Byline: Pragya. Nair, Trusha. Patel, Radhika. Navadiya
Circle hairs (CHs) represent a body hair growth disorder which is characterized by asymptomatic presence of hairs in typical circular or spiraliform arrangement. It is not associated with follicular or inflammatory abnormalities. CHs are rarely reported, probably underestimated, as medical consultation for CH only is rare in practice. It needs to be differentiated from rolled hairs, which is a relatively common disorder of hair growth associated with follicular hyperkeratosis and keratin plugging. Trichoscopy is a noninvasive technique to confirm the diagnosis without biopsy. We present a 20-year-old female who presented with CHs over bilateral upper and lower limbs involving extensors.
Circle hairs (CHs) represent a body hair growth disorder. It is characterized by asymptomatic presence of hairs with typical circular or spiraliform arrangement. It is not associated with follicular or inflammatory abnormalities. CHs are genetically predetermined disorder which corresponds to vestigia (or remnants) of the mammal undercoat. It is usually seen in elderly, hairy and obese males, predominantly affecting thighs. These peculiar hairs grow in a circular horizontal distribution beneath the stratum corneum and are considered benign incidental findings. Their exact cause is unknown. If taken out and unrolled, their length and diameter tend to be smaller than surrounding hairs. CHs develop as a result of lack of their size which is necessary to perforate the stratum corneum. Some of the scientists have proposed that they are vestigial remains that once had a part in preserving body heat.
We present a 20-year-old female...