Disorders of the Eyelid MCQs

Ans, b. Basal cell carcinoma Basal cell carcinoma is the most common malignant tumour of the eyelids and constitutes 85-90% of all malignant epithelialeyelid tumours.

The most common malignancy of the eyelid is basal cell carcinoma. Reference: Robin's basic pathology 10 th edition, 1308

Distichiasis is a rare condition in which there is an extra posterior row of cilia , occasionally in all four lids. The posterior row of cilia arise from the orifices of the Meibomian glands . Reference: Kanski 8/e, Pg. 32.

The surgical technique used for congenital ptosis depends primarily on levator function; patients with poor levator function often require some form of frontalis sling. The severity (in mm) of ptosis is secondary. Patients with marked ptosis and good levator function can still benefit from levator surgery. Reference: Kanski 8th edition/41-44

Sebaceous cell carcinoma commonly presents as a unilateral blepharoconjunctivitis. The other entities would be much less likely to involve the conjunctival surface of the eyelid to a significant degree and usually present differently. Reference: Kanski 8th edition/19

Ectropion combined with alteration of eyelid anatomy, or loss of eyelashes, should suggest the possibility of malignancy and need for a biopsy. Loss of eyelashes is not typical of involutional changes, facial palsy, or eyelid rubbing. Reference: Kanski 8th edition 13/45

Breslow thickness is the most important predictor of recurrence and survival in patients with eyelid skin melanoma. Reference: Kanski 8th edition/19

Muller recession -Weakening procedure Muller resection -Strengthening procedure In ptosis, Muller's resection needs to be done. Muller's muscle is an eyelid elevator which is weakened in ptosis. Reference: Kanski 8/e, Pg. 42 -44.