Numerous systemic diseases can cause scleritis or episcleritis. Freque
ntly, symptoms and complications compromising vision can only be manag
ed with systemic immunosuppressants. There are no clear guidelines on
the indications for systemic immunosuppressants in patients with episc
leritis and scleritis. Patients and methods. The aim of the present re
trospective study was to investigate how many patients with episclerit
is or scleritis have an associated systemic disease and at what stage
it is diagnosed. Secondly, the proportion of patients who present with
episcleritis or scleritis in the first instance and then change into
the other category during the course of the disease was analyzed. Fina
lly, we checked wh ether the presence of an associated systemic diseas
e indicates the necessity to treat the patient with nonsteroidal syste
mic immunosuppressive drugs. Results. Sixty-eight patients with inflam
matory scleral diseases were treated at the University Eye Clinic betw
een 1991 and 1995. In 13 patients an associated systemic disease was d
iagnosed before the appearance of ocular symptoms, and in 8 patients s
uch an illness was diagnosed at a later stage. In 2 cases (3%) the ocu
lar disease category changed during the course of the disease. Neither
in the episcleritis nor in the scleritis population was a statistical
ly significant correlation established between the diagnosis of an ass
ociated systemic disease and the necessity to treat the patient with n
onsteroidal systemic immunosuppressive drugs. Conclusion. The small nu
mber of patients who changed the ocular disease category may indicate
that episcleritis and scleritis are two independent entities, which mi
ght even be caused by different mechanisms. The indications for the ma
nagement of episcleritis and scleritis with immunosuppressive drugs sh
ould not only depend on the diagnosis of an associated systemic diseas
e, but also and mainly on the severity of the ocular manifestation.