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Open Access 23-02-2025 | Esophagus and Gastrointestinal Tract | Review

A pictorial essay on cross-sectional imaging findings of pathologies in the second (D2) segment of the duodenum in adults

Authors: Isil Basara Akin, Muhammed Enes Oguzturk, Bengisu Kandemir, Nihal Deniz Mentes, Canan Altay

Abstract

The duodenum, the initial segment of the small intestine, is divided into four parts: the superior (D1), descending (second) (D2), horizontal (D3), and ascending (D4) segments. Despite its short length, the descending part (D2 segment) holds clinical significance due to its anatomical proximity to structures such as the gallbladder, right kidney, colon, and pancreas. This anatomical localization and contiguity give rise to various pathologies, including congenital, inflammatory, infectious, neoplastic, vascular, and traumatic conditions. Cross-sectional imaging modalities play a pivotal role in evaluating pathologies of the second (D2) segment of the duodenum. This article aims to provide a comprehensive overview of these pathologies and delineate their imaging characteristics.

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Title: A pictorial essay on cross-sectional imaging findings of pathologies in the second (D2) segment of the duodenum in adults
Authors: Isil Basara Akin
Muhammed Enes Oguzturk
Bengisu Kandemir
Nihal Deniz Mentes
Canan Altay
Publication date: 23-02-2025
Publisher: Springer US
Keywords: Esophagus and Gastrointestinal Tract
Gastroenterological Radiology
Diagnostic Radiology
Computed Tomography
Magnetic Resonance Imaging
Pancreatitis
Diverticulitis
Intestinal Diverticulosis
Duodenal Ulcer
Gastrointestinal Infection
Chronic Inflammatory Bowel Disease
Duodenal Ulcer Perforation
Perforated Abdominal Trauma
Intestinal Polyps
Gastrointestinal Stromal Tumor
Neuroendocrine Tumor
Metastasis
Lymphoma
Published in: Abdominal Radiology
Print ISSN: 2366-004X
Electronic ISSN: 2366-0058
DOI: https://doi.org/10.1007/s00261-025-04846-7

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A pictorial essay on cross-sectional imaging findings of pathologies in the second (D2) segment of the duodenum in adults

Abstract

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