IPA: /ˌæstrəˈsaɪtəʊmə/
KK: /æstrəˈsaɪtəʊmə/
A type of cancer that forms in the brain or spinal cord from star-shaped cells called astrocytes.
The doctor diagnosed her with an astrocytoma after reviewing the MRI results.
Astrocytoma is formed from "astro-" (from Greek "astron", meaning star) and "cytoma" (from Greek "kytos", meaning cell, and "oma", meaning tumor). The word describes a tumor that originates from star-shaped glial cells in the brain.
Think of 'star' ('astro-') shaped cells ('cytoma') forming a tumor — that's what an astrocytoma is.
No commonly confused words.