concernings regarding cam type FAI

Hello dear ocaders!

This is a patient that I know. She is a good physiotherapist and has lots
of problems with her hips. She wrote: “I always have pain which radiates to
the groin. I also feel pain in flexion and external rotation, as well as
hip abduction”.

First question: I don’t see Cam type deformity. But her femoral heads are
not quite spherical as I am used to see. Does anyone agree with me? I
pointed out my concern with some arrows in image, but I actually
don’t think that this would cause impingement. She has MRI which
demonstrates labral tears that can explain her pain, but still, I don´t
like her bone morphology.

Second question: Forget about my case. After I watched Henry Bone Ellis
lecture here in OCAD, I am wondering about soft Cam. Does anyone “believe”
in that? Has seen a case? Does have literature to share?

Third question: I couldn´t ask Dr. Henry about lateral cam. My hip
orthopedist told me that about 5% of patients with cam have an anterior
“bump” that extends laterally (a “lateral” cam). Is there any measure for
that? I just find omega angle in literature, which I find very complicated
to reproduce in daily practice.

Thanks to all. Have a great day!

Karina Todeschini

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2 thoughts on “concernings regarding cam type FAI”

  1. OCAD

    (this is from Dr. Ellis)

    Thank you for your comments on FAI and my talk last month. Your questions are fantastic! I hope I can adequately answer then but please reach out with additional questions

    Completely agree with your thoughts on these radiographs. Although we often time talk about a traditional CAM that cause impingement/labral tears, but often times there are more factors that include acetabular morphology. Sometimes a aspherical femoral head (although not classic cam) can cause labral tears and impingement. I would not call this a cam lesion though.

    Soft CAM: I have presented this case series at the International Society of Hip Preservation and have not seen it described elsewhere. Although we are submitting the manuscript within the week, I still have a lot to learn to figure out if this is real.

    For the far lateral cam, I typically measure the alpha angle on the AP pelvis.

    Henry Bone Ellis, Jr., M.D.
    Texas Scottish Rite Hospital For Children

    Associate Professor, University of Texas Southwestern
    Pediatric Orthopaedic / Sports Medicine
    http://www.scottishritehospital.org/sports
    Henry.Ellis@tsrh.org

  2. todeschinikarina

    Hello ocaders!

    I had some nice replies to my e-mail. Hilary has sent to Dr Ellis himself
    (thanks, Hilary!!), which brought some value information, pasted bellow.
    After I realize that this patient has fovea alta, maybe a mild dysplasia;
    Roar Petersen agreed with me. Others think she has acetabular retroversion,
    which I am personally not sure.
    Thanks to everyone, this group is great!

    Thank you for your comments on FAI and my talk last month. Your questions
    are fantastic! I hope I can adequately answer then but please reach out
    with additional questions

    1. Completely agree with your thoughts on these radiographs. Although
    we often time talk about a traditional CAM that cause impingement/labral
    tears, but often times there are more factors that include acetabular
    morphology. Sometimes a aspherical femoral head (although not classic cam)
    can cause labral tears and impingement. I would not call this a cam lesion
    though.
    2. Soft CAM: I have presented this case series at the International
    Society of Hip Preservation and have not seen it described elsewhere.
    Although we are submitting the manuscript within the week, I still have a
    lot to learn to figure out if this is real.
    3. For the far lateral cam, I typically measure the alpha angle on the
    AP pelvis.

    Em ter., 9 de mar. de 2021 às 10:27, Karina <todeschinikarina@gmail.com>
    escreveu:

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