The objective of the study was to determine the trends in ocular tumours that affect the horse in
Kenya and to relate the histological characteristics to the clinico-epidemiological parameters.
The study design used the retrospective and prospective suspected cases presented to the
Department for histological diagnosis and from which a neoplastic diagnosis of the eye or its
adnexa was recorded. The procedure involved retrieval of diagnostic reports from retrospective
cases and histopathological examination of both retrospective and prospective cases. Each
case was evaluated for the type and frequency of histological lesions and clinicoepidemiological
data. Parameters included analyses of age, sex, breed, geographical origin,
diagnosis, location of neoplasms, the pathology of the lesion, and the clinical features
presented. The histological features were compared between cases and cellular behaviour was
correlated with clinico-epidemiological parameters.
The results showed that the most common ocular tumour was squamous cell carcinoma of the
adnexa. Occasional diagnosis included melanoma, adenoma, fibroma and lymphoma of the
adnexa. In a few cases, non neoplastic growths such as lymphoid hyperplasia of third eyelid
were key differential diagnoses. True ocular tumours were rarely observed.