0:00

<v ->And then, a third entity

0:03

we know as Mueller-Weiss Syndrome.

0:06

We describe this particular phenomenon, we called it

0:10

spontaneous osteonecrosis of the tarsal navicular bone

0:15

in adults.

0:16

This is not Kohler's Phenomenon,

0:19

that we see in young persons.

0:22

But what we saw, both imaging wise and histology,

0:27

was collapse of the navicular bone.

0:30

Especially, laterally.

0:33

Which histologically showed areas of osteonecrosis.

0:37

So we would have this triangular appearance

0:40

of the navicular bone.

0:42

So our belief when we saw it was that this was osteonecrosis

0:46

but it was of interest.

0:48

We saw it in patients with chronic renal disease,

0:51

patients on steroids, patients with diabetes.

0:55

And now it is believed that it is multifactorial.

1:00

For example, here's a 17 year old male, rugby player,

1:04

that shows Mueller-Weiss Syndrome.

1:07

This probably relates to a stress fracture

1:10

with fragmentation of bone.

1:12

Here we're dealing with a middle-aged diabetic man,

1:16

so here we're dealing with fracture

1:18

and fragmentation Mueller-Weiss

1:21

that looks more like an insufficiency fracture

1:25

or neuropathic disease.

1:27

So this may not be a spontaneous osteonecrosis of bone.

Mueller-Weiss Syndrome

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0:00

<v ->And then, a third entity

0:03

we know as Mueller-Weiss Syndrome.

0:06

We describe this particular phenomenon, we called it

0:10

spontaneous osteonecrosis of the tarsal navicular bone

0:15

in adults.

0:16

This is not Kohler's Phenomenon,

0:19

that we see in young persons.

0:22

But what we saw, both imaging wise and histology,

0:27

was collapse of the navicular bone.

0:30

Especially, laterally.

0:33

Which histologically showed areas of osteonecrosis.

0:37

So we would have this triangular appearance

0:40

of the navicular bone.

0:42

So our belief when we saw it was that this was osteonecrosis

0:46

but it was of interest.

0:48

We saw it in patients with chronic renal disease,

0:51

patients on steroids, patients with diabetes.

0:55

And now it is believed that it is multifactorial.

1:00

For example, here's a 17 year old male, rugby player,

1:04

that shows Mueller-Weiss Syndrome.

1:07

This probably relates to a stress fracture

1:10

with fragmentation of bone.

1:12

Here we're dealing with a middle-aged diabetic man,

1:16

so here we're dealing with fracture

1:18

and fragmentation Mueller-Weiss

1:21

that looks more like an insufficiency fracture

1:25

or neuropathic disease.

1:27

So this may not be a spontaneous osteonecrosis of bone.

Report

Faculty

Donald Resnick, MD

Professor Emeritus, Department of Radiology

University of California, San Diego

Carlos H. Longo, MD

Head of Radiology

Hospital Beneficência Portuguesa de São Paulo

Abdalla Skaf, MD

Head of the Department of Diagnostic Imaging Hospital HCor / Medical director of ALTA diagnostics (DASA group)

HCOR / DASA / TELEIMAGEM

Rodrigo Aguiar, MD, PhD

Professor of Radiology

Federal University of Paraná - Brazil

Marcelo D’Abreu, MD

Head of Radiology

Hospital Mae de Deus

Lesson

Synovial Joints Welcome and Faculty Introduction

Lesson

Transient Osteoporosis

Lesson

Osteonecrosis Part 1

Lesson

Case Review with Dr. Donald Resnick and Dr. Abdalla Skaf Part 1

Lesson

Osteonecrosis Part 2

Lesson

Case Review with Dr. Donald Resnick and Dr. Abdalla Skaf Part 2

Lesson

Subchondral Insufficiency Fractures

Lesson

Dr. Donald Resnick and Dr. Abdalla Skaf Part 3

Lesson

Chondral, Osteochondral and Subchondral Injuries

Lesson

Case Review with Dr. Donald Resnick and Dr. Abdalla Skaf Part 4

Mueller-Weiss Syndrome