# Ultrasound Animal Challenge Halloween Special – Bat sign

## Metadata
- Content type: Blog
- Canonical URL: https://123sonography.com/blog/cases/ultrasound-animal-challenge-halloween-special-bat-sign
- Published: October 30, 2023

## Overview
What is meant by the “bat sign” in ultrasound?

## Snapshot
- Category: Cases

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

## Content
###

For this year's Halloween edition of our Ultrasound Animal Challenge, you do not only get to solve a quiz, but can also benefit from [**-20% off all courses**](https://123sonography.com/halloween-offer)! Can you navigate through this quiz even in the dark?

## What is meant by the “bat sign” in ultrasound?

![Bat sign ultrasound image.](https://123sonography.com/sites/default/files/styles/article_image/public/image/images/bat-sign-image.png?itok=q1FlWS6M) **A) When you can only detect a certain pathology in the dark**

**B) Pneumothorax**

**C) Too much gas in the colon**

**D) Normal relationship between the pleura and the ribs on ultrasound**

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

**Yours,**

**Thomas Binder and the 123sonography team**

PS: If you missed the previous Animal Challenge posts you can always visit our “zoo”:

- [Tiger-stripe Sign](http://123sonography.com/blog/ultrasound-animal-challenge-1-%E2%80%93-what-tiger-stripe-sign)
- [Snake Sign](http://123sonography.com/blog/ultrasound-animal-challenge-2-snake-sign)
- [Tail of a Whale](http://123sonography.com/blog/ultrasound-animal-challenge-3-tail-of-whale)
- [Butterfly Sign](http://123sonography.com/blog/ultrasound-animal-challenge-4-butterfly-sign)
- [Bunny Sign](http://123sonography.com/blog/ultrasound-animal-challenge-5-bunny-sign)
- [Spider Web](https://123sonography.com/ultrasound-animal-challenge-halloween-spider-sign)