A member asked:

My 26-year-old son has a skull that has depression between the skull joints from the middle part down to the back, and and both right and left side. ?

8 doctors weighed in across 2 answers

Normal variation: The cranial sutures close by about 2 years of age. They may close in a strange manner that leaves ridges and bumps that are usually symmetry between the left and right. Often these are not noted until there is some hair loss or he cuts his hair short. They have been there since infancy.

Answered 10/12/2021

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Occipital notches: what you are describing is the pair of accipital notches at the base of the skull, behind the mastoid bones. Normal finding

Answered 6/29/2015

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