CDT Cheat Sheet 2026

The 30 highest-yield CDT facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. Which grade in the ICDRG system represents a weak positive patch test reaction? → + (weak positive)
2. What is the role of sebaceous glands? → Sebum production
3. Which standard of practice is MOST important for ensuring quality in Laboratory Procedures & Biopsies? → Following evidence-based protocols while adapting to specific circumstances
4. Why is patient identification important before any procedure? → To avoid patient confusion
5. Which standard of practice is MOST important for ensuring quality in Common Skin Conditions & Treatment? → Following evidence-based protocols while adapting to specific circumstances
6. What is the primary purpose of applying a topical corticosteroid under occlusion (covered with plastic wrap)? → To enhance drug absorption and penetration into the skin
7. What is the primary dermatologic use of fluorouracil (5-FU) cream? → Treating actinic keratoses and superficial skin cancers
8. When a conflict arises between standard procedures and a unique situation in Common Skin Conditions & Treatment, what should a CDT professional prioritize? → Safety and ethical obligations while seeking expert consultation
9. Which symptom indicates a phototherapy overdose reaction requiring immediate intervention? → Severe blistering and pain
10. What is the purpose of using an autoclave? → For sterilization
11. A true positive (allergic) reaction on patch testing is best described as: → Vesicles, papules, and erythema that persist or worsen at 72–96 hours
12. Which skin function involves heat regulation? → Thermoregulation
13. What mandatory US risk management program must patients and providers enroll in before isotretinoin can be prescribed? → iPLEDGE REMS program
14. What condition are biologic agents like dupilumab (Dupixent) approved to treat? → Moderate-to-severe atopic dermatitis
15. Which body area is typically shielded in male patients during full-body phototherapy to reduce cancer risk? → Genitals
16. What does PUVA phototherapy combine? → Psoralen + UVA light
17. Which skin layer undergoes mitosis to create new skin cells? → Stratum basale
18. Which is a breach of ethical conduct in dermatology care? → Discussing a patient case publicly
19. In Laboratory Procedures & Biopsies, what is the FIRST step a CDT professional should take when encountering a new case or situation? → Conduct a comprehensive assessment and gather all relevant information
20. Which skin condition is photodynamic therapy (PDT) most commonly used to treat? → Actinic keratoses
21. When a conflict arises between standard procedures and a unique situation in Dermatological Assessment Methods, what should a CDT professional prioritize? → Safety and ethical obligations while seeking expert consultation
22. What is the PRIMARY purpose of continuing education requirements in Cosmetic Dermatology Assistance for CDT professionals? → Maintaining current knowledge and competency as the field evolves
23. When a conflict arises between standard procedures and a unique situation in Topical Medication Administration, what should a CDT professional prioritize? → Safety and ethical obligations while seeking expert consultation
24. Which condition is characterized by facial redness and visible blood vessels? → Rosacea
25. Which condition is a contraindication for phototherapy due to UV-triggered flares? → Lupus erythematosus
26. In Patient Education & Counseling, what is the FIRST step a CDT professional should take when encountering a new case or situation? → Conduct a comprehensive assessment and gather all relevant information
27. When a conflict arises between standard procedures and a unique situation in Skin Cancer Screening & Education, what should a CDT professional prioritize? → Safety and ethical obligations while seeking expert consultation
28. What is the purpose of applying antiseptic before a procedure? → To minimize infection risk
29. In Common Skin Conditions & Treatment, what is the FIRST step a CDT professional should take when encountering a new case or situation? → Conduct a comprehensive assessment and gather all relevant information
30. Topical corticosteroids at the patch test application site should be: → Discontinued for at least 1–2 weeks before testing on that skin area