Sickle-cell disease without crisis [D57.1], Reason for Study: ^Reason: 12 y/o with Hg SS, history of headaches History: headaches Brain MRINo evidence of acute ischemic or hemorrhagic lesion on the scan.No evidence of abnormal enhancement.There is non expansile intra osseous T1 high signal intensity, T2 mixed but mainly high signal intensity without evidence of enhancement at the left sphenoid bone just lateral aspect of the sphenoid sinus and extends toward left side pterygoid plate. Comparing with prior CT scan obtained in 2013, there is no evidence of interval change since prior scan. Constellation of this lesion indicate benign bony lesion and the differential diagnosis include arrested pneumatization of the sphenoid sinus and benign bony lesions such as bone infarctions and non ossifying fibroma. The ventricles, sulci and cisterns are symmetric and unremarkable. There is no mass, mass effect, edema, midline shift, intra or extra-axial fluid collection/hemorrhage, restricted diffusion/acute ischemia, or abnormal contrast enhancement. The midline structures and cranial-cervical junction are normal. The mastoid air cells are clear.Mucosal thickenings and retention cysts. Brain MRA3D time of flight MOTSA MRA brain images with maximum intensity projections of the anterior/posterior intracranial circulation demonstrate normal ICAs, MCAs and ACAs. Vertebrobasilar system appears to be normal. No evidence of intracranial arterial luminal stenosis. No intracranial arterial aneurysm.
1. No evidence of acute ischemic or hemorrhagic lesion.2. No abnormal enhancement. No mass.3. Normal brain MRA4. Left sphenoid benign bone lesion, likely indicate arrested pneumatization differential diagnosis include bone infarction and non ossifying fibroma. 