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Diseases of the eyelids and conjunctiva
7
Chapter
7
Diseases of the eyelids and conjunctiva CHAPTER CONTENTS Congenital anomalies and early life diseases of the eyelids and conjunctiva Eyelid agenesis, hypoplasia, coloboma Distichiasis, ectopic cilia and trichiasis These conditions are common in purebred dogs, and are seldom encountered in other species Entropion and ectropion Symblepharon syndrome Conjunctival or corneal dermoid Inflammatory lesions of the eyelid skin Parasitic dermatitis in horses, cutaneous and ocular habronemiasis, ‘summer sores’ Demodicosis Dermatophytosis (‘Ringworm’) Canine cutaneous histiocytosis, sterile cutaneous granuloma Miscellaneous other causes of blepharitis Proliferative and neoplastic lesions of the eyelid skin Canine juvenile cutaneous histiocytoma Cutaneous and systemic histiocytosis Canine cutaneous melanocytic tumors (melanocytoma) Feline cutaneous melanocytic tumors Intradermal epithelial cysts Cutaneous sebaceous adenoma/epithelioma Canine trichoblastoma (basal cell tumor) Trichoepithelioma Canine infundibular keratinizing acanthoma (intracutaneous epithelioma, keratoacanthoma) Canine sweat gland adenoma Feline apocrine gland tumor Apocrine cystadenomas in Persian cats (hidrocystomas) Canine mast cell tumors
144 144 145 145 145 145 145 146 146 146 147 147 150 150 150 150 150 150 151 151 152 152 152 153 153 153 153
Feline mast cell tumors Epitheliotropic lymphoma (mycosis fungoides) of the eyelid skin Peripheral nerve sheath tumors (PNST) in cats Equine sarcoid and bovine fibropapilloma Eyelid margin masses Canine meibomian gland adenoma/epithelioma Canine meibomian gland adenocarcinoma Lid margin melanocytic tumors (melanocytoma) Lipogranuloma (chalazion) Squamous cell carcinoma of the lid margin in cats (multifocal squamous cell carcinoma) Squamous cell carcinoma of the lid margin in dogs Squamous cell carcinoma of the lid margin in horses and cattle Mesenchymal hamartomas of the lateral canthus Conjunctivitis General philosophy on the pathology of conjunctivitis Pseudopterygium in rabbits Ligneous conjunctivitis in dogs Episcleritis and canine nodular granulomatous episclerokeratitis (NGE, fibrous histiocytoma, nodular fasciitis) Feline herpesvirus keratoconjunctivitis, FHV-1 Eosinophilic keratoconjunctivitis Feline conjunctival papillary mastocytosis Lipogranulomatous conjunctivitis in cats Plasmacytic conjunctivitis (‘plasmoma’) of the nictitans in dogs Triamcinolone (depot corticosteroid preparation) injection site granulomas Canine conjunctival onchocerciasis Equine onchocerciasis Conjunctival neoplasms and other nodular lesions Conjunctival squamous cell carcinoma
154 157 157 158 160 160 162 162 162 162 164 164 164 166 166 167 167 169 173 173 174 174 174 175 175 175 176 176
Equine squamous cell carcinoma
176
Grade 1 mast cell tumor
153
Bovine squamous cell carcinoma
181
Grade 2 mast cell tumor
154
Canine squamous cell carcinoma
181
Grade 3 mast cell tumor
154
Feline squamous cell carcinoma
181
143
Chapter
7
Diseases of the eyelids and conjunctiva CHAPTER CONTENTS Congenital anomalies and early life diseases of the eyelids and conjunctiva Eyelid agenesis, hypoplasia, coloboma Distichiasis, ectopic cilia and trichiasis These conditions are common in purebred dogs, and are seldom encountered in other species Entropion and ectropion Symblepharon syndrome Conjunctival or corneal dermoid Inflammatory lesions of the eyelid skin Parasitic dermatitis in horses, cutaneous and ocular habronemiasis, ‘summer sores’ Demodicosis Dermatophytosis (‘Ringworm’) Canine cutaneous histiocytosis, sterile cutaneous granuloma Miscellaneous other causes of blepharitis Proliferative and neoplastic lesions of the eyelid skin Canine juvenile cutaneous histiocytoma Cutaneous and systemic histiocytosis Canine cutaneous melanocytic tumors (melanocytoma) Feline cutaneous melanocytic tumors Intradermal epithelial cysts Cutaneous sebaceous adenoma/epithelioma Canine trichoblastoma (basal cell tumor) Trichoepithelioma Canine infundibular keratinizing acanthoma (intracutaneous epithelioma, keratoacanthoma) Canine sweat gland adenoma Feline apocrine gland tumor Apocrine cystadenomas in Persian cats (hidrocystomas) Canine mast cell tumors
144 144 145 145 145 145 145 146 146 146 147 147 150 150 150 150 150 150 151 151 152 152 152 153 153 153 153
Feline mast cell tumors Epitheliotropic lymphoma (mycosis fungoides) of the eyelid skin Peripheral nerve sheath tumors (PNST) in cats Equine sarcoid and bovine fibropapilloma Eyelid margin masses Canine meibomian gland adenoma/epithelioma Canine meibomian gland adenocarcinoma Lid margin melanocytic tumors (melanocytoma) Lipogranuloma (chalazion) Squamous cell carcinoma of the lid margin in cats (multifocal squamous cell carcinoma) Squamous cell carcinoma of the lid margin in dogs Squamous cell carcinoma of the lid margin in horses and cattle Mesenchymal hamartomas of the lateral canthus Conjunctivitis General philosophy on the pathology of conjunctivitis Pseudopterygium in rabbits Ligneous conjunctivitis in dogs Episcleritis and canine nodular granulomatous episclerokeratitis (NGE, fibrous histiocytoma, nodular fasciitis) Feline herpesvirus keratoconjunctivitis, FHV-1 Eosinophilic keratoconjunctivitis Feline conjunctival papillary mastocytosis Lipogranulomatous conjunctivitis in cats Plasmacytic conjunctivitis (‘plasmoma’) of the nictitans in dogs Triamcinolone (depot corticosteroid preparation) injection site granulomas Canine conjunctival onchocerciasis Equine onchocerciasis Conjunctival neoplasms and other nodular lesions Conjunctival squamous cell carcinoma
154 157 157 158 160 160 162 162 162 162 164 164 164 166 166 167 167 169 173 173 174 174 174 175 175 175 176 176
Equine squamous cell carcinoma
176
Grade 1 mast cell tumor
153
Bovine squamous cell carcinoma
181
Grade 2 mast cell tumor
154
Canine squamous cell carcinoma
181
Grade 3 mast cell tumor
154
Feline squamous cell carcinoma
181
143