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Duodenal Mass Lesions - Differential Diagnosis
- Prolapsing Gastric Polyp
- Heterotopic Gastric Mucosa
- Brunner Gland Hyperplasia
- Lymphoid
Duodenal Mass Lesions ... Polyp - Villous Adenoma ... Duodenal #Mass #Lesions
Serrated Polyps
Hyperplastic polyps (HPs):
 • Prevalence: 20-30%
 • Size: Usually small or diminutive (s 5mm)
 •
Sessile serrated lesions ... Traditional serrated adenomas
Polyp Incidence on Colonoscopy
Tubular adenoma - 47.2%
Hyperplastic polyp - 16.0%
Tubulovillous adenoma - 17.6%
Normal - 5.6%
Inflammatory polyp
Colonoscopy Tubular adenoma ... Tubulovillous adenoma ... Sessile serrated lesion ... Traditional serrated adenoma ... 0.4% Villous adenoma
Appearance of Liver Lesions on Computed Tomography (CT) - Arterial Phase, Portal Venous Phase and Delayed
Appearance of Liver Lesions ... Hepatocellular adenoma ... Metastasis #Liver #Lesions
Appearance of Liver Lesions on Various Imaging Modalities
 • Computed Tomography (CT) - Arterial Phase, Portal
Appearance of Liver Lesions ... Hepatocellular adenoma ... Metastasis #Liver #Lesions
Breast Discharge - Differential Diagnosis Algorithm
High Prolactin + Normal TSH
 • Microprolactinoma
 • Steroid Hormone Intake
Stalk Compression/Lesion ... • Lactotroph Adenoma
Mediastinal Mass - Differential Diagnosis
Anterior Mediastinal Mass:
 • Thymus (Thymoma, carcinoma, hyperplasia, cyst)
 • Lymphoma
 •
thyroid, Parathyroid adenoma ... Thoracic spine lesions
Causes of Secondary Amenorrhea - Differential Diagnosis Algorithm
Absence of menses for more than 3 cycles or
• Infiltrative lesions ... • Pituitary Adenoma ... • Infiltrative Lesions
Causes of Metabolic Alkalosis: Differential Diagnosis
ECF volume contracted: urine chloride concentration <20 meq/L
 • Gastric alkalosis:
• Some villous adenomas ... hyperaldosteronism (unilateral adenoma ... furosemide-like lesion
Appearance of Liver Lesions on Contrast Enhanced Ultrasound - Early arterial, Grayscale phase, Late arterial phase,
Appearance of Liver Lesions ... Hepatocellular adenoma ... Metastasis #Liver #Lesions