Hair casts. Review and suggestion regarding nomenclature

Hair casts due to a deodorant spray

“…The second, uncommon type of hair casts, which affected our described patient, usually occurs as an isolated abnormality in the absence of primary scalp disease. The prevalence of reported cases of this disorder appears to concern young females, a fact that may confirm the important role of exogenous factors, such as the frequency of use of certain hair‐care products by women 5–11 . Non‐keratin casts, such as bacterial hair casts, mycotic hair casts and artefactual hair casts are also considered uncommon types 10 .…”

“…The fluorescent features displayed by the casts differ, perhaps depending upon the particular chemical components of the external agents precipitating the condition 1,12 . It is possible that hair casts may be a reaction to hair traction or to chemicals applied to the hair and scalp in predisposed subjects 11,13 . The hypertraction of hair on the hair follicles exacerbated by certain hairstyles (such as ponytails or braids) can lead to mild follicular inflammation (traction folliculitis), microcirculatory problems and root disturbance leading to an alteration in the growth pattern of hair.…”

Hair casts due to a deodorant spray

“…The second, uncommon type of hair casts, which affected our described patient, usually occurs as an isolated abnormality in the absence of primary scalp disease. The prevalence of reported cases of this disorder appears to concern young females, a fact that may confirm the important role of exogenous factors, such as the frequency of use of certain hair‐care products by women 5–11 . Non‐keratin casts, such as bacterial hair casts, mycotic hair casts and artefactual hair casts are also considered uncommon types 10 .…”

“…The fluorescent features displayed by the casts differ, perhaps depending upon the particular chemical components of the external agents precipitating the condition 1,12 . It is possible that hair casts may be a reaction to hair traction or to chemicals applied to the hair and scalp in predisposed subjects 11,13 . The hypertraction of hair on the hair follicles exacerbated by certain hairstyles (such as ponytails or braids) can lead to mild follicular inflammation (traction folliculitis), microcirculatory problems and root disturbance leading to an alteration in the growth pattern of hair.…”

Tubular hair casts in trichoscopy of hair and scalp disorders

“…After the first description of hair cast by Klingman in 1957,[1] few authors have described and classified the HCs based on their composition. [23] Brunner[10] described them as persistent hair root sheaths that had failed to disintegrate. Scott and Roenigk[2] in 1983 proposed a two-group classification of hair casts.…”

“…They also presented a practical staining technique that differentiates PKCs from other types of casts. Keipert[3] also classified HCs into two types - the parakeratotic HC which was frequently associated with parakeratotic scalp disorders and the PKC which was defined as a tubular or cylinder shaped structure encircling the hair shaft and whose length is greater than the width and is much more regular. He described PKC as an uncommon type of cast which is not usually associated with scalp diseases and seen only in the female.…”

A Case of Peripilar Hair Casts

“…The first, associated with parakeratotic disorders of the scalp, occurring commonly in children and adults of both genders, called as parakeratotic hair casts. 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 .…”

Hair casts due to a deodorant spray

“…The second, uncommon type of hair casts, which affected our described patient, usually occurs as an isolated abnormality in the absence of primary scalp disease. The prevalence of reported cases of this disorder appears to concern young females, a fact that may confirm the important role of exogenous factors, such as the frequency of use of certain hair‐care products by women 5–11 . Non‐keratin casts, such as bacterial hair casts, mycotic hair casts and artefactual hair casts are also considered uncommon types 10 .…”

“…The fluorescent features displayed by the casts differ, perhaps depending upon the particular chemical components of the external agents precipitating the condition 1,12 . It is possible that hair casts may be a reaction to hair traction or to chemicals applied to the hair and scalp in predisposed subjects 11,13 . The hypertraction of hair on the hair follicles exacerbated by certain hairstyles (such as ponytails or braids) can lead to mild follicular inflammation (traction folliculitis), microcirculatory problems and root disturbance leading to an alteration in the growth pattern of hair.…”

Tubular hair casts in trichoscopy of hair and scalp disorders

“…After the first description of hair cast by Klingman in 1957,[1] few authors have described and classified the HCs based on their composition. [23] Brunner[10] described them as persistent hair root sheaths that had failed to disintegrate. Scott and Roenigk[2] in 1983 proposed a two-group classification of hair casts.…”

“…They also presented a practical staining technique that differentiates PKCs from other types of casts. Keipert[3] also classified HCs into two types - the parakeratotic HC which was frequently associated with parakeratotic scalp disorders and the PKC which was defined as a tubular or cylinder shaped structure encircling the hair shaft and whose length is greater than the width and is much more regular. He described PKC as an uncommon type of cast which is not usually associated with scalp diseases and seen only in the female.…”

A Case of Peripilar Hair Casts

“…The first, associated with parakeratotic disorders of the scalp, occurring commonly in children and adults of both genders, called as parakeratotic hair casts. 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 .…”

Hair casts due to a deodorant spray

“…The second, uncommon type of hair casts, which affected our described patient, usually occurs as an isolated abnormality in the absence of primary scalp disease. The prevalence of reported cases of this disorder appears to concern young females, a fact that may confirm the important role of exogenous factors, such as the frequency of use of certain hair‐care products by women 5–11 . Non‐keratin casts, such as bacterial hair casts, mycotic hair casts and artefactual hair casts are also considered uncommon types 10 .…”

“…The fluorescent features displayed by the casts differ, perhaps depending upon the particular chemical components of the external agents precipitating the condition 1,12 . It is possible that hair casts may be a reaction to hair traction or to chemicals applied to the hair and scalp in predisposed subjects 11,13 . The hypertraction of hair on the hair follicles exacerbated by certain hairstyles (such as ponytails or braids) can lead to mild follicular inflammation (traction folliculitis), microcirculatory problems and root disturbance leading to an alteration in the growth pattern of hair.…”

Tubular hair casts in trichoscopy of hair and scalp disorders

“…After the first description of hair cast by Klingman in 1957,[1] few authors have described and classified the HCs based on their composition. [23] Brunner[10] described them as persistent hair root sheaths that had failed to disintegrate. Scott and Roenigk[2] in 1983 proposed a two-group classification of hair casts.…”

“…They also presented a practical staining technique that differentiates PKCs from other types of casts. Keipert[3] also classified HCs into two types - the parakeratotic HC which was frequently associated with parakeratotic scalp disorders and the PKC which was defined as a tubular or cylinder shaped structure encircling the hair shaft and whose length is greater than the width and is much more regular. He described PKC as an uncommon type of cast which is not usually associated with scalp diseases and seen only in the female.…”

A Case of Peripilar Hair Casts

“…The first, associated with parakeratotic disorders of the scalp, occurring commonly in children and adults of both genders, called as parakeratotic hair casts. 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 .…”