**Core Concept**
Ketoacidosis, a metabolic complication of diabetes, occurs when the body produces high levels of ketones due to a lack of insulin. This leads to an accumulation of acidic substances in the blood, causing a range of symptoms and complications.

**Why the Correct Answer is Right**
Ketoacidosis without glycosuria is a rare condition that can occur in individuals with type 1 diabetes, particularly in those who are newly diagnosed or have not yet developed insulin resistance. This condition is also known as "ketosis without hyperglycemia." The absence of glycosuria (glucose in the urine) in ketoacidosis is due to the kidneys' ability to conserve glucose in the presence of high ketone levels, which can occur in individuals with very low insulin levels or those who are taking certain medications that block glucose reabsorption in the kidneys.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because ketoacidosis without glycosuria is not typically associated with type 2 diabetes, which is characterized by insulin resistance and hyperglycemia.

**Option B:** This option is incorrect because diabetic nephropathy, a complication of diabetes, is characterized by proteinuria (protein in the urine) rather than glycosuria.

**Option C:** This option is incorrect because lactic acidosis, a metabolic complication of certain medications and medical conditions, is characterized by an elevated lactate level in the blood rather than ketones.

**Clinical Pearl / High-Yield Fact**
In cases of ketoacidosis without glycosuria, it's essential to investigate for other underlying causes, such as pancreatitis, adrenal insufficiency, or certain medications that can lead to ketoacidosis.

**Correct Answer: D. Diabetic ketoacidosis (DKA) can occur in type 1 diabetes without glycosuria due to the kidneys conserving glucose in the presence of high ketone levels.**