Left: Retroflexed view of nonbleeding internal hemorrhoids. (Retroflexion causes the instrument to "look back" on itself entering the rectum from below.)
Center: Non-bleeding internal hemorrhoids in a 47 year-old man. (Retroflexed view.)
Right: Focal inflammation with erythema (redness) and superficial ulceration involving an internal hemorrhoid in a 62 year-old man with rectal pain and occult bleeding.
Left & Center: Cherry-red spot or hemocystic spot seen on a prominent internal hemorrhoid at retroflexion in a 71 year-old woman with a history of hematochezia. Similar to red spots seen on varices, this vascular spot represents a potential source of bleeding.
Right: Prominent internal hemorrhoids in a 71 year-old woman with occult bleeding and anemia.
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