A 60 year old man presents with an unusual chief complaint: he gets really itchy after he takes a bath. As you inquire further, you find other nonspecific complaints such as headache, weakness, dizziness, and excessive sweating. He also gets a weird sensation of burning pain in his hands and feet that's accompanied by erythema or cyanosis but he says that he feels a pulse when it happens. Past medical history is positive for peptic ulcer disease. On exam, you palpate a spleen and liver. You get back a CBC and well, all the numbers seem high. Here's a bone marrow biopsy stained for iron, 400x:
Challenge: What's the diagnosis?
1. What's the symptom of itchiness called?
2. What's the symptom of burning pain called?
3. What's seen on the histology image?
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