Intraosseous Pneumatocyst of the Iliac Bone

Monu, Johnny U.V.; Crotty, James M.; Pope, Thomas L.

doi:10.1097/00003086-199609000-00024

Cited by 6 publications

(5 citation statements)

References 6 publications

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“…4 The increased incidence in the ilium may be explained by the comparably thicker cartilage of the sacrum. 7 The characteristic radiographic features of a pneumatocyst, as described by Monu et al, 8 include: "localized collection of gas in the iliac bone, usually adjacent to the sacroiliac joint; thin sclerotic rim; no bony destruction; no soft tissue mass; and no other medullary abnormalities." The findings on MRI are nonspecific, and CT scan is the study of choice for definitive diagnosis, with Hounsfield units of -580 to -950 showing a gas-containing lesion.…”

Section: Discussionmentioning

confidence: 99%

“…The findings on MRI are nonspecific, and CT scan is the study of choice for definitive diagnosis, with Hounsfield units of -580 to -950 showing a gas-containing lesion. 4,9 Pneumatocyst has several putative etiologies, including subchondral extension of intra-articular gas as a result of cortical erosion from trauma, congenital, or degenerative changes 4,8,9 and involution of intraosseous ganglions or mucoid cysts. 4,8,10 The differential diagnosis includes intraosseous lipomas, solitary bone cysts, osteonecrosis, osteomyelitis, neoplastic collapse, and posttraumatic and postoperative changes.…”

Section: Discussionmentioning

confidence: 99%

“…4,9 Pneumatocyst has several putative etiologies, including subchondral extension of intra-articular gas as a result of cortical erosion from trauma, congenital, or degenerative changes 4,8,9 and involution of intraosseous ganglions or mucoid cysts. 4,8,10 The differential diagnosis includes intraosseous lipomas, solitary bone cysts, osteonecrosis, osteomyelitis, neoplastic collapse, and posttraumatic and postoperative changes. 2,8,9,11 The natural history of pneumatocysts is uncertain, with reports showing interval growth, involution, and stability of cyst size over time.…”

Section: Discussionmentioning

confidence: 99%

“…4,8,10 The differential diagnosis includes intraosseous lipomas, solitary bone cysts, osteonecrosis, osteomyelitis, neoplastic collapse, and posttraumatic and postoperative changes. 2,8,9,11 The natural history of pneumatocysts is uncertain, with reports showing interval growth, involution, and stability of cyst size over time. 12,13 The unusual symptoms described by the authors' patient, similar to those in previous reports, likely stem from his occupation as a diver who experienced significant pressure cycling on a regular basis.…”

Section: Discussionmentioning

confidence: 99%

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Treatment of Symptomatic Intraosseous Pneumatocyst Using Intraoperative Navigation

Formby¹,

Kang²,

Potter³

et al. 2015

Orthopedics

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Intraosseous pneumatocysts are benign air-containing lesions that are most often found in the spine and pelvis and are nearly always treated nonoperatively. Although rarely clinically symptomatic, studies have shown pneumatocysts to be present in up to 10% of computed tomography (CT) scans of the pelvis and spine. Radiographic characteristics of these lesions include a localized collection of gas with a thin sclerotic rim, no bony destruction, no soft tissue masses, and no medullary abnormalities. Computed tomography is the diagnostic study of choice, with Hounsfield units ranging from -580 to -950, showing a gas-containing lesion. Few studies have described the management of symptomatic pneumatocysts, and all reported cases concern underwater divers, presumably because of greater pressure cycling and barotrauma encountered while underwater diving. The goal of this report is to describe the intraoperative CT-guided navigation and percutaneous injection of calcium sulfate-calcium phosphate composite bone graft substitute material for the treatment of a symptomatic pneumatocyst in the ilium of a Navy dive instructor. The patient reported a 1-year history of increasing buttock pain with increased depth of diving, consistently reproduced by diving past a depth of 20 to 30 feet. To the authors' knowledge, this is the first description in the English literature of the operative treatment of an intraosseous pneumatocyst of the ilium. The use of intraoperative CT guidance permitted accurate percutaneous localization, decompression, and filling of the lesion with synthetic bone graft substitute, with complete early relief of symptoms. At 6-month follow up, the patient had reached diving depths of 170 feet without pain.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Treatment of Symptomatic Intraosseous Pneumatocyst Using Intraoperative Navigation

Formby¹,

Kang²,

Potter³

et al. 2015

Orthopedics

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“…Simple bone pneumatization cysts of the pelvic bones are a common, but poorly understood, innocuous findings on CT ( Figure 3D ). There have been occasional reports in the literature ( 55 – 57 ) and imaging features include well-circumscribed air-filled round defects of bone with a thin sclerotic rim, usually found adjacent to the SIJ on the iliac bone. They may be an unusual cause of pain that is indistinguishable from other causes of low back pain.…”

Section: Normal Variants and Pitfallsmentioning

confidence: 99%

Axial Spondyloarthritis: Mimics and Pitfalls of Imaging Assessment

2021

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Axial spondyloarthritis (axSpA) is a chronic inflammatory disorder that predominantly involves the axial skeleton. Imaging findings of axSpA can be divided into active changes, which include bone marrow edema, synovitis, enthesitis, capsulitis, and intra-articular effusion, and structural changes, which include erosions, sclerosis, bone fatty infiltration, fat deposition in an erosion cavity, and bone bridging or ankylosis. The ability to distinguish between imaging lesions suggestive of axSpA and artifacts or lesions suggestive of other disorders is critical for the accurate diagnosis of axSpA. Diagnosis may be challenging, particularly in early-stage disease and magnetic resonance imaging (MRI) plays a key role in the detection of subtle or inflammatory changes. MRI also allows the detection of structural changes in the subchondral bone marrow that are not visible on conventional radiography and is of prognostic and monitoring value. However, bone structural changes are more accurately depicted using computed tomography. Conventional radiography, on the other hand, has limitations, but it is easily accessible and may provide insight on gross changes as well as rule out other pathological features of the axial skeleton. This review outlines the imaging evaluation of axSpA with a focus on imaging mimics and potential pitfalls when assessing the axial skeleton.

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Air in bone: intraosseous pneumatocyst in a child

Kota

Coleman

2006

Pediatr Radiol

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Intraosseous Pneumatocyst of the Iliac Bone

Cited by 6 publications

References 6 publications

Treatment of Symptomatic Intraosseous Pneumatocyst Using Intraoperative Navigation

Treatment of Symptomatic Intraosseous Pneumatocyst Using Intraoperative Navigation

Axial Spondyloarthritis: Mimics and Pitfalls of Imaging Assessment

Air in bone: intraosseous pneumatocyst in a child

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