Good question - let me reconsider that carefully rather than dismiss it outright.
What a true patellar fracture looks like on X-ray (per Rockwood & Green's Fractures in Adults, Campbell's Operative Orthopaedics):
- A lucent (dark) line crossing the patella - vertical, horizontal, or comminuted - visible on AP, lateral, and ideally a tangential/"sunrise" view.
- Possible fragment displacement or gapping, especially if the retinaculum/extensor mechanism is torn.
- Comparison with the opposite knee is recommended, since normal anatomical variants (e.g., bipartite patella) can mimic a fracture line.
- Clinically: a palpable defect over the patella, hemarthrosis, and inability to perform a straight-leg raise support the diagnosis - X-ray alone isn't the whole picture.
Re-checking your image: The bright spot I flagged sits right over the joint/patellar region in the lateral view - which is exactly the area you'd need to inspect for a fracture line, so your question is fair. However, that spot is a solid, overexposed white blob with a halo/corona shape, not a dark lucent line through bone. A fracture line on X-ray is radiolucent (appears darker/black), not bright white. The blown-out white glare pattern, combined with the ceiling light fixture visible directly above in your photo, is classic for a reflection off the glossy film surface rather than an actual bony finding. If it were a true fracture, I'd expect to see a disrupted bone contour or a dark fracture line at the patella's margin even around the glare, not a totally saturated white patch replacing the anatomy.
That said, I can't rule it out with full confidence - because the glare directly obscures the exact area of interest, I genuinely can't see the patellar cortex underneath it in this photo.
What I'd suggest:
- Re-photograph that lateral film flat, away from the overhead light, so there's no reflection.
- If possible, get a tangential (sunrise) view of the patella - this is the dedicated view for detecting patellar fractures and isn't well seen on standard AP/lateral films.
- Ask if the patient has clinical signs suggestive of fracture - pain directly over the patella, palpable gap, swelling, or inability to actively extend/straight-leg-raise the knee. If any of those are present, patellar fracture should be actively worked up regardless of what the photo shows.
- Have the actual radiograph (not a photo of it) reviewed by the treating orthopedic doctor/radiologist - that's the only reliable way to confirm or exclude it.
If you can get a clearer, glare-free photo of that lateral film, I'm happy to take another look.