Which term describes hair that may split at any part of their length?

• A. Fragilitas crinium
• B. Trichorrhexis nodosa
• C. Trichoptilosis
• D. Pili annulati

Answer: (A)

The main idea here is understanding how hair breakage patterns are described in terminology. Fragilitas crinium refers to hair that is fragile and prone to breakage along the shaft, so splits can occur at any point—not just at the ends. This makes it the best fit for a description where hair may split anywhere along its length.

In contrast, trichorrhexis nodosa involves frayed, swollen nodes along the shaft where breakage tends to occur at these nodal points, not uniformly along the entire length. Trichoptilosis specifically denotes split ends, meaning splits only at the very tip of the hair. Pili annulati describes a beaded appearance with bands along the hair, not a pattern of splitting.