1. Sebaceous carcinoma: 

a. is commoner in the upper lid than the lower lid 

b. is usually bilateral 

c. has a yellowish appearance 

d. of the conjunctiva only occurs as a result of pagetoid 
    spread from the eyelid 

e. metastasis usually haematogenous 

Answera.T   b.F   c.T   d.F   e.FSebaceous carcinoma can arise from either the meibomian gland or the gland of Zeis. Sebaceous glands are found onthe caruncle and therefore primary sebaceous carcinoma can arise from the conjunctiva.The yellowish appearance of the tumour is due to the presence of lipid.Spread is usually to the regional lymph node.

2. The following are features of Muir-Torre's syndrome: 

a. multiple basal cell carcinoma 

b. multiple keratoacanthoma 

c. multiple sebaceous carcinoma 

d. meningioma 

e. adenocarcinoma of the proximal bowel 

Answera. F   b.T   c.T   d.F   e.TMuir-Torre's syndrome is a familial condition characterized by the presence of multiple skin lesion associated withinternal malignancy. The skin lesion usually takes the form of multiple keratoacanthoma or sebaceous carcinoma / adenoma. The most common internal malignancy is adenocarcinoma of the proximal bowel especially the ascending colon.

3. Medulloepithelioma: 

a. arises from the non-pigmeneted retinal pigment epithelium 

b. most commonly found on the posterior surface of the iris 

c. is a benign tumour 

d. causes neovascular glaucoma 

e. may contain striated muscle histologically 

Answera.T   b.F   c.F   d.T   e.TIt is derived from the neuroectoderm and frequently affects the non-pigmented retinal pigment epithelium of the ciliary body.The average of presentation is 5 years of ageHistologically, tissues such as cartilage or striated musclemay be found. The cell type may be benign or malignant.Neovascular glaucoma is a common complication. In the presence of normal fundus, patients with neovascular glaucoma should be examined for medulloepithelioma.

4. In sympathetic ophthalmia: 

a. there are bilateral granulomatous panuveitis 

b. the choriocapillaris are occluded by macrophages 

c. Dalen-Fuch's nodules are found on the inner surface of the 
    Bruch's membrane 

d. Dalen-Fuch's nodules are pathognomonic of this condition 

e. removal of the damaged eye reduces the inflammation 

Answera.T   b.F   c.T   d.F   e.FThe choriocapillaris are typically spared in sympathetic ophthalmia.Dalen-Fuch's nodules also occur in other conditions such as Vogt-Koyanagi-Harada'ssyndrome.Once the condition, removal of the damaged(inciting) eye does not affect the clinical picture. 
a

5. Rhabdomyosarcoma of the orbit: 

a. typically affects patients in the second decade of life 

b. causes systemic fever 

c. has better prognosis than extraorbital type 

d. of the alveolar type is the most common 

e. is resistant to radiotherapy 

Answera.F   b.F   c.T   d.F   e.FIt affects children in the first decade of  life withan average age of presentation at 7.Systemic fever is uncommon and this helps todifferentiate it from orbital cellulitis.The embryonal type is the most common.It is sensitive to radiotherapy.