N63: Unspecified lump in breast
N63.2: Unspecified lump in the left breast
N63.20: Unspecified lump in the left breast, unspecified quadrant
N63.21: Unspecified lump in the left breast, upper outer quadrant
N63.22: Unspecified lump in the left breast, upper inner quadrant
N63.23: Unspecified lump in the left breast, lower outer quadrant
N63.24: Unspecified lump in the left breast, lower inner quadrant
N63.25: Unspecified lump in the left breast, overlapping quadrants
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