ENCHONDROMA Figure 6-27 ENCHONDROMA A: A curettage specimen of an enchondroma shows an admixture of cartilage and bone. Some of the cartilaginous nodules are rimmed by a shell of reactive bone formation. The presence or absence of an infiltrative growth pattern can sometimes be difficult to inter... More about this image found in ENCHONDROMA A: A curettage specimen of an enchondroma shows an admixture o...

ENCHONDROMA Figure 6-27 ENCHONDROMA A: A curettage specimen of an enchondroma shows an admixture of cartilage and bone. Some of the cartilaginous nodules are rimmed by a shell of reactive bone formation. The presence or absence of an infiltrative growth pattern can sometimes be difficult to inter... More about this image found in ENCHONDROMA A: A curettage specimen of an enchondroma shows an admixture o...

ENCHONDROMA Figure 6-29 ENCHONDROMA Left: This enchondroma displays low cellularity, abundance of hyaline cartilaginous matrix, and areas of calcification which appear dark purple (bottom left). Right: At high power, the individual chondrocytes are seen in lacunar spaces. They have round, regula... More about this image found in ENCHONDROMA Left: This enchondroma displays low cellularity, abundance of ...

DIGITAL ENCHONDROMA Figure 6-30 DIGITAL ENCHONDROMA Left, right: This digital enchondroma has increased cellularity and atypia. Enchondromas arising in phalanges and in patients with enchondromatosis frequently show increased cellularity and atypia, and occasionally also myxoid changes, but are s... More about this image found in DIGITAL ENCHONDROMA Left, right: This digital enchondroma has increased ce...

CARTILAGINOUS TUMORS OF THE FINGER, MOST LIKELY ENCHONDROMA Figure 6-24 CARTILAGINOUS TUMORS OF THE FINGER, MOST LIKELY ENCHONDROMA A: A lytic lesion expands the middle phalanx with chondroid matrix. Cortical expansion and thinning are frequently present in enchondromas of the small bones of hand... More about this image found in CARTILAGINOUS TUMORS OF THE FINGER, MOST LIKELY ENCHONDROMA A: A lytic les...

CHONDROSARCOMA SECONDARY TO ENCHONDROMA Figure 7-13 CHONDROSARCOMA SECONDARY TO ENCHONDROMA Frontal radiograph (left) and coronal reformatted CT (right) of central chondrosarcoma secondary to enchondroma with pathologic fracture. More about this image found in CHONDROSARCOMA SECONDARY TO ENCHONDROMA Frontal radiograph (left) and coro...

ENCHONDROMA ASSOCIATED WITH PATHOLOGIC FRACTURE Figure 6-31 ENCHONDROMA ASSOCIATED WITH PATHOLOGIC FRACTURE A reactive fibroblastic pro liferation surrounds the enchondroma nodules secondary to the fracture. This should not be confused with dedifferentiation. More about this image found in ENCHONDROMA ASSOCIATED WITH PATHOLOGIC FRACTURE A reactive fibroblastic pr...

ENCHONDROMA ADJACENT TO THE ENDOSTEUM Figure 6-28 ENCHONDROMA ADJACENT TO THE ENDOSTEUM A trabecula of bone (center of image) extends into the enchondroma. A section through this trabecula perpendicular to the plane could mimic an infiltrative growth pattern, leading to the misdiagnosis of a low-... More about this image found in ENCHONDROMA ADJACENT TO THE ENDOSTEUM A trabecula of bone (center of image...

ENCHONDROMA Figure 6-22 ENCHONDROMA A: Lateral radiograph of the distal femur demonstrates a well-defined lucent lesion with characteristic matrix mineralization in the form of “popcorn” or “rings and arcs” calcifications. B: Coronal fat-suppressed T2-weighted image shows a characteristic T2 hyp... More about this image found in ENCHONDROMA A: Lateral radiograph of the distal femur demonstrates a well-...

CURETTAGE OF AN ENCHONDROMA Figure 6-25 CURETTAGE OF AN ENCHONDROMA A small window has been created in the cortical bone and a gray-glistening tumor is being curetted. More about this image found in CURETTAGE OF AN ENCHONDROMA A small window has been created in the cortica...

ENCHONDROMA IN THE DISTAL FEMUR Figure 6-26 ENCHONDROMA IN THE DISTAL FEMUR The patient was undergoing total knee replacement for osteoarthritis. The tumor is well circumscribed and composed of gray-glistening cartilaginous nodules. The tan-white areas represent foci of calcifications. More about this image found in ENCHONDROMA IN THE DISTAL FEMUR The patient was undergoing total knee repl...

SECONDARY CENTRAL CHONDROSARCOMA Figure 7-26 SECONDARY CENTRAL CHONDROSARCOMA Areas of a preexisting enchondroma can still be present (right of image), not only in central ACT/ CS1, but also in chondrosarcoma of higher histologic grade (left of image). More about this image found in SECONDARY CENTRAL CHONDROSARCOMA Areas of a preexisting enchondroma can st...

OLLIER DISEASE Figure 6-34 OLLIER DISEASE A–C: Multiple enchondromas and dysplastic appearance of the proximal humerus and lower extremities in a patient with Ollier disease. More about this image found in OLLIER DISEASE A–C: Multiple enchondromas and dysplastic appearance of the...

WHOLE BODY MRI Figure 3-4 WHOLE BODY MRI T1-weighted (A) and short T1 inversion recovery (STIR) (B) images in a patient with Ollier disease demonstrate multiple enchondromas of the upper and lower extremities and ribs (arrows). Axial diffusion-weighted MRI (C) demonstrates large enchondromas of t... More about this image found in WHOLE BODY MRI T1-weighted (A) and short T1 inversion recovery (STIR) (B) ...

ENCHONDROMATOSIS Figure 6-38 ENCHONDROMATOSIS A: There are numerous small well-circumscribed gray-glistening cartilaginous nodules in the medulla of the finger bone. B: Multiple gray-glistening intramedullary enchondromas, some of which have gradually grown large, expand the cortex and deform th... More about this image found in ENCHONDROMATOSIS A: There are numerous small well-circumscribed gray-glist...

ENCHONDROMATOSIS Figure 6-39 ENCHONDROMATOSIS A: Multiple individual nodules containing hyaline cartilage appear to be well circumscribed and are limited by reactive woven bone formation. An infiltrative (permeative) growth pattern, suggestive of a low-grade chondrosarcoma, is absent. B: The car... More about this image found in ENCHONDROMATOSIS A: Multiple individual nodules containing hyaline cartila...

OLLIER DISEASE Figure 6-36 OLLIER DISEASE The fingers are markedly deformed due to numerous enchondromas. (Courtesy of Dr. K. Raskin, Boston, MA) More about this image found in OLLIER DISEASE The fingers are markedly deformed due to numerous enchondro...

CHONDROSARCOMA IN A PATIENT WITH OLLIER DISEASE Figure 7-16 CHONDROSARCOMA IN A PATIENT WITH OLLIER DISEASE Frontal radiograph (left) and coronal fat-suppressed T2- weighted MRI (right) show the dys plastic appearance of the leg with multiple enchondromas. More about this image found in CHONDROSARCOMA IN A PATIENT WITH OLLIER DISEASE Frontal radiograph (left) ...

CENTRAL CARTILAGINOUS TUMOR OF THE HUMERUS Figure 7-2 CENTRAL CARTILAGINOUS TUMOR OF THE HUMERUS The lesion is heavily mineralized. Based on the size of the lesion, the thinning of the cortex, and the presence of periosteal reaction (arrows), a radiologic diagnosis of atypical cartilaginous tumor... More about this image found in CENTRAL CARTILAGINOUS TUMOR OF THE HUMERUS The lesion is heavily mineraliz...