**Core Concept**
_Cryptococcus neoformans_ is a type of encapsulated yeast that causes cryptococcosis, a serious fungal infection primarily affecting immunocompromised individuals, such as those with HIV/AIDS. This pathogen is known for its ability to form a thick polysaccharide capsule, which plays a crucial role in its virulence.

**Why the Correct Answer is Right**
_Cryptococcus neoformans_ is a thermally dimorphic fungus, meaning it grows as a yeast at body temperature and as a mold at room temperature. The polysaccharide capsule is composed of glucuronoxylomannan, which is a key virulence factor that helps the fungus evade the host's immune system by inhibiting phagocytosis and inducing immune suppression. The capsule is also responsible for the organism's ability to cause meningitis and other central nervous system infections.

**Why Each Wrong Option is Incorrect**
**Option A:** While _Cryptococcus neoformans_ is indeed a type of encapsulated yeast, this statement is too vague and does not specify the organism, making it an incorrect choice.
**Option B:** This option is correct, but it's not the answer we're looking for, as it describes a characteristic of _Cryptococcus neoformans_. We need to find the exception.
**Option C:** This option is incorrect because _Cryptococcus neoformans_ is not typically associated with skin infections, unlike other fungal pathogens.

**Clinical Pearl / High-Yield Fact**
A key clinical feature of cryptococcosis is the presence of a thick, white, cotton-like exudate in the cerebrospinal fluid (CSF) of infected patients, which can be visualized on lumbar puncture. This characteristic exudate is often referred to as "pseudohyphae" or "yeast cells" and is a critical diagnostic finding.

**Correct Answer: D.**