**Core Concept**
The atticoantral variety of chronic suppurative otitis media is characterized by the involvement of the attic and antrum of the middle ear, often with associated mastoiditis. This condition requires a treatment approach that addresses the inflammatory and infectious processes in these areas.

**Why the Correct Answer is Right**
The treatment of choice for atticoantral chronic suppurative otitis media is mastoidectomy with or without tympanoplasty. This surgical procedure involves the removal of infected mastoid air cells and, in some cases, the repair of the tympanic membrane or ossicular reconstruction. The goal is to eliminate the source of infection, reduce inflammation, and restore hearing function. Mastoidectomy allows for the thorough debridement of infected tissue and the drainage of abscesses, which is essential for resolving the infection.

**Why Each Wrong Option is Incorrect**
**Option A:** Antibiotics alone may be insufficient for treating atticoantral chronic suppurative otitis media, as the infection can be deep-seated and resistant to medical therapy. While antibiotics may be used as an adjunct to surgery, they are not the primary treatment.
**Option B:** Tonsillectomy is not a standard treatment for atticoantral chronic suppurative otitis media, as the condition is not primarily caused by tonsillar infection. While tonsillitis can be associated with otitis media, the two conditions require distinct treatment approaches.
**Option C:** Corticosteroids may be used to reduce inflammation in otitis media, but they are not the primary treatment for atticoantral chronic suppurative otitis media. In fact, corticosteroids may even exacerbate the infection if used inappropriately.

**Clinical Pearl / High-Yield Fact**
Remember that atticoantral chronic suppurative otitis media often requires surgical intervention to treat the underlying infection and inflammation. A thorough knowledge of otologic anatomy and the indications for mastoidectomy is essential for managing this condition effectively.

**Correct Answer: C. Mastoidectomy with or without tympanoplasty.**