Biological membranes are used as implants in veterinary reconstructive surgery in order to restore the function and structure of damaged tissues. Various tissues from animals, kept by different techniques and implanted in recipients of the same or different species, help repair wounds where extensive tissue loss or the inability to scarring is evidenced. Although the benefits of biological membranes outweigh their disadvantages, their use in clinical and surgical routines is rare, largely due to ignorance of their characteristics, handling and implantation. The present article aims to review general aspects on biological membranes, from procurement to possible complications of their use, through experimental studies and previously reported cases, and to encourage their use as a biomaterial implant in case of anatomical defects, traumatic wounds, oncological postoperative care, and traumas in general.

Ocular tumors are frequent in the eye clinic of small animals. They can be primary or secondary, and its location within the eyeball or its attachments may trigger consequences ranging from the loss of aesthetics to affecting the eye’s functionality. This article presents a case of conjunctival angiokeratoma in a five-year-old female dog of Neapolitan Mastiff breed, in the Small Animal Clinic of <em>Universidad Cooperativa de Colombia</em> in Ibagué. The patient was treated for presenting ocular alteration in her left eye characterized by an increase of volume and hyperemia of the third eyelid conjunctiva, with a two-year evolution. During the ophthalmic examination, ocular mucosanguineous discharge, conjunctival hyperemia and follicular conjunctivitis were found. After general and ophthalmic clinical examination was performed, a biopsy of the lesion was performed for a histopathologic evaluation, which determined angiokeratoma in the third eyelid conjunctiva, a rare neoplasia in this type of tissue and in this breed. The treatment used in this case was surgical removal, with favorable results, which led to a complete removal of the tumor without sequelae in the patient.