# Ultrasound Animal Challenge 2 – Which pathology does the “snake sign” describe?

## Metadata
- Content type: Blog
- Canonical URL: https://123sonography.com/blog/ultrasound-animal-challenge-2-snake-sign
- Published: September 19, 2022
- Last updated: July 2, 2024

## Overview
Are you ready for more ultrasound teaching points related to animals? Are you good with reptiles?

## Snapshot
- Category: Cases

## Authors
- [Univ. Prof. Dr. Thomas Binder](/speaker/146) - Medical University of Vienna and founder/CMO 123Sonography, Webinar Moderation

## Tags
- Echo

## Related Courses
- [Echo BachelorClass](/course/echobachelorclass)

## Content
Are you ready for more ultrasound teaching points related to animals? Are you good with reptiles?

![Red snake with brown spots.](https://123sonography.com/sites/default/files/styles/article_image/public/image/images/us-animal-challenge-snake.png?itok=-rygw84B)

## Which pathology does the “snake sign” describe?

[![](https://123sonography.com/sites/default/files/styles/video_thumbnail/public/video/images/snake-sign1.png?itok=eyrg9B9b)](https://vimeo.com/751202613&title=0&byline=0&portrait=0)

**A) Heartworm**

**B) Vegetation caused by parasites**

**C) Thrombus in the right atrium originating from the IVC or femoral veins**

**D) Dislodged Atrial septal occlude moving freely in the right atrium**

Want to know the answer? [**Get it here!**](https://123sonography.com/blog/ultrasound-animal-challenge-2-answer)

**Yours,**
**Thomas Binder and the 123sonography team**