A: Answer key 1. C - HBeAg 2. A - Papillary carcinoma 3. A - Panacinar emphysema 4. A - Bronze skin 5. B - Basal cell carcinoma 6. B - Erythema nodosum 7. A - Apex of lungs 8. B - More cellular stroma 9. A - Chronic bronchitis 10. B - Coagulative necrosis 11. C - Textile workers 12. B - Crohn's disease 13. B - Foot processes 14. B - Benign prostatic hyperplasia 15. B - Development of Ewing's sarcoma 16. A - Leiomyoma 17. B - Chronic pulmonary congestion 18. B - Chronic pyelonephritis 19. B - Mucoepidermoid carcinoma 20. B - Schwannoma High-yield corrections: - Rheumatic fever has erythema marginatum, not erythema nodosum. - Heart failure cells are hemosiderin-laden macrophages in chronic pulmonary venous congestion. - Thyroidization of renal tubules is characteristic of chronic pyelonephritis.