Hair casts or pseudonits

França, Katlein; Villa, Ricardo Tadeu; Silva, Isabella Rezende; Carvalho, Cristine Almeida de; Bedin, Valcinir

doi:10.4103/0974-7753.90834

Cited by 18 publications

(15 citation statements)

References 13 publications

(10 reference statements)

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“…The second type is not associated with the later disorders and occurs in women, gave the name of keratinous hair casts 7 . Differences between peripilar keratin casts and parakeratotic hair cast is given in table-1 8 . The differential diagnoses of hair casts include pediculosis capitis, piedra, trichomycosis, trichonodosis and trichorrhexis nodosa.…”

Section: Discussionmentioning

confidence: 99%

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A Case of Peripilar Hair Casts

Ramteke¹

2015

J Cont Med A Dent

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Section: Discussionmentioning

confidence: 99%

“…Treatment with keratolytic shampoos is not very effective. Apart from manual removal and combing, 0.025% retinoic acid works best for this condition but it can recur following stoppage of treatment 9 .…”

Section: Discussionmentioning

confidence: 99%

A Case of Peripilar Hair Casts

Ramteke¹

2015

J Cont Med A Dent

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“…4,5 In addition to physical removal, keratolytic lotions or shampoos are helpful. França and colleagues 1 have described resolution with a solution of 0.025% retinoic acid, and we have seen good results with a 3% salicylate lotion; both of these agents are keratolytics.…”

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confidence: 98%

“…Varying in length (2-7 mm), pseudonits slide easily along the shaft without breaking it. 1 Pseudo nits consist of keratinized cells from both the internal and the external epithelial sheaths of the hair root. They are classified as primary when there is no associated scalp cond ition, and as secondary when associated with scaling scalp conditions such as seborrheic dermatitis and psoriasis.…”

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confidence: 99%

Hair casts (pseudonits)

Ruiz‐Villaverde

Galán‐Gutiérrez

2012

CMAJ

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A 9-year-old girl was referred to our dermatology clinic for an assessment of whitish granules attached to her hair. She was otherwise healthy and had no history of pruritis of the scalp. Her parents had noticed the granules 8 months previously, and she had already received antiscabetic and antifungal treatments (3 weekly courses of 1.5% permetrin lotion, and daily ketoconazole shampoo for 2 mo). On physical examination, we found easily sliding, whitish structures encircling the shafts of the patient's hair (Figure 1A and 1B). She did not have alopecia, and her scalp was not inflamed. A full inspection of the patient's skin was normal. We diagnosed pseudonits and prescribed a keratolytic lotion of 3% salicylic acid. In addition, we recommended using a thin-tooth comb and avoiding traction movements when combing the hair. At a 2-month follow-up, the pseudonits had resolved almost completely.Peripillous sheaths, also called pseudonits or hair casts, are white-to-yellow tubular structures that encircle the proximal hair shafts of the scalp. Varying in length (2-7 mm), pseudonits slide easily along the shaft without breaking it.1 Pseudo nits consist of keratinized cells from both the internal and the external epithelial sheaths of the hair root. They are classified as primary when there is no associated scalp cond ition, and as secondary when associated with scaling scalp conditions such as seborrheic dermatitis and psoriasis.2,3 The differential diagnosis includes dandruff, white piedra, trichorrehexis nodosa, monilethrix, trichomycosis and trichonodosis.Pseudonits can be differentiated from nits by an absence of pruritis and by their mobility along the hair shaft -nits do not slide. If available, dermoscopic examination will show the tubular shape of pseudonits, which helps differentiate them from nits, which are oval. 4,5 In addition to physical removal, keratolytic lotions or shampoos are helpful. França and colleagues 1 have described resolution with a solution of 0.025% retinoic acid, and we have seen good results with a 3% salicylate lotion; both of these agents are keratolytics.

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“…[1] Few cases of hair casts have been reported in the literature. The condition has a female predominance.…”

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Hair casts

Parmar

Shah

2014

Indian Dermatol Online J

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Hair casts or pseudonits are circumferential concretions, which cover the hair shaft in such a way that, it could be easily removed. They are thin, cylindrical, and elongated in length. We present an unusual case of an 8-year-old girl presenting with hair casts. Occurrence of these is unusual, and they may have varied associations. This patient was suffering from developmental delay. It is commonly misdiagnosed as and very important to differentiate from pediculosis capitis.

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Hair casts or pseudonits

Abstract: Hair casts or pseudonits are thin, elongated, cylindrical concretions that encircle the hair shaft and can be easily dislodged. A case of pseudonits in a 9-year-old girl is reported. Though not unusual, false diagnoses are common.

Cited by 18 publications

References 13 publications

A Case of Peripilar Hair Casts

A Case of Peripilar Hair Casts

Hair casts (pseudonits)

Hair casts

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