A 14-year-old girl has a 3-cm intramedullary well circumscribed lesion which has central lucency with a thin sclerotic rim.  A bone biopsy show scattered trabeculae of woven bone in a background of fibroblastic proliferation.  What is the most likely diagnosis?

A 55-year old male who presents with dysphagia and odynophagia is found to have an esophageal tumor that upon biopsy is diagnosed as squamous cell carcinoma. Which of the following is a risk factor associated with the development of this pathology?

Which of the following statements is CORRECT regarding the oral cavity.

Cervical lesions exhibiting carcinoma and high grade dysplasia are usually associated with Human papilloma virus types:

The ectocervix projects into the _____, which is at the proximal end of the vagina.

Suggest a diagnosis for the pathology being portrayed above.

What should be described when grossing in a liver with a primary tumor that is located at the liver’s capsule?  This detail could result in a medical emergency for the patient. Choose the BEST answer. 

_______________ is the site of blood exchange with the functional liver parenchyma.

The layer of the descending colon identified by the number “4” contains ____.

Synthesis of Vitamin D3 in the skin requires ______.