This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
In actinomycosis of the spine, the abscess usually erodes into which of the following structures? 
Select and explain. 
A. Towards the skin, B. Interveebral disc, C. Into the pleural cavity, D. Into the reteropritoneal space
A: Towards the skin
Answer: A: Towards the skin 
Explanation: Actinomycosis is most commonly caused by Actinomyces israelii. It is characterized by the presence of abscess with sinus tracts leading to the skin. Ref: Diagnostic Radiology : Musculo-Skeletal and Breast Imaging By Jaypee Brothers, 2nd Edition, Page 141.