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Yolk sac tumor of the endometrium is an uncommon neoplasm. Here we report a case of yolk sac tumor arising in a uterine carcinosarcoma, with the carcinomatous component showing both endometrioid and serous components, and the sarcomatous component showing homologous (spindled) differentiation. The yolk sac tumor showed predominant glandular configuration and was present admixed with the epithelial components. Extensive immunostaining was performed to narrow the differential diagnosis, including potentially therapeutic testing for HER-2. To our knowledge, this is the first case of carcinosarcoma with this mix of epithelial components and corresponding reporting of these immune and therapeutic markers.

Atypical polypoid adenomyoma is an uncommon polypoid lesion, located in the lower uterine segment or endometrial cavity, often diagnosed on biopsy or curettage.[1][1] It is characterized by endometrial glands, often with prominent squamous morules, embedded in a fibromyomatous stroma, reminiscent of

Medical practice requires physicians to have a broad understanding of the basic sciences, have competent clinical skills, and have an ability to practice in evolving health systems in a cost-effective and evidence-based manner. Essential to the practice of medicine is an understanding of the common laboratory tests and the ability to use them effectively. The Essential Laboratory Tests for Medical Education (ELTME) is a concise document explaining the pathophysiology of common laboratory tests and clinical context for each test and was developed in response to an expressed need from medical students, residents and fellows, and medical educators. The ELTME is linked to the Pathology Competencies in Medical Education and its third competency of diagnostic medicine and therapeutic pathology. The ELTME table is a document of common laboratory tests in alphabetical listing. Laboratory tests may be easily queried by name or organ system, and with simple editing tools, new tables may be constructed to fit the needs of individual curricula or learners. Furthermore, the table may be easily expanded by educators who wish to add specific tests to complement their curricula.