#Tc99mmdp

[teachingrounds]

Today's case is a 25 year-old man with leg pain and selling. Radiograph reveals a lucent tibial lesion with groundglass appearance, thinning of the adjacent cortical bone, and no periosteal reaction. These features favor a benign entity. Tc-99-MDP bone scan reveals intense uptake and no other lesions. Findings are most compatible with monostotic fibrous dysplasia. See the full case: https://radiopaedia.org/cases/fibrous-dysplasia-in-tibia

Case courtesy of Erik Ranschaert, Radiopaedia.org, rID: 14236

[nuclear-medicine-tlv]

Bone scan with Tc-99m-MDP. Fibrous Dysplasia in skull (Pirate sign). Increased uptake of Tc-99m MDP in a pattern reminding us of a "pirate wearing an eyepatch." #bonescan #tc99mmdp #piratesign #fibrousdysplasia

[teachingrounds]

Patients with FD can undergo MDP bone scan to assess for polyostotic involvement. Polyostotic FD typically involves "long lesions in long bones." Patients should be evaluated for endocrine abnormalities, particularly pediatric patients (we will cover this in more detail tomorrow).

Today's case is a 30 year-old woman with longstanding leg deformity and new leg pain. Radiograph reveals multiple lucent lesions with cortical thinning and no periosteal reaction. Findings are suggestive of FD. At bone scan, there is uptake in the left pelvis, femur and tibia, compatible with polyostotic FD.

Case courtesy of Frank Gaillard, Radiopaedia.org, rID: 32752