osteoblastoma is a rare benign, but locally aggressive bone tumor with rare malignant transformation. it mostly affects the vertebral column and long bones. radiographically, it is seen as an expansile, oval, sclerotic or lytic mass-like lesion with well-defined borders, although sometimes it may mimic a malignant tumor such as osteogenic sarcoma by its irregular borders. herein, we report a ca...

A seven year-old boy with several painless masses on the ribs and shoulder was referred to our hospital. The masses were so prominent that they prevented the child’s sleep. Since the patient had been ridiculed by his friends due to the rib prominences, he had refused to attend school. After clinical and radiological evaluations, the masses were diagnosed as hereditary multiple exostoses of the ...

It is conventionally considered that because of their fiber orientations, the external intercostal muscles elevate the ribs, whereas the internal interosseous intercostals lower the ribs. The mechanical action of the intercostal muscles, however, has never been studied directly, and the electromyographic observations supporting this conventional thinking must be interpreted with caution. In the...

Conventional wisdom maintains that the diaphragm lifts the lower ribs during isolated contraction. Recent studies in dogs have shown, however, that supramaximal, tetanic stimulation of the phrenic nerves displaces the lower ribs caudally and inward. In the present study, the hypothesis was tested that the action of the canine diaphragm on these ribs depends on the magnitude of muscle activation...

Hodgkin's lymphoma (HL) is typically a systemic disease with involvement of the cervical, supraclavicular and mediastinal lymph nodes. An extra-nodal presentation of HL is unusual and seldom encountered in the clinic. The most common sites of presentation for extra-nodal extension are the spleen, liver, lungs, bones and marrow. The bones that are frequently involved are the vertebrae, pelvis, r...

Paleoepidemiology (the study of disease and trauma in prehistoric populations) provides insight into the distribution of disease and can have implications for interpreting behavior in extinct organisms. A monospecific bonebed of the giant carcharodontosaurid Mapusaurus (minimum number of individuals = 9) from the Cañadón del Gato site, Neuquén Province, Argentina (Cenomanian) provides a rare op...

BACKGROUND AND PURPOSE Determining the source of a patient's pain in the upper thoracic region can be difficult. Costovertebral (CV) and costotransverse (CT) joint hypomobility and active trigger points (TrPs) are possible sources of upper thoracic pain. This case report describes the clinical decision-making process for a patient with posterior upper thoracic pain. CASE DESCRIPTION The patie...

a seven year-old boy with several painless masses on the ribs and shoulder was referred to our hospital. the masses were so prominent that they prevented the child’s sleep. since the patient had been ridiculed by his friends due to the rib prominences, he had refused to attend school. after clinical and radiological evaluations, the masses were diagnosed as hereditary multiple exostoses of the ...