<prompt> Most common tumor of eyelid isBasal cell carcinomaKeratoacanthomaMelanomaSquamous cell carcinoma  <response>: Ans. a Basal cell carcinoma. Ref. Baily Love, 25thpg. 609BASAL CELL CARCINOMA BCC, rodent ulcer Basal cell carcinoma is the commonest form of skin cancer and typically affects individuals between the ages of 40 and 79 years; 50 percent are male.85 percent occur in the head and neck region. Are thought to originate from pluripoten epithelial cells of the epidermis and hair follicles. BCCs grow slowly, but locally invasive and penetrate deeper tissues -- hence the term rodent ulcer, Metastasis is rare. Typically these tumours have a nodular appearance with a pearly rolled edge which is apparent on stretching the skin and telangiectatic vessels. Clinically types in order of frequency:- Nodular: 50-54; 90 nodularnodular cystic. Superficial : 9-11;- Cystic: 4-8; Pigmented: 6; Morpheic : 2. Treatment:- Surgical excision -- the treatment of choice with cure rates between 85 and 95.- Electrodessication and curettage -- commonly used for small superficial lesions 2--5 mm in diameter gives cure rates between 85 and 100.- Radiotherapy -- BCC is very radiosensitive and has an overall response of 92 in selected patients. This is reserved for elderly patients who are not suitable for surgery or for specialised anatomical sites.- Mohs micrographic surgery chemosurgery --involving serial horizontal excision and mapping of the tumour. Usually reserved for recurrent lesions, tumours in difficult areas or those with indistinct borders morphea-form.- Following complete excision it is unnecessary routinely to follow-up these patients unless they have a familial disposition for BCC formation Gorlins syndrome. 