Which statement about lysosomal storage diseases is not true?

Which statement about lysosomal storage diseases is not true?

• A. I
• B. III
• C. I, II
• D. I, II, III, IV

Answer: (D)

Lysosomal storage diseases come from missing or defective lysosomal enzymes, which leads to buildup of substances in cells and a wide range of effects on different organs. Because there are many different enzymes and substrates involved, these diseases show diverse inheritance patterns and clinical presentations, from neurodegeneration to organ enlargement to bone and growth issues. Treatments exist for some of them, such as enzyme replacement therapy, but not for all, especially when the central nervous system is affected. To answer a “not true” statement about lysosomal storage diseases, you weigh each claim against these established facts: the diseases are caused by enzyme deficiencies with substrate accumulation, they have variable inheritance and presentation, and therapy options vary in effectiveness. In this item, the chosen option indicates that all four statements are not true, which aligns with the test key for this question.

Lysosomal storage diseases come from missing or defective lysosomal enzymes, which leads to buildup of substances in cells and a wide range of effects on different organs. Because there are many different enzymes and substrates involved, these diseases show diverse inheritance patterns and clinical presentations, from neurodegeneration to organ enlargement to bone and growth issues. Treatments exist for some of them, such as enzyme replacement therapy, but not for all, especially when the central nervous system is affected. To answer a “not true” statement about lysosomal storage diseases, you weigh each claim against these established facts: the diseases are caused by enzyme deficiencies with substrate accumulation, they have variable inheritance and presentation, and therapy options vary in effectiveness. In this item, the chosen option indicates that all four statements are not true, which aligns with the test key for this question.