Eruptive Vellus Hair Cysts in a Patient with Mental Retardation / 대한피부과학회지

Eruptive vellus hair cysts (EVHCs) are small, red- or brown-colored cystic papules that usually occur on the chest and proximal extremities of children and adults. Histologically, these small cysts are observed in the mid-dermis and contain multiple hair shafts and keratinous material. Pathogenesis of EVHC has not been completely understood. A 40-year-old man with mental retardation presented with multiple bluish papules on his back. A biopsy specimen showed features of eruptive vellus hair cysts. We report a case of EVHC that occurred at an unusual site in a patient with mental retardation.

A Case of the Facial Variant of Eruptive Vellus Hair Cyst / 대한피부과학회지

Eruptive vellus hair cysts (EVHC) are characterized by multiple, small, discrete red or brown colored papules that usually occur on the chest and extremities. Their etiology is unknown. A variant form of EVHC that occur exclusively on the face is rare and it is very characteristic for its location and color. We report here on a facial variant of EVHC that occurred on the face of 23-year-old woman with asymptomatic, skin-colored to bluish tiny papules. The lesions first appeared at the age of 22-years.

Two Cases of Eruptive Vellus Hair Cysts Developed on The Atypical Sites / 대한피부과학회지

Eruptive vellus hair cysts are characterized by asymptomatic, skin colored to bluish, or brownish, 1-4mm sized, follicular papules and nodules located on mainly anterior chest, axilla, groin, and thigh. Histopathologic examination reveals cysts containing multiple vellus hairs and the laminated keratinous materials at dermis. We reported 2 cases of eruptive vellus hair cysts developed on the unusual sites, forehead and buttock, respectively.

A Case of Eruptive Vellus Hair Cyst: Facial Variant / 대한피부과학회지

Eruptive vellus hair cysts(EVHCs) are small, red or brown colored cystic papules that usually occur on the chest and proximal extremities of children and adults. Although EVHCs, facial variant, is rare and chracteristic in its location and color, histopathological findings of facial variant are not different from those of typical EVHC. We report a case of EVHC, facial variant which occured on the face of 23-year-old man with asymptomatic, bluish papules. The lesions first appeared at the age of 19 years and had increased in number thereafter.

Eruptive Vellus Hair Cysts in Association with Hypomelanosis of Ito with Turner's Syndrome

A 24-year Korean woman presented with bizarre pigmentary skin changes. Eruptive vellus hair cysts (EVHC) were observed in conjunction with Hypomelanosis of Ito (HI). Also, the karyotype of 45XO with typical clinical symptoms of Turner's syndrome was detected in this patient, which has been rarely reported in HI as a chromosomal defect. EVHC may manifest as a rare skin manifestation of Hl.

A Case of Eruptive Vellus Hair Cysts / 대한피부과학회지

A 22-year-old-male patient has numerous brownish-black, soft follicular papules which compatible with acne are scattered on the chest, scapular regions, back and buttocks for 4 5 years duration. Biopsy specimen revealed cystic structures in the mid-dermis lined by squamous cell epithelium w4ich contained laminated keratinous material and varying number of vellus hairs, histopathologically, compatible with diagnosis of eruptive vellus hair cysts. Related literatures and histogenesis were discussed,