English to Italian Medical Medical (general) chirurgia

Si tratta di un manuale americano di chirurgia, capitolo relativo al sistema biliare.
Nel paragrafo sulle lesioni polipoidi della cistifellea trovo queste frasi:

Pseudotumors are further divided into cholesterol polyps and adenomyomatosis. Cholesterol polyps appear as pedunculated echogenic lesions of the gallbladder, are usually smaller than 1 cm, and are frequently multiple. Alternatively, adenomyomatosis is seen as a sessile lesion, commonly in the fundus, with characteristic microcysts within the lesion, and is frequently larger than 1 cm (Fig.xxx). Adenomas are benign growths in the wall of the gallbladder that may be difficult to differentiate from adenocarcinoma preoperatively because the only difference is that of transmural invasion, which can be challenging to detect by ultrasonography.

Si può tradurre crescite benigne? proliferazioni benigne??
Grazie.