The Bone Scan

The Bone Scan You have to know what is normal before you determine what is ABNORMAL!

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NORMAL "HOT" AREAS... ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

CAUSES OF SOFT TISSUE UPTAKE ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

MAKING A DIAGNOSIS... ,[object Object],[object Object],[object Object],[object Object],[object Object]

PITFALLS IN BONE SCANS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],INTERESTING FINDINGS

Myositis Ossificans ,[object Object],[object Object],[object Object],Myositis ossificans. A bone scintigram (A-B) demonstrates marked accumulation of radiotracer in the soft tissues of both distal thighs and knees left greater than right . A radiograph (C) of the left knee shows soft tissue ossification consistent with myositis ossificans. Myositis ossificans. A bone scintigram (A) demonstrates marked accumulation of radiotracer in the region of the right hip. Plain radiograph (B) of the right hipshows ossification in the soft tissues consistent with myositis ossificans.

Myocardial Findings in a Bone Scan ,[object Object],[object Object],[object Object],[object Object],Scintigraphy with Tc-99m pyrophosphate is commonly used to detect acute myocardial infarction. Similar findings are present with Tc-99m diphosphonates, when there is an excess of tissue calcium, following local tissue necrosis or damage. Focal uptake is seen with transmural myocardial infarction. Patchy uptake has been noted in unstable angina pectoris, and diffuse uptake has been observed with cardiomyopathies (ref) , pericardial tumors, and diffuse pericarditis. Persistent uptake following infarction correlates with a higher rate of complications and with left ventricular aneurysm. Other causes of myocardial uptake include myocardial contusion, electro-cardioversion, and amyloidosis (ref) Amyloidosis Anterior view of the whole-body bone scan show intense radiotracer uptake in the myocardium.

Electrical Burns ,[object Object],[object Object]

Lymph node uptake due to extravasation ,[object Object],* Note RIGHT axilla ---> Injection site (AKA extravasation) --->

Urine contamination ,[object Object]

Malignant Fibrohistiocytoma ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

More FYI's ,[object Object],[object Object],[object Object],[object Object],[object Object]

The Bone Scan

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The Bone Scan