Which of the following is not a condition of a tubular nail disorder?

A tubular nail disorder is characterized by various changes in the structure and appearance of the nails. Thickening of the nail, discoloration, and improper nail growth are common symptoms of these disorders.

Thickening of the nail often occurs as a response to trauma or a chronic condition that affects nail growth. Discoloration can indicate underlying health issues or nutrient deficiencies, while improper nail growth may lead to shapes that differ from the normal, flat, and smooth appearance of healthy nails.

Fluid accumulation, however, is not typically associated with tubular nail disorders. While fluid may accumulate in other types of nail issues or conditions, such as infections or inflammation, it does not characterize tubular nail disorders specifically. Therefore, this option represents a condition that does not align with the definitions or characteristics of tubular nail disorders.