๐ ็ธฝ็ฎ้ ๏ฝ ๐ ่ฑๆๅๆ๏ผๆฌ็ฏ๏ผ ๏ฝ ๐ ๅฎๆด็ฟป่ญฏ ๏ฝ โญ ็ฒพ่ฏ็ญ่จ
PATHOLOGY
Histopathologic changes in erythematous and telangiectatic rosacea may be subtle and are often limited to vascular ectasia and mild edema (Fig. 37.11A). In the inflammatory papules and pustules, a more prominent perivascular and perifollicular lymphohistiocytic infiltrate appears (Fig. 37.11B). Sebaceous hyperplasia may be prominent in some patients. Comedo formation is notably lacking. In the granulomatous form of rosacea, non-caseating epithelioid granulomas are seen within the dermis (Fig. 37.11C). Phymatous rosacea shows dilated hair follicles, marked hyperplasia of sebaceous glands, and a variably dense lymphohistiocytic inflammatory infiltrate.