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Unknown case #32 – Pelvis Radiograph

History: 70 year old male with hip pain.  What is your diagnosis in this 70 year old male with hip pain? Comment and share below. Advertisements

Solution to Unknown Case #31 – Osteopetrosis or Marble Bone Disease

History: male with headache. This is a case of osteopetrosis, also referred to as marble bone disease. In osteopetrosis, bones become abnormallly hardened, as opposed to osteoporosis where bone mineral density is abnormally decreased and osteomalacia where bones are abnormally soft. Osteopetrosis is thought to be caused by impaired osteoclast activity, resulting in impaired bone … Continue reading

Unknown case #31 – Skull radiograph

History: male with headache. What is your differential diagnosis? Comment and share below.

Solution to Unknown Case #30 – Perilunate Dislocation

History: 30 year old man with wrist swelling and pain. This is a case of a perilunate dislocation. A perilunate dislocation is a carpal instability pattern that usually results from hyperdorsiflexion of the wrist. In the perilunate dislocation pattern the capitate dislocates dorsally and moves proximally and rotates the lunate in a volar direction while … Continue reading

Chondrocalcinosis Mnemonic – WHIP A DOG

This mnemonic has been commonly used to recall the differential diagnosis of chondrocalcinosis, the most common cause of which is pseudogout (calcium pyrophosphate dihydrate deposition disease). W – Wilson disease H – hyperparathyroidism, hemophilia, hemochromatosis I – idiopathic P – pseudogout A – acromegaly D – diabetes O – ochronosis G – gout 

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

Unknown Case #30 – Wrist radiograph

History: 30 year old man with wrist swelling and pain. What is your diagnosis for this 30 year old man with left wrist pain and swelling? Comment and share below.

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!

Humerus Shaft Fracture – Holstein Lewis Fracture

History: Child with left arm pain.  This is a left humeral diaphysis or humerus shaft fracture. In fractures of the humerus shaft it is imperative to assess for radial nerve injury. The radial nerve courses along the spiral groove of the humerus and can be damaged with humeral shaft fractures. This humeral shaft fracture has … Continue reading

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