Medical term for 2 dimples above butt?

Factual Questions
1

Hi,
I was wondering what the medical term is for the two largish vertical dimples that are on either side of the spine, at the top of the butt? I think it is much more visible on some people compared to others.
Thanks.

2

Oddly I can remember this as a Playboy Advisor question from many, many years ago. They said they are called sacral dimples but a quick google search leads me to think that is incorrect as most references imply the sacral dimple is centered and a result of the spinal cord not fully closing in the fetus. The term didn’t turn up in an online search of Gray’s Anatomy, maybe QtM will enlighten us.

3

Padeye:
Thanks. I think both of those things are right.
It seems that sacral dimples are dimples due to the sacrum.
(the blue bones that make a triangular shape in this pic)
http://sprojects.mmi.mcgill.ca/postabdwall/image-vertebrae2a-sacrum.jpg
In the medical links I found, they seem to all be about a dimple at the tail bone, but sites that are about bikini’s or low-cut jeans are about the thing I’m talking about. Perhaps this is because that the higher dimples aren’t very medically interesting, while the lower ones aren’t very interesting as far as clothing goes.

4

I think the medical term is “ass-dimples”. It’s one of those deceptive-sounding medical terms like “feel like shit” and “you ought to see a doctor,” both of which I hear from Dr.J on a regular basis.

5

Personally, I favor the colorful “Dimples of Venus,” a legitimate eponym used in the scientific literature [e.g.]. “Sacral dimple” is also correct [ref: the chapter ;url=http://assets.cambridge.org/0521481104/sample/0521481104WSC00.pdf]“Surface Anatomy in Butler’s Radiological Anatomy, but as has been noted, this term is also used for a midline sacral dimple (which is broader than a stereotypic dimple in many people]. Since the sacral dimples are created by structures attached to the underlying sacral bone, they are only about 2” [5cm] to either side of the midline, and may not necessarily be the dimples you are referring to. A thin muscular individual may have other “dimples” in that region of their posterior surface as well.

Females, in particular, often display a dimple at the PSIC [posterior superior iliac crest - the “upper edge” of what is commonly called the hipbone] I supect this may be be the dimple you find most captivating while watching members of the fairer sex (which ever sex you deem that to be)

6

Note to self: preview again to make sure your corrections “registered” with the hamsters before submitting the post.[ref: the chapter “Surface Anatomy” in Butler’s Radiological Anatomy].

BTW, it’s not that physicians and anatomists find that area uninteresting. These dimples and points of attachment can actually be fairly important surface landmarks in clinical practice. It’s probably more that we use a variety of names, and abbreviations like PSIC, that aren’t exactly lay-friendly. We don’t do this to be obscure; “Posterior Superior Iliac Crest” is just a mouthful (and a pageful) for something we think of as basic.

7

Well here’s a pic
http://www.bikiniscience.com/help/exposures_SS/exposurecodes_S/exposurecodes.html

Note it contains cartoon nudity. (I had another picture but it has ads for a site on it)

The two dimples I’m talking about can be see near “A” in the picture and are partly covered by the bikini briefs. In the picture below in you can see the two dimples uncovered. In that picture they’re two little brown spots either side of the spine and butt crack.