Related Experiment Video
Updated: Jan 25, 2026

Endoscopic Ultrasound-Guided Biliary Drainage: Endoscopic Ultrasound-Guided Hepaticogastrostomy in Malignant Biliary Obstruction
Published on: March 25, 2022
Unusual Case of Obstructive Jaundice
Rajesh Essrani1, Eric Nellis2, Patrick Hickey2
1Internal Medicine, Lehigh Valley Health Network, Allentown, USA.
Abstract:
Most malignant obstructive jaundice arises from primary periampullary tumors and rarely from metastatic cancer of the head and neck. A 60-year-old male was diagnosed with obstructive jaundice due to metastatic squamous cell carcinoma of the tonsil. Only 12 cases of small bowel metastasis from the head and neck have been reported. Most of them originate from laryngeal squamous cell carcinoma, and only one case reported tonsillar cancer metastasizing to the ileum. Our case is the first one, to the best of our knowledge, to illustrate tonsillar cancer with metastasis to the duodenum causing obstructive jaundice.
Related Concept Videos
Unusual Results
According to the range rule of thumb, any value above or below two standard deviations, 2σ from the mean, μ is considered unusual.
Maximum unusual value =...
z Scores and Unusual Values
This score indicates how far a value is from the mean in terms of standard deviation. For example, if a data value has a z score of +1, the researcher can infer that the particular data value is one standard deviation above the mean. If another data...
Chronic Obstructive Pulmonary Disease
Smoking is a primary risk factor for COPD, with over 80% of patients having a history of it. Patients typically experience progressive dyspnea or labored breathing, frequent coughing, and recurrent pulmonary infections. Many eventually succumb to respiratory failure, characterized by...
Design Example: Measuring Distance Between Two Points with Obstructions
Chronic Obstructive Pulmonary Disease-II: Pathophysiology
Chronic Inflammation
Chronic Obstructive Pulmonary Disease-I: Introduction

