Radiography, MRI, CT, Bone Scan, and PET-CT
Fig. 23.1 ON in a 44-year-old male patient. (a) Anteroposterior view of the hip shows ON of the left femoral head. (b) Frog leg lateral view shows clear delineation of…
Traumatic Avascular Necrosis of the Femoral Head
Fig. 14.1 Vascular anatomy of the femoral head. (a) The deep branch of the medial circumflex femoral artery (MCFA) runs towards the intertrochanteric crest between the pectineus muscle medially and…
Transtrochanteric Curved Varus Osteotomy for the Treatment of Osteonecrosis of the Femoral Head
Fig. 47.1 Transtrochanteric curved varus osteotomy is performed between the greater and the lesser trochanters, which has a merit to prevent elevation of the greater trochanter, lateral displacement of the…
Pathophysiology of Ischemic Diseases of the Hip: Osteonecrosis, Borderline Necrosis, and Bone Marrow Edema Syndrome
Fig. 18.1 Hematopoietic cells are depleted, and the marrow space is filled with large round or ovoid fat cells. Lacunae are filled with viable osteocytes (Arlet and Durroux Type 1…
Kienböck’s Disease of the Lunate
Fig. 57.1 Coronal T1-weighted MRI in a 31-year-old woman with wrist pain. The patient has ulnar-negative variance and low signal is seen in the lunate. Plain radiograph showed no pathology…
Transtrochanteric Rotational Osteotomy for Femoral Head Osteonecrosis
Fig. 45.1 The calculation of the combined necrotic angle from magnetic resonance imaging scans. A The angle of necrotic area in the midcoronal image. B The angle of necrotic area…
Posterior Rotational Osteotomy for Severe Femoral Head Osteonecrosis
Fig. 46.1 Concept and advantage of high-degree posterior rotational osteotomy. The necrotic lesion is moved to the medial to posteromedial non-weight-bearing portion of the joint by high-degree posterior rotational osteotomy….
Legg-Calvé-Perthes Disease: Diagnosis, Imaging, and Classifications
Fig. 60.1 A 7-year-old male complaining of left groin pain and limping for 1 year. This patient was treated in another institution with physiotherapy but no restriction of activities. When…
Causes of Pain in Early and Advanced Stage Osteonecrosis
Fig. 21.1 MRI findings (fat suppression, fluid sensitive sequence) of bone marrow edema syndrome showing marked, bright, hyperintense signal in left femoral head and neck Fig. 21.2 MRI findings (T1…
The Pathology of Osteonecrosis of the Femoral Head
Fig. 19.1 Zone formation in ON. A wedge-shaped necrotic area is seen in a subchondral area, which is surrounded by the reparative tissue. This reparative tissue continues to the normal…
