Giant Cell Tumor

Margin Irregular Bone
Fig. 8.8a The margins of this bone lesion (arrows) are very irregular and ill defined. The cortex has clearly been destroyed. This is a typical giant cell tumor. b On MRI the same lesion shows a fluid-fluid interface. You can also appreciate a focal defect of the cortex.

I Fibrous Dysplasia

Giant Cell Tumor Humerus Mri Humerus

Fig. 8.9a Fibrous dysplasia is characterized by an expansion of the affected bone and a ground-glass-like internal structure of the bone. In this case it is located in the diaphysis and the distal metaphysis of the humerus. It occurs with greater frequency at the skull base and in the facial bones. b On the right side, the bone of the skull base is expanded, the normal cancellous bone structure replaced. The right oval foramen (nicely indicated by

Fig. 8.9a Fibrous dysplasia is characterized by an expansion of the affected bone and a ground-glass-like internal structure of the bone. In this case it is located in the diaphysis and the distal metaphysis of the humerus. It occurs with greater frequency at the skull base and in the facial bones. b On the right side, the bone of the skull base is expanded, the normal cancellous bone structure replaced. The right oval foramen (nicely indicated by a Simple bone cyst a Simple bone cyst

Right Humerus Bone Cyst

Fig. 8.10a This radiograph (left) displays a large bone cyst surrounded by a fine sclerotic margin. In its inferior portion a very close look reveals a small piece of bone suspended in the cyst, the "fallen fragment." A T2-weighted MR examination (right) documents an interface between blood and serous fluid. The bone fragments cross the horizontal interface. Blood and

Fig. 8.10a This radiograph (left) displays a large bone cyst surrounded by a fine sclerotic margin. In its inferior portion a very close look reveals a small piece of bone suspended in the cyst, the "fallen fragment." A T2-weighted MR examination (right) documents an interface between blood and serous fluid. The bone fragments cross the horizontal interface. Blood and

Fibrous Dysplasia Crainial

the smaller foramen spinosum directly posterolateral to it) is clearly smaller than the left: in fibrous dysplasia the cranial nerves passing through the skull foramina may eventually be compressed. c Shown is the drastic alteration of the skull in fibrous dysplasia. The famous "Elephant Man" who lived in London in the late 19th century could very well have been a case of fibrous dysplasia. Discussion continues, though.

b Aneurysmal bone cyst bone fragment are due to the fracture, which rendered this simple bone cyst symptomatic. b This aneurysmal bone cyst has expanded the tibia and destroyed the cortex, and also contains a fluid-fluid interface. This is a typical finding, which nonetheless requires histological confirmation.

I Bone Cyst b Aneurysmal bone cyst

Aneurysmal Bone Cyst Radiology

Stress Fracture

I Bone Infarction

Stress Fracture

Simple Fracture Man

Fig. 8.11 This patient has trained for the New York marathon for four months. The pain in his foot began at the beginning of the training, which is why he blamed it on a new set of running shoes he got for the occasion. The fracture line in the metacarpal bones is frequently barely visible, quite unlike the hypertrophic formation of callus that is regularly seen.

Fig. 8.11 This patient has trained for the New York marathon for four months. The pain in his foot began at the beginning of the training, which is why he blamed it on a new set of running shoes he got for the occasion. The fracture line in the metacarpal bones is frequently barely visible, quite unlike the hypertrophic formation of callus that is regularly seen.

Stress fracture: Stress fractures of the metatarsal bones ("insufficiency fracture," "march fracture," Fig. 8.11) or in the long tubular bones such as the tibia and the femur develop in the context of chronic excess physical strain. Reactive periosteal and endosteal bone formation occurs together with repetitive microfractures that can become visible as fine fracture lines. The bone scan shows a very high bone turnover.

Bone infarct: A bone infarction may lead to popcorn or snakelike (serpiginous) calcifications in the cancellous bone (Fig. 8.12). It occurs with greater frequency in steroid therapy, alcoholism, and diver's disease (decompression sickness). In the large bones it can resemble a cartilaginous tumor.

• Diagnosis: Paul decides that this is a nonossifying fibroma that needs no further work-up. He is right. It is a so-called "don't touch me" lesion. Boris may return to the center court.

Primum nihil nocere (First, do no harm)! If a definitely benign lesion is not recognized as such and further superfluous studies are performed, the patient suffers—psycho-logically and potentially even physically.

Beat The Battle With The Bottle

Beat The Battle With The Bottle

Alcoholism is something that can't be formed in easy terms. Alcoholism as a whole refers to the circumstance whereby there's an obsession in man to keep ingesting beverages with alcohol content which is injurious to health. The circumstance of alcoholism doesn't let the person addicted have any command over ingestion despite being cognizant of the damaging consequences ensuing from it.

Get My Free Ebook


Post a comment