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Low-grade oncocytic tumour (LOT) demonstrates solid and compact nested growth pattern without a capsule (A). Tumour cells are eosinophilic with round to oval ‘low-grade’ nuclei and focal perinuclear halos (B). There are focal areas of loose stroma with pauci-cellular and irregular cell composition (C). CK7 is diffusely positive (D) and CD117 is typically negative (E). GATA3 is positive in LOT (F).
