In the subacute form of infective endocarditis, the vegetation may also include a center of granulomatous tissue, which may fibrose or calcify.
en.wikipedia.org Minerals are deposited in the matrix between the columns of lacunae and calcify the cartilage.
en.wikipedia.org Its skeleton is reduced and poorly calcified, the muscle blocks along its sides (myomeres) are weakly developed, and its fins are soft and small.
en.wikipedia.org Connecting rings are in general poorly calcified and may expand as siphonal bulbs into the chambers where not restricted by septal necks.
en.wikipedia.org The causative agents include bezoars, foreign bodies, trauma, intestinal worms, lymphadenitis, and, most commonly, calcified fecal deposits known as appendicoliths or fecaliths.
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