Related Experiment Video
Updated: Apr 28, 2026

Intraoperative Ultrasound in Spinal Surgery
Published on: August 17, 2022
Infected primary paraspinal hydatidosis with water lily sign
Sema Yildiz1, Emin Komur, Zeynep Akti
1Department of Radiology, Harran University School of Medicine, Sanliurfa, Turkey.
Background:
Primary muscular hydatidosis is extremely rare, and the diagnosis of the infected muscular hydatid cyst can be difficult due to atypical clinical and radiological findings.
Case Report:
We present herein an interesting case of a 24-year-old man with primary infected muscular hydatid cyst located in the paraspinal muscles eroding the right lamina of C6 vertebra that was diagnosed with water lily sign on computed tomography.
Conclusion:
Water lily sign is a pathognomonic imaging finding for hydatidosis, and defined when free-floating endocyst is seen. Cyst hydatid should always be considered in the differential diagnosis of any soft tissue mass of the patients from endemic regions.
Related Concept Videos
Appendicitis-I: Introduction
Etiology: Appendicitis can arise from various causes, primarily rooted in the obstruction of the appendix lumen. Factors contributing to this obstruction include fecal accumulation, lymphoid hyperplasia and, in...
Nephrotic Syndrome I : Introduction
Appendicitis
Cirrhosis I: Introduction

