KIT localization patterns II and III prognosis: which statement is true?

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Study for the ACVIM Small Animal Internal Medicine Exam to enhance your veterinary knowledge. Prepare with flashcards and multiple-choice questions, featuring hints and explanations. Ensure success in your exam journey!

Multiple Choice

KIT localization patterns II and III prognosis: which statement is true?

Explanation:
KIT localization patterns II and III indicate abnormal KIT distribution in mast cell tumors and carry prognostic significance. Pattern II, with focal cytoplasmic KIT staining, and Pattern III, with diffuse cytoplasmic staining, are both associated with more aggressive tumor behavior compared with the normal membranous pattern. Pattern III shows the strongest association with adverse features, but Pattern II also correlates with poorer outcomes relative to pattern I. Therefore, both Pattern II and Pattern III are negative prognostic markers, with Pattern III worse than Pattern II.

KIT localization patterns II and III indicate abnormal KIT distribution in mast cell tumors and carry prognostic significance. Pattern II, with focal cytoplasmic KIT staining, and Pattern III, with diffuse cytoplasmic staining, are both associated with more aggressive tumor behavior compared with the normal membranous pattern. Pattern III shows the strongest association with adverse features, but Pattern II also correlates with poorer outcomes relative to pattern I. Therefore, both Pattern II and Pattern III are negative prognostic markers, with Pattern III worse than Pattern II.

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