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Partial Atrophy : PIN-4 Triple Stain

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The image shows immunostaining with PIN-4 (HMWCK, p63, and racemase cocktail). Partial atrophy retains a fragmented basal cell layer in at least some of the glands. Many glands appear to be completely devoid of basal cells; however, they are morphologically similar to their neighbors with fragmented basal cell layer. Partial atrophy frequently expresses racemase as seen here. Same case as the previous image.

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