All changes occur in fibroid uterus. Except –
**Core Concept**
Fibroids, also known as uterine leiomyomas, are benign tumors of the smooth muscle layer in the uterus. They are a common cause of abnormal uterine bleeding, pelvic pain, and pressure symptoms in women. The pathophysiology of fibroids involves estrogen and progesterone stimulation, leading to cellular proliferation and growth.
**Why the Correct Answer is Right**
The correct answer is related to the histological changes that occur in fibroids. Fibroids typically exhibit increased cellularity, cellular atypia, and increased mitotic activity. However, they do not undergo malignant transformation, which is characterized by invasion of the myometrium and metastasis. This distinction is crucial in differentiating fibroids from uterine cancer.
**Why Each Wrong Option is Incorrect**
**Option A:** Cellular atypia is a characteristic feature of fibroids, which can make them difficult to distinguish from malignant tumors.
**Option B:** Increased mitotic activity is observed in fibroids, indicating rapid cell division and growth.
**Option C:** Fibroids do undergo degenerative changes, including cystic degeneration, hyaline degeneration, and red degeneration, due to rapid growth and outstripping of blood supply.
**Clinical Pearl / High-Yield Fact**
A key feature of fibroids is their potential to outgrow their blood supply, leading to degenerative changes. This can cause severe pain, vaginal bleeding, and other symptoms.
**Correct Answer:** D.