Related Experiment Video
Updated: Jul 29, 2025

Author Spotlight: Development and Evaluation of a Compound Acne Rodent Model Using C. acnes and Oleic Acid
Published on: November 1, 2024
I saw the sign: Go nuts, it's the "acorn cyst" sign
1Mayo Clinic Florida, Department of Radiology, Jacksonville, FL, USA.
Abstract:
The "acorn cyst" sign is an imaging sign encountered on breast ultrasound exams denoting a type of benign complicated cyst. An acorn cyst is comprised of a deep anechoic fluid portion (the "acorn") and a more superficial echogenic layer of material (the "acorn cap"). Radiologists should attempt to distinguish the acorn cyst from more suspicious complex cystic and solid masses; if unable to do so, aspiration/biopsy can be performed to exclude a malignant lesion.
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...
Urologic Endoscopic Procedure: Cystoscopic Examination
Aneurysm II: Clinical Manifestations and Diagnostic Studies
Acute Pancreatitis I: Introduction
Acute pancreatitis is characterized by rapid inflammation of the pancreas, often caused by factors like gallstone blockage or excessive alcohol consumption. Chronic pancreatitis, on the other hand, is a slow, progressive inflammation that may result from long-term alcohol abuse, obstructions in the pancreatic duct, or genetic factors.
The causes of acute pancreatitis include:
Assessment of the Rectum and Anus
Rectal Inspection
Begin by inspecting the perianal and anal areas for color, texture, rashes,...
Assessment of the Abdomen II: Percussion
Percussion
Percussion is an essential...

