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25b - Answer: 47-year-old female is being evaluated for right disc dislocation

Pomeranz, Stephen
Stephen J Pomeranz, MD
Chief Medical Officer, ProScan Imaging. Founder, MRI Online
Includes DICOM files

HISTORY: 

This 47-year-old female is being evaluated for right disc dislocation.

(QUIZ ANSWER) NOT A FINDING IN THIS CASE: 

Right TMJ: In open-mouth position, there is capture of the articular disc.

Using the diagnostic web viewer, we have provided images that assist in telling our clinical story. Areas of significance are indicated below.

FINDINGS:

In reference to the left TMJ with closed-mouth position, the articular disc is noted to be dislocated anteriorly. With open-mouth position, normal degree of range of motion and capture of the articular disc. With open-mouth position, would expect the articular disc to be slightly more posteriorly located. 

In reference to the right TMJ with closed-mouth position, the articular disc is dislocated anteriorly. With open-mouth position, absence of capture of the articular disc with slightly limited range of motion. Concern for a perforation at the junction of the posterior band or posterior zone of the articular disc. 

CONCLUSION: 

Dislocation of each articular disc with closed-mouth position. Capture of the articular disc with open-mouth position demonstrated on the left. Continued dislocation of the right articular disc with open-mouth position. Concern for a perforation or tear of the posterior zone or posterior band of the right articular disc.

LESSON 2, TOPIC 75

Case Challenge: Temporomandibular Joint (TMJ) MRI Cases

Case Challenge

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Content reviewed: August 31, 2021

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