This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
[{'content': 'Civatte bodies are a feature of ? \nSelect and explain. \nA. Lichen simplex chronicus, B. Lichen planus, C. Lichen sclerosus, D. All of the above', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Lichen planus Civatte bodies (cytoid bodies/ colloid bodies/ hyaline bodies)* A characteristic histopathological feature of lichen planus* They are apoptotic basal cells present at dermo-epidermal junction and papillary dermis. Formed my macrophages engulfing the melanin.Other histopathological features of lichen planus* Hydropic degeneration of basal cells (Pathognomic feature)* Hypergranulosis (thickening of the granular layer) (focal hypergranulosis clinically creates Wickham striae)* Hyperkeratosis (thickening of stratum corneum)* Acanthosis (thickening of stratum Malpighi)* Sub-epidermal lichenoid band (deposition of lymphocytes 8c histiocytes in the upper dermis)* Pigment incontinence (dropping of melanin from damaged Keratinocytes of epidermis into dermis)* Max Joseph space /cleft (separation of the epidermis in small clefts)* Sawtooth appearance (flattened rete ridges)", 'role': 'assistant'}]