This tag is associated with 9 posts

Neonatal Onset Multisystem Inflammatory Disorder

History: Not moving left leg, flexion contracture at the knee. Other past medical history includes hyperbilirubinemia at birth, autoimmune hepatitis, sensorineural hearing loss and global developmental delay. Neonatal Onset Multisystem Inflammatory Disease (NOMID) was first described by Prier and Griscelli in 1987 and has also been referred to as chronic infantile neurologic, cutaneous and articular syndrome (CINCA). It is a rare genetic disorder on the spectrum of cryopyrin associated periodic syndromes (CAPS). NOMID is … Continue reading


History: middle aged male with knee pain.  This is a case of lipohemarthrosis beautifully demonstrated on MRI. Lipohemarthrosis is simply the presence of fat and blood in a joint effusion (see a large knee joint effusion here), and it typically is caused by a fracture at the articular surface of a joint that extends into … Continue reading

Pediatric Knee Anatomy

The following images are from WikiRadiography (WetPaint) here .

Unknown Case #34 – Knee pain

History: 50 year old man with knee pain.  What is your diagnosis? Comment and share below!

Knee Joint Effusion on Lateral Radiograph

History: 50 year old male with knee pain and swelling.  This is the appearance of a knee joint effusion on lateral radiographs. Knee joint effusions (sometimes referred to as “water on the knee”) is fluid filling the joint space of the knee. Effusions can be caused by any of the following entities: 1. Arthritis (osteoarthritis … Continue reading

Solution to Unknown Case #29 – Enchondroma on MRI

History: 35 year old male with knee pain.  This is the appearance of an enchondroma on MRI. Enchondromas are benign lesions made up of hyaline cartilage that arise within medullary bone. They typically occur in the metaphysis or metadiaphyseal junction of the proximal humerus, proximal and distal femur, and proximal tibia, as in our case … Continue reading

Unknown case #29 – Knee MRI

History: 35 year old male with knee pain. What is your diagnosis in this 35 year old male with knee pain? Comment and share below!

Tibial Tubercle Avulsion Fracture

History: 16 year old female with knee pain.  This is the appearance of an avulsion fracture of the tibial tubercle, which occurs when the patellar tendon pulls a piece of bone off of the tibia. This is an acute injury where the apophyseal ossification center becomes displaced, as opposed to chronic repetitive stress injuries at … Continue reading

Synovial Osteochondromatosis – Differential Diagnosis

History: 50 year old male with knee pain. This is a case of synovial osteochondromatosis, which can be either primary or secondary. Primary synovial osteochondromatosis (or chondromatosis alone, if the bodies are not all ossified) is a benign idiopathic neoplasm of the synovium characterized by multiple loose intra-articular cartilaginous bodies, some of which may be … Continue reading