A 6-year-old patient complains of a constantly itchy scalp that developed after returning home from school today. The most common cause for this condition in a child is:
A. Seborrheic dermatitis
B. Pediculosis
C. Psoriasis
D. Basal cell carcinoma
ANS: B
It would be unusual for pruritus in the head and neck to indicate anything except a skin condition/disease or infestation. If the patient is a school-age child, pediculosis (head lice) is an obvious choice, and the child's friends and school administrators should be questioned about recent outbreaks. Nits are lice eggs that are fixed to the hair shaft and are grayish-white in appearance. Unlike the flakiness of seborrhea or psoriasis, nits cannot be easily dislodged. Basal cell carcinoma is a slow-growing, invasive type of skin cancer that occurs on sun-exposed regions of the head, such as the nose.
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