From Wikipedia, the free encyclopedia. The following is a list of the world's largest cruise ships over 100,000 gross tonnes, including ships that are in service, under construction, and out of service.Ships are ranked by gross tonnage.rom Wikipedia, the free encyclopedia. The following is a list of the world's largest cruise ships over 100,000 gross tonnes, including ships that are in service, under construction, and out of service. Ships are ranked by gross tonnage.
Advanced clubbing is obvious, but early clubbing may be difficult to diagnose. Clubbing is present if the transverse diameter of the base of the fingernail is greater than the transverse diameter of the most distal joint of the digit. The nail base angle measures more than 160Â°.
With late clubbing there is visible swelling and the angle exceeds 180Â° and tissues are shiny and tense. With severe clubbing there is swelling of the terminal part of the digit causing it to appear like a drumstick. Rounding and beaking of the distal nail bed in the absense of other signs of clubbing is familial and not indicative of disease. Clubbing is usually painless and patients and family members may not notice.