Journal of Medical Ultrasound

: 2020  |  Volume : 28  |  Issue : 2  |  Page : 130--131

A runner with right lateral knee pain

Shaw-Gang Shyu1, Mathieu Boudier-Revéret2,  
1 Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Taipei, Taiwan
2 Department of Physical Medicine and Rehabilitation, University of Montreal Health Center, Montreal, Canada

Correspondence Address:
Dr. Mathieu Boudier-Revéret
Department of Physical Medicine and Rehabilitation, University of Montreal Health Center, Montreal

How to cite this article:
Shyu SG, Boudier-Revéret M. A runner with right lateral knee pain.J Med Ultrasound 2020;28:130-131

How to cite this URL:
Shyu SG, Boudier-Revéret M. A runner with right lateral knee pain. J Med Ultrasound [serial online] 2020 [cited 2022 Oct 2 ];28:130-131
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Full Text

 Section 1 – Quiz

This is the case of a 45-year-old male without known systemic disease. He participated in a few marathons and triathlons in the past 2 years. However, he gradually felt dull and discomfort just over his right lateral knee in the last 4 months, especially the days after his running or bicycling. He reported no known significant trauma or contusion over his right knee. He described his pain as being poorly localized, deep, and occasionally aching. On examination, muscle strength, sensation, and deep tendon reflexes of the bilateral lower limbs were normal and symmetric. Knee range of motion was full, without significant evidence of intra-articular effusion. Meniscal tests were negative, and on palpation, the most tender point seemed to be over the proximal tibiofibular joint (PTFJ).

He was then referred to the physiatrist clinic for a musculoskeletal ultrasonography to better assess the area of tenderness at the anterolateral knee.

The significant findings were a 6.7 mm × 5.7 mm × 9.0 mm cystic multilobulated lesion with anechoic content emerging both anteriorly and posteriorly from the right PTFJ [Figure 1], [Figure 2], [Figure 3], [Figure 4], [Figure 5]. Power Doppler was negative [Figure 2], and the cyst was noncompressible. No cortical irregularity was noted at the PTFJ. The remainder of the right knee ultrasound examination was within normal limits, including evaluation of the iliotibial band and biceps femoris.{Figure 1}{Figure 2}{Figure 3}{Figure 4}{Figure 5}

Magnetic resonance imaging was performed within a month to confirm the diagnosis [Figure 6], [Figure 7], [Figure 8].{Figure 6}{Figure 7}{Figure 8}

With the information provided, the reader should be able to make the diagnosis and establish potential treatment options.

 What Is the Diagnosis?

Declaration of patient consent

The authors certify that they have obtained appropriate patient consent form. In the form, the patient has given his consent for his figures and other clinical information to be reported in the journal. The patient understands that his name and initial will not be published, and due efforts will be made to conceal his identity, but anonymity cannot be guaranteed.

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Conflicts of interest

There are no conflicts of interest.