Thoracic psammomatous spinal meningioma with osseous metaplasia: A very rare case report

Abstract

Thoracic spinal psammomatous meningioma is a rare subtype of meningioma. Among diverse types of mesenchymal differentiation, osseous metaplasia is found to be still rarer. We are presenting a new case of thoracic psammomatous spinal meningioma with osseous metaplasia in a middle aged female which that gives a sense of cancellous bone in the spinal canal. To conclude, meningiomas with osseous metaplasia are very rare tumors that complicate the surgical removal in certain cases. Ossification, if predicted prior to operation with computed tomography reconstruction, makes planning of removal easier. In our case, maintained cerebrospinal fluid spaces despite hard consistency of tumor made its removal easier once cerebrospinal fluid was drained. We have submitted this article because it is very rare and curable pathology and preoperative diagnosis helps in prevention of neurological injury during its excision.

Keywords: Ossified meningioma; osseous metaplasia; psammomatous meningioma.

Figure 1

MRI transverse section showing meningioma at D7 compressing cord anterolaterally

Figure 2

Saggital section MRI dorsolumbar spine showing meningioma at D7 compressing cord anteriorly

Figure 3

Intraoperative picture showing dural exposure with center hard gritty part of meningioma

Figure 4

Intraoperative picture after excision of meningioma and dural repair

Figure 5

Tissue diagnosis showing ossification with psammoma bodies and osseous metaplasia at magnification ×100

Figure 6

Tissue diagnosis showing ossification with psammoma bodies at magnification ×40