoulder region.

The organs most commonly linked to diaphragmatic irritation are the liver, gallbladder, and the duodenum because they lie directly beneath the diaphragmatic surface. The liver covers the right hemidiaphragm; the gallbladder rests on the inferior surface of the liver; and the superior portion of the duodenum lies just under the right diaphragm. Inflammation or distension of these structures can irritate the diaphragmatic peritoneum, producing referred pain to the right shoulder area. While other organs like the spleen can also cause diaphragmatic irritation (often with left shoulder pain), the liver, gallbladder, and duodenum are the classic subdiaphragmatic sources.