What are common symptoms of ectodermal dysplasia?

Ectodermal dysplasia is a group of genetic disorders characterized by abnormalities in structures that arise from the ectoderm, which includes the skin, hair, nails, teeth, and sweat glands. Individuals with ectodermal dysplasia often present with a distinctive set of symptoms that typically include the absence or partial development of teeth, a condition known as hypodontia or anodontia, and abnormalities in sweat glands, leading to issues with thermoregulation.

The correct choice highlights these key features: individuals with ectodermal dysplasia may have fewer teeth or missing teeth altogether, and they may also have reduced or absent sweat glands, which can result in an inability to sweat normally, potentially leading to overheating in hot weather. This combination of symptoms is indicative of the condition and helps differentiate it from other disorders that might present with unrelated symptoms.

In contrast, the other options include symptoms that are not associated with ectodermal dysplasia. For example, severe hair loss and fever, joint pain and reduced mobility, or issues with color vision and night blindness do not align with the specific manifestations of ectodermal dysplasia, as these symptoms relate to other medical conditions.