Skin Pathology — Inflammatory and Neoplastic

A 38-year-old woman presents with a 6-month history of progressive skin lesions on her face, neck, and upper trunk. She reports itching and occasional bleeding from the lesions. On examination, she has multiple erythematous, scaly plaques with well-demarcated borders and a silvery scale. Some lesions show pinpoint bleeding when the scale is gently scraped. She denies systemic symptoms. Her family history is significant for similar skin disease in her mother. What is the most likely diagnosis?

Which of the following is the most common type of skin lymphoma and arises from cutaneous T cells?

A 52-year-old man presents with a 3-month history of a slowly enlarging, painless lesion on his left cheek. On examination, he has a pearly nodule with central ulceration and rolled, indurated borders. The lesion is approximately 1.5 cm in diameter. He reports a history of excessive sun exposure during his construction work. Dermoscopy reveals arborizing blood vessels. A punch biopsy is performed. What is the most likely histopathological finding?

Which of the following histological features is pathognomonic for lichen planus?