Peripilar keratin cysts or pseudonits: When nits are not nits!
نویسندگان
چکیده
A 19 yr old girl presented to the Dermatology Outpatient Clinic of Dr. R. P. Government Medical College, Kangra (Tanda), Himachal Pradesh, India, in April 2015, with whitish cylindrical nits-like structures of variable sizes encircling scalp hair shafts (Fig. 1) for the past 5-6 months. Their removal by washing or combing and treatments for pediculosis was unsuccessful. She did not have seborrhoeic dermatitis or pediculosis capitis. KOH mounts showed no fungus. A diagnosis of peripilar keratin cysts was made after light microscopy and dermatoscopic examination (Fig. 2). Tretinoin 0.025 per cent solution application overnight, shampooing and combing next morning for two weeks was useful, after that she did not come for follow up.
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Adult Onset Hair Casts: Nits Which Do Not Itch!
Hair casts (HCs) are thin, elongated, firm, whitish cylindrical concretions which ensheath the hair shaft and can be easily dislodge. They are of two different types: peripilar and parakeratotic keratin cast. Due to its clinical resemblance to pediculosis capitis, the entity is also known as pseudonits. Al though not unusual, false diagnoses are common, and thus, it is very important to correct...
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