Spinal Calcifying Pseudoneoplasm of the Neuraxis: A Rare and Benign Entity - A Case Report and Literature Review

Calcifying pseudoneoplasm of the neuraxis (CAPNON) is an uncommon, benign fibro-osseous lesion that can occur anywhere within the central nervous system. First described in 1978 by Rhodes and Davis, CAPNON has approximately 80 reported cases involving the spinal cord. This paper aims to summarize the key histological, radiological, and clinical features of CAPNON, discuss its potential pathogenesis, and report our first case of spinal CAPNON treated at our institute.