noun which may take the genitive case particle 'no'
anaplastic
Medical term used in pathology to describe cells that have lost mature features and are undifferentiated, often associated with malignancy.
退形成性星細胞腫は悪性度の高い脳腫瘍です。
Anaplastic astrocytoma is a high-grade brain tumor.
退形成性 specifically refers to the loss of mature cell characteristics (anaplasia), while 未分化 means undifferentiated in a broader sense, not necessarily pathological.
Compound of 退形成 (anaplasia) + 性 (nature, -ic). 退形成 itself is a medical term combining 退 (reversion) and 形成 (formation).