Spina bifida occulta

Specimen demonstrating incomplete fusion of the sacrum (notice the S1 region).  This was most likely from an individual who was asymptomatic or had mild symptoms.  This form of spina bifida is known as spina bifida occulta.

Notice the median sacral crest of the S1 region showing incomplete fusion (picture taken with a RX100m4)
Anterior surface of sacrum from the specimen above (picture taken with a RX100m4)

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