By Josh Stillman
September 05, 2012 at 07:19 PM EDT

Young adult novelist Judy Blume has been privately struggling with breast cancer since June.

Doctors for the 74-year-old author, known for such titles as “Are You There God? It’s Me, Margaret” and “Blubber,” discovered early stages of invasive ductal carcinoma during a routine ultrasound of dense breast tissue. Last month she underwent a mastectomy with reconstruction.

“Caught it just in time,” she wrote this morning on her blog. “No other treatment necessary.”

Invasive ductal carcinoma is the most common form of breast cancer, affecting 80% of those diagnosed. It is generally treated with a mastectomy, or with a lumpectomy and radiation. Blume opted for the former due to her age and physical shape. According to her blog, the surgery went smoothly and was relatively painless.

“Now it’s one month post surgery,” she wrote.  “I’m still in NY and feeling stronger every day.”

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