Hyvänlaatuisilla
Hyvänlaatuisilla is a Finnish word form used as the adessive plural of the adjective hyvänlaatuinen, meaning benign or of good quality. The term is widely used in medical Finnish to describe non-cancerous growths, tissues, or cells, in contrast to pahanlaatuinen, which means malignant. The base adjective hyvänlaatuinen combines hyvän (genitive of hyvä, "good") with laatuinen ("of quality"), and yields forms such as hyvänlaatuinen (singular nominative), hyvänlaatuiset (plural nominative), and hyvänlaatuisilla (plural adessive). The adessive form is used when the described noun is plural and in the adessive case, for example hyvänlaatuisilla kasvaimilla (on benign tumors) or hyvänlaatuisilla soluilla (with benign cells).
In medical contexts hyvänlaatuinen describes lesions, tumors, or cellular conditions that do not invade neighboring tissue
Etymology: a compound of hyvän (genitive of hyvä) and laatuinen ('of quality'). See also pahanlaatuinen (malignant);