Here’s a short, pharmacist-focused summary of tumor grades:
- Grade 1 (Well-differentiated): Cells resemble normal tissue, slow growth, less aggressive.
- Grade 2 (Moderately differentiated): Intermediate appearance and growth rate.
- Grade 3 (Poorly differentiated): Cells look very abnormal, fast-growing, aggressive.
- Grade 4 (Undifferentiated/Anaplastic): No resemblance to normal tissue, highly aggressive, poor prognosis.
Key point for oncology pharmacists: Higher grade = faster proliferation, more aggressive disease, and usually need for systemic therapy (chemo, targeted, or immunotherapy).