DTN is a major source of fibers in the mammillary peduncle. Chronic cases can present the atrophy of the mammillary bodies. Amnesia can be a result of disconnection of the mammillary bodies from the Papez circuit. Drusy crusts of tiny intergrown crystals are common, also encrustations and mammillary or botryoidal surfaces. It forms botryoidal to mammillary clay-like masses. Zaratite crystallizes in the isometric crystal system as massive to mammillary encrustations and vein fillings. The crystal habit is as platy and mammillary encrustations on its matrix. In spite of this the exact function of the mammillary bodies is still not clear. These are a lateral cosiform process, a mammillary process and an accessory process. In "Macroolithus", the continuous layer is two to three times thicker than the mammillary layer. The inner layer, called the mammillary layer, is made of tightly-packed cones called mammillae. The mammillary bodies are an important part of the Papez circuit. These expansions on the neural spines have been termed mammillary processes. Neuroanatomists have often categorized the mammillary bodies as part of the hypothalamus. The costiform is lateral, the mammillary is superior (cranial), and the accessory is inferior (caudal).