Which term describes the dry, yellow crusts on the scalp with a distinctive odor?

Which term describes the dry, yellow crusts on the scalp with a distinctive odor?

• A. Scabies
• B. Pityriasis
• C. Tinea favosa
• D. Pediculosis capitis

Answer: (C)

This question tests recognition of a scalp condition by its crusts and odor. The dry, yellow crusts on the scalp with a distinctive odor are characteristic of tinea favosa (favus), a form of fungal infection of the scalp. The crusts, called scutula, are thick and yellow and often come with hair breakage or loss, and they produce a musty, distinctive smell. Scabies causes intense itching and a pimple-like rash from mites, not yellow crusts on the scalp. Pediculosis capitis involves head lice and nits with itching. Pityriasis capitis (dandruff) presents with flaky scales but not thick yellow crusts with a strong odor.

This question tests recognition of a scalp condition by its crusts and odor. The dry, yellow crusts on the scalp with a distinctive odor are characteristic of tinea favosa (favus), a form of fungal infection of the scalp. The crusts, called scutula, are thick and yellow and often come with hair breakage or loss, and they produce a musty, distinctive smell.

Scabies causes intense itching and a pimple-like rash from mites, not yellow crusts on the scalp. Pediculosis capitis involves head lice and nits with itching. Pityriasis capitis (dandruff) presents with flaky scales but not thick yellow crusts with a strong odor.