i HISTOPATHOLOGY IMAGES Endometrial Stromal Sarcoma Figure 1: Gross presentation of endometrial stromal sarcoma. Intact bicornuate uterus appears heart - shaped. Figure 3: Microscopic view of endometrial stromal sarcoma with marked pleomorphic nuclei and marked mitosis (arrow) (H&E, 400x). Figure 2: Endometrial stromal sarcoma. Cut surface of uterus shows large necrotic mass obliterating the endometrial cavity and reaching up to isthmus. Figure 4: Microscopic view of high grade endometrial stromal sarcoma infiltrating the bundle of myometrium (arrow) (H&E, 100x). ii Metaplastic Carcinoma of Breast Figure 1: Gross appearance of mastectomy specimen with large prominent lump. Figure 3: Microscopic examination reveals pure squamous cell carcinoma–metaplastic carcinoma of breast (H&E, 100x). Figure 2: Cut surface of mastectomy specimen showin g large necrotic mass with hemorrhagic areas. Figure 4: Metaplastic carcinoma of breast showing nests of squamous cells infiltrating the stroma (H&E, 100x). Contributed by: Department of Pathology Dr. Akbar Niazi Teaching Hospital, Islamabad