Category Dermatology

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Introduction Variably sized papules or nodules. Cysts can be divided into true cysts with an epithelial lining (histologically and sometimes visible clinically) and false cysts without such a lining. Appreciation of the actual size of the cyst often requires palpation.…

The entities in this chapter can be further classified according to the algorithm in Fig. 89.1 . Open full size image Fig. 89.1 Simplified classification of benign epidermal proliferations. Although the term solitary lichenoid keratosis is sometimes used, patients may…

Introduction Keratinocyte carcinoma (KC), also referred to as non-melanoma skin cancer (NMSC), is the most frequently observed malignancy in Caucasians. KC typically refers to basal cell carcinoma (BCC) and squamous cell carcinoma (SCC). In individuals with fair skin, ∼75–80% of…

This chapter covers a range of vascular disorders from livedo reticularis to common vascular ectasias such as venous lakes and telangiectasias. Additional disorders characterized by a proliferation of blood vessels are covered in Chapters 85 (infantile hemangiomas and vascular malformations)…

An ulcer is defined as a wound with loss of the entire epidermis plus dermal tissue, sometimes extending as deep as the subcutis. The most common types of leg ulcers – venous, arterial, and neuropathic – as well as pressure…

Vascular anomalies, which often present at birth or during early infancy, are classified into two groups based on their biologic and clinical behavior: – Vascular tumors , most commonly the infantile hemangioma (IH), that are characterized by endothelial cell proliferation…

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This chapter focuses primarily on entities in which there is a reduction in collagen and/or elastic tissue within the dermis. They vary from very common skin disorders such as striae to cutaneous manifestations of rare genetic syndromes. Loss of subcutaneous…