(Click to enlarge)Challenge: What is your diagnosis?
Image is in the public domain.
I put together these medical challenges. The cases are hypothetical and do not necessarily represent actual or typical presentations of medical diseases. Disclaimer is at the bottom of this page.
A 35 year old woman presents to her gynecologist and is incidentally found to have a cystic ovarian mass. She is asymptomatic, but ovarian cystectomy is recommended to prevent torsion, rupture, and a 0.2-2% chance of malignant transformation, usually into a squamous cell carcinoma.

In the third image, those black spots all appeared within the time span of weeks. The base of some of those lesions is erythematous. They are itchy.
These are two separate patients with the same disease. The other finding is hepatomegaly. When scanned, a liver mass is found. The patient, unfortunately, has dementia. His estranged daughter says, "Well, he had some sort of minor surgery years ago, but he never told me what it was for."
You are the surgeon on call at midnight and you're getting antsy because there aren't any good cases going on. You troll through the emergency department looking for appendices to remove and wander into the CT scan just as this image comes onto the screen. You're in business! You glance at the CT requisition and it says "65 year old man, back pain, hypotension."
Challenge: What's the most likely diagnosis?
The tongue shown here belongs to a 25 year old woman presenting to a primary care doctor. She recently got health insurance because of the new healthcare reform bill. Yay! She has no complaints. She is otherwise healthy, but had a lot of spontaneous recurrent nosebleeds in childhood. She takes no medications. She has a family history of embolic strokes (including one from a deep vein thrombosis in someone without a heart defect), recurrent GI bleeds, and cerebral abscess in every generation of her father's side. She does not smoke or do drugs, and she only drinks occasionally. She lives with her cat and works at the supermarket.