I have not yet xrayed anyone for a Severs diagnosis. I don't think it is neccesary if you get positive squeeze tests and heel raise tests. Why would you subject kids to radiation that is not really needed or beneficial to the diagnosis.
I agree - Severs is a clinical diagnosis for me, based on history and clinical tests.
I have never requested x-ray unless Severs is not the likely cause.
I had one patient who appeared to have Severs but the history just didn't fit.
MRI showed Bone Marrow Oedema and he was diagnosed with Juvenille Arthritis.
On the initial presentation of Sever's disease, I will not perform routine radiographs.
However, if the patient does not respond appropriately to normal conservative treatment (i.e. heel lifts, reduced running, icing, gradual Achilles tendon stretching, and no barefoot walking) then I believe it is important to rule out other causes of heel pain with radiographs of the feet.
Is radiographic evaluation necessary in children with a clinical diagnosis of calcaneal apophysitis (sever disease)?
Rachel JN, Williams JB, Sawyer JR, Warner WC, Kelly DM. J Pediatr Orthop. 2011 Jul-Aug;31(5):548-50.
Sever’s Injury
A Clinical Diagnosis Stefan Perhamre, Dagmara Lazowska, Sofia Papageorgiou, Fredrik Lundin, Maria Klässbo and Rolf Norlin J Am Podiatr Med Assoc 103(5): 361–368, 2013