Book contents
- Frontmatter
- Contents
- List of contributors
- Foreword
- Preface
- Section 1 Shoulder
- Case 1 Pseudocyst of the humeral head
- Case 2 SLAP tear versus sublabral foramen/recess
- Case 3 SLAP tear versus normal variant of biceps labral complex
- Case 4 Labral tear versus hyaline cartilage undercutting
- Case 5 Buford complex of the shoulder
- Case 6 Pseudosubluxation of the shoulder
- Case 7 Posterior dislocation of the shoulder
- Case 8 Avulsion fracture of the greater tuberosity
- Case 9 Parsonage–Turner versus quadrilateral space syndrome
- Case 10 ABER positioning during MR arthrogram: anterior labral tears
- Case 11 Os acromiale
- Case 12 Hill–Sachs injury versus normal flattening of posterolateral humeral head
- Case 13 Red marrow versus tumor in the proximal humeral shaft
- Case 14 Kim's lesion
- Case 15 Internal impingement of the shoulder
- Section 2 Arm
- Section 3 Elbow
- Section 4 Forearm
- Section 5 Wrist
- Section 6 Hand
- Section 7 Hip and Pelvis
- Section 8 Thigh
- Section 9 Leg
- Section 10 Ankle
- Section 11 Foot
- Section 12 Tumors/Miscellaneous
- Index
- References
Case 13 - Red marrow versus tumor in the proximal humeral shaft
from Section 1 - Shoulder
Published online by Cambridge University Press: 05 July 2013
- Frontmatter
- Contents
- List of contributors
- Foreword
- Preface
- Section 1 Shoulder
- Case 1 Pseudocyst of the humeral head
- Case 2 SLAP tear versus sublabral foramen/recess
- Case 3 SLAP tear versus normal variant of biceps labral complex
- Case 4 Labral tear versus hyaline cartilage undercutting
- Case 5 Buford complex of the shoulder
- Case 6 Pseudosubluxation of the shoulder
- Case 7 Posterior dislocation of the shoulder
- Case 8 Avulsion fracture of the greater tuberosity
- Case 9 Parsonage–Turner versus quadrilateral space syndrome
- Case 10 ABER positioning during MR arthrogram: anterior labral tears
- Case 11 Os acromiale
- Case 12 Hill–Sachs injury versus normal flattening of posterolateral humeral head
- Case 13 Red marrow versus tumor in the proximal humeral shaft
- Case 14 Kim's lesion
- Case 15 Internal impingement of the shoulder
- Section 2 Arm
- Section 3 Elbow
- Section 4 Forearm
- Section 5 Wrist
- Section 6 Hand
- Section 7 Hip and Pelvis
- Section 8 Thigh
- Section 9 Leg
- Section 10 Ankle
- Section 11 Foot
- Section 12 Tumors/Miscellaneous
- Index
- References
Summary
Imaging description
In the adult, it is widely recognized that residual hematopoietic marrow is present throughout the axial skeleton. In addition, hematopoietic marrow is usually present within the proximal metaphyseal areas of the femur and humerus. Residual hematopoietic marrow may be observed within the proximal humeral epiphyseal area in normal adults. Hematopoietic marrow does not result in significant hyperintensity on images acquired with T2-weighted, fat-suppressed T2-weighted, or STIR sequences (Figure 13.1). Hematopoietic marrow is not associated with cortical destruction or an adjacent soft tissue mass. Hematopoietic marrow usually demonstrates bilateral symmetry, and evaluation of the contralateral extremity may be useful in problematic cases. The MR imaging characteristics of infiltrative lesions vary. All demonstrate some decreased signal intensity on T1-weighted images (Figure 13.2). Their appearance on T2-weighted sequences varies depending on tissue type, cellularity, water content, and the presence of fibrosis, necrosis, hematoma, or inflammatory debris.
Importance
Awareness of the normal physiologic variations of hematopoietic and fatty marrow distribution is important because these normal patterns can mimic marrow-based disease.
Differential diagnosis
Differential diagnosis includes marrow reconversion, marrow infiltration or replacement, myeloid depletion, and marrow edema.
Teaching point
When signal intensity variations are observed, the possibility of residual or reconverted hematopoietic marrow should be considered.
- Type
- Chapter
- Information
- Pearls and Pitfalls in Musculoskeletal ImagingVariants and Other Difficult Diagnoses, pp. 24 - 25Publisher: Cambridge University PressPrint publication year: 2013