Tumoral calcium pyrophosphate dihydrate deposition disease with bone destruction in the shoulder

Abstract

We report on specific CT and MR features in two cases of tumoral calcium pyrophosphate dihydrate deposition disease in the shoulder with unusually large tumors. CT revealed features that were specific to the disease. MR was useful for detecting the extent of the mass and for obtaining information on adjacent soft-tissue and bone-marrow changes.

Pseudotumoural soft tissue lesions of the foot and ankle: a pictorial review

“…On MR imaging, signal intensities of pseudogouty tophi can vary from low to intermediate on T1-WI and from low to high on T2-WI. Often areas of low signal are seen, corresponding to calcifications [57]. …”

An Unusual Pathologic Ulna Fracture Induced by Intraosseous Tumoral Calcium Pyrophosphate Dihydrate Crystal Deposition Disease

“…On radiographs, TCPPDCD presents as periarticular, radio-opaque, amorphous, granular calcifications with pressure erosion of adjacent bones. 7 , 16 Radiolucent septae, which were identified on our patient’s imaging, can also be seen and may be specific to TCPPDCD. 7 On magnetic resonance images, TCPPDCD characteristically displays low-intensity or hypointense signals on T1 sequences and medium to high signal intensity on T2-weighted images.…”

“… 5 A lesser-known, rare variant, TCPPDCD, is a unique entity characterized by the formation of a periarticular mass leading to the local erosion of adjacent bones. 6 , 7 With limited cases of TCPPDCD reported, we describe an interesting case of TCPPDCD, differentiated by its unusual, intraosseous, long-bone origin, resulting in a pathologic fracture. 8 …”

“… 7 On magnetic resonance images, TCPPDCD characteristically displays low-intensity or hypointense signals on T1 sequences and medium to high signal intensity on T2-weighted images. 7 , 8 , 10 These findings were also consistent with the magnetic resonance imaging findings seen in our patient.…”

Calcium Pyrophosphate Dihydrate Crystal Deposition Disease of the Temporomandibular Joint

“…These features are considered specific for CPPD crystal deposition disease. 35 Initially, there is no invasion into the joint space. With disease progression, involvement of the joint space with degenerative changes of the surrounding bones, including articular space narrowing, osteophytosis and subchondral cyst formation, can also be seen.…”