Catechism (Quiz 25)

A 43-year-old lady presented with abnormal uterine bleeding. She underwent ultrasonography, followed by a total abdominal hysterectomy, elsewhere. The paraffin blocks were submitted for a review. Ultrasonogram revealed a bulky uterus measuring 7.9 cm x 7.6 cm x 6.2 cm. A large mass was noted in the anterior wall of the fundal region with cystic degeneration. Questions Q1. What is the diagnosis? Q2. What immunostains are supportive for a diagnosis? Q3. What is the closest differential diagnosis? Q3. Is there any molecular test that is desirable for this diagnosis?Figure 1Figure 2