Incidental hypoglobus: primary amyloidosis of the superior rectus

Teoh SCB, Liew GC, Yap WM
Correspondence: Dr Stephen C B Teoh, stephen_teoh@ttsh.com.sg

ABSTRACT
A 69-year-old man who presented with incidental hypoglobus was found to have an isolated superior rectus mass. Diagnosis of primary amyloidosis of superior rectus was made on incisional biopsy and negative systemic work-up. This is an unusual manifestation and site for amyloidosis and should be a differential of any extraocular muscle mass.

Keywords: extraocular mass, hypoglobus, orbit, primary amyloidosis, superior rectus muscle
Singapore Med J 2006; 47(1): 65-67