Complex sentence: Warts caused by subgroup B viruses have a cauliflower-like appearance and can attain the size of a fist; most common on the head, neck and shoulders, they may also occur in other locations.
Split into simpler sentences: Warts caused by subgroup B viruses have a cauliflower-like appearance and can attain the size of a fist. Most common on the head, neck and shoulders, they may also occur in other locations.