Uncommon Finding: Occipital Spur on Tc-99m PYP Scintigraphy in Cardiac Amyloidosis

Arça B., Işık E. G., İnal E., Şanlı Y.

The Journal of Diagnostic and Theranostic Imaging , cilt.1, sa.2, ss.36-38, 2025 (Hakemli Dergi)

Özet

An occipital spur is an abnormal bony protrusion, also known as exostosis, that generally develops at the external occipital protuberance (EOP), a noticeable ridge on the posterior aspect of the skull. EOP can present in three distinct forms: type I (smooth surface), type II (crest-like shape), and type III (spine-like appearance) (1,2). They are generally associated with spondylosis or osteoarthritis, particularly in individuals who have experienced chronic pressure in the cervical spine or surrounding areas, and may also develop because of repeated trauma or inflammation in the region (3,4). While typically asymptomatic, occipital spurs may occasionally cause discomfort or pain, particularly if they compress nearby soft tissues. This compression can sometimes result in occipital neuralgia, characterized by sudden, sharp pain at the back of the head or upper neck due to irritation or pressure on the occipital nerves (5).