Mucinous, papillary, cribriform, and tubular carcinomas have longer survival, and lower recurrence rates. The main ones are tufting, micropapillary, cribriform, and flat. The tumors are cellular, arranged in solid, cystic, cribriform, glandular, and single cell patterns. The ethmoid fracture can produce bone fragments that penetrate the cribriform plate. Aging can cause the openings in the cribriform plate to close, pinching olfactory nerve fibers. They lie medial to the femoral vein under the cribriform fascia. It then moves forward and passes through the cribriform plate to enter the nasal cavity. Olfactory receptor neuron axons project through the cribriform plate to the olfactory bulb. The ethmoid has three parts&colon; cribriform plate, ethmoidal labyrinth, and perpendicular plate. This valve may be double or it may be cribriform. Perforating vessels originates from lamina dura and the vessels perforate the socket wall (cribriform plate). A similar condition, cribriform hymen, is diagnosed when the hymen contains many minute openings. The cribriform plate is ossified partly from the perpendicular plate and partly from the labyrinths.