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.
A triad is a chord constructed with 3 notes. When in root position (the root note is on the bottom) each note is a third away from the last (if intervals are new to you check out the intervals tutorial). Triads are a basic chord structure and the basis of how other types of chords are constructed. There are four types of triads: 1  Major. 2  Minor. 3  Augmented. 4  Diminished.