Answers
1)Four abnormalities
-Ulcerated left mastectomy site
-Peur de orange of the right breast
-Skin puckering of the right breast
-Inverted right nipple
-Hyperpigmented skin of the right breast
2)Metastasize right breast carcinoma
3)Two regions to look as well
-Right axillary region
-Auscultation of the chest
4)Investigation
-CT scan of the thorax
-Tissue biopsy of the right breast