D anaplastic astrocytoma astrocytomas can arise near

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D Anaplastic astrocytoma = Astrocytomas can arise near the base of the brain, but they typically do not erode bone, nor do they contain calcifications.ECraniopharyngioma = A craniopharyngioma is a rare and sporadic neoplasm of older children and young adults. Craniopharyngiomas produce a mass effect in the region of thesella and can impinge upon the optic chiasm. They have histologically benign appearing tissue, but they erode and invade surrounding bone and can be difficult to remove completely. The term'crankcase oil' is used to describe the oily contents of cystic spaces within a craniopharyngioma.The microscopic features suggest embryologic origin from Rathke's pouch.F Osteosarcoma = Osteosarcomas, though common at this age, are likely to arise in long bones, not the skull.
Question 29
A 52-year-old man has weight of 4 kg over the past 6 months, along with bruises on his skin with even minor trauma and back pain. He has smoked 2 packs a cigarettes per day for 35 years. On physical examination he has obesity in a truncal distribution, plethora, and a blood pressure of 160/110 mmHg. A radiograph of the spine reveals a compressed fracture of T11. Which of the following neoplasms is he most likely to have?
Question 30A 41-year-old man has been drinking large quantities of water--up to 20 liters per day--for the past week. On physical examination he has diminished skin turgor and dry mucous membranes. Laboratory studies show sodium 162 mmol/L, potassium 4.1 mmol/L, chloride 121 mmol/L, and bicarbonate 27 mmol/L. His serum glucose is 75 mg/dL and creatinine 1.0 mg/dL. His serum osmolality is 343 mOsm/kg. A deficiency of which of the following hormones ismost likely present in this man?

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