Steroid acne histology

Conditions of the human integumentary system constitute a broad spectrum of diseases, also known as dermatoses , as well as many nonpathologic states (like, in certain circumstances, melanonychia and racquet nails ). [15] [16] While only a small number of skin diseases account for most visits to the physician , thousands of skin conditions have been described. [14] Classification of these conditions often presents many nosological challenges, since underlying etiologies and pathogenetics are often not known. [17] [18] Therefore, most current textbooks present a classification based on location (for example, conditions of the mucous membrane ), morphology ( chronic blistering conditions ), etiology ( skin conditions resulting from physical factors ), and so on. [19] [20] Clinically, the diagnosis of any particular skin condition is made by gathering pertinent information regarding the presenting skin lesion (s), including the location (such as arms, head, legs), symptoms ( pruritus , pain), duration (acute or chronic), arrangement (solitary, generalized, annular, linear), morphology ( macules , papules , vesicles ), and color (red, blue, brown, black, white, yellow). [21] Diagnosis of many conditions often also requires a skin biopsy which yields histologic information [22] [23] that can be correlated with the clinical presentation and any laboratory data. [24] [25] [26]

In a two-year carcinogenicity study in mice, administration of gefitinib at a dose of 270 mg/m 2 /day (approximately twice the recommended daily dose of 250 mg on a mg/m 2 basis; dose reduced from 375 mg/m 2 /day from week 22) caused hepatocellular adenomas in females. In a two-year carcinogenicity study in rats, administration of gefitinib at 60 mg/m 2 /day (approximately times the recommended daily clinical dose on a mg/m 2 basis) caused hepatocellular adenomas and hemangiomas/hemagiosarcomas of the mesenteric lymph nodes in female rats. The clinical relevance of these findings is unknown.

Steroid acne histology

steroid acne histology

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