IMED3004 Lecture Notes - Lecture 6: Palpation, Keratinocyte, Basal-Cell Carcinoma
1 Nov 2020
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Sebaceous cyst is incorrect: usually derived from hair follicles. Predilection for trunk/neck/face: usually 1-4cm in size. Trichilemmal cyst: usually on scalp, no punctum. Variable minimal melanocytic proliferation: most important ddx is lentigo maligna. Sharply demarcated, stuck on : waxy surface, multiple histological patterns, often mixed. Rare genetic predispositions (e. g. gorlin"s syndrome: numerous histological types. Actinic keratosis: dysplastic proliferation of keratinocytes, marker of solar damage and risk of skin cancer, low rate of progression to. Scc (e. g. 0. 075-0. 096% per lesion per year: occur on: Fair skin: middle aged/elderly, common substrate for. Lips: vulva and penis, other risk factors. Usually involutes: rapidly growing crateriform lesion overlap with some types of scc, generally managed as scc. Adnexal tumours: wide variety of tumours benign and malignant:
