Definition. 1  A lumpectomy is a type of surgery used to treat breast cancer. It is considered breast-conserving surgery because in a lumpectomy, only the malignant tumor and a surrounding margin of normal breast tissue are removed. 2  Lumpectomy is a surgical treatment for newly diagnosed breast cancer. It is estimated that at least 50% of women with breast cancer are good candidates for this procedure. The location, size, and type of tumor are of primary importance when considering breast cancer surgery options.
A triadic melody is a melody made up of triads. Triads are chordsconsisting of three tones. The triad consists of the root tone, amajor or minor.
Because a triad consists of two stacked thirds, only the actual notes of the triad in a melody can avoid forming a major or minor second with one or other or its notes. In this way, a triad imposes a hierarchy on melody by highlighting which notes are part of the harmony (consonant) and which are not (dissonant). There are seven possible diatonic triads in C major (see triads definition), so it is possible to harmonise any note of the C major scale with a triad that will make it consonant.