Abstract

Orbital myositis (OM) is relatively rare, but 2nd most common cause of extraocular muscle (EOM) disease after thyroid-associated orbitopathy (TAO). Typical OM presents as idiopathic, acute onset, painful diplopia in young adult females, responding to oral corticosteroids. However, many atypical cases are also seen.
Here, we describe case of a 22-year-old male patient who presented with non tender soft swelling on right lower lid,with CT suggestive of rhabdomyosarcoma, but FNAC showing no evidence of malignancy,presenting with a diagnostic dilemma. On the grounds of strong clinical suspicion, it was later diagnosed as an atypical presentation of OM, responding well to oral corticosteroids.