PMC3919849_01
Case 1. (A) A group of papules on the chest with linear distribution pattern. (B) Dermoscopy of sebaceous gland hyperplasia. Note the aggregation of yellowish-white clods with linear vessels between or above the clods. (C) Dermoscopy of sebaceous gland hyperplasia followed by HDR image conversion. Note the multi-lobulated clods with central openings. (D) Hematoxylin and eosin staining of biopsied lesion of sebaceous gland hyperplasia: Note the multiple, mature sebaceous lobules attached to the central dilated duct in the upper dermis. Original magnification x25. [Copyright:  2014 Sato et al.]
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A 39-year-old Japanese man presented with 6-month history of a group of papules on the chest (Figure 1A). Dermoscopic examination demonstrated aggregation of yellowish-white clods with linear vessels between or above the clods exhibiting reticular distribution as a whole (Figure 1B). High dynamic range (HDR) conversion of the dermoscopy photograph further clarified the multi-lobulated clods with a central opening (Figure 1C). Histopathological examination of the biopsied lesions established the diagnosis of sebaceous hyperplasia (SH) (Figure 1D).
PMC3919849_02
Case 2. (A) Multiple papules on the chest showing linear arrangement. (B) Dermoscopy of sebaceous gland hyperplasia. Note the aggregation of yellowish-white clods with vague linear vessels surrounding the clods. (C) Dermoscopy of sebaceous gland hyperplasia followed by HDR image conversion. Note the multi-lobulated clods with central openings and surrounding vessels. [Copyright:  2014 Sato et al.]
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A 32-year-old Japanese woman presented with a 5-year history of linearly arranged papules on the upper chest (Figure 2A). Dermoscopic examination demonstrated aggregation of yellowish-white clods with vague linear vessels surrounding the clods (Figure 2B). HDR image conversion of the dermoscopy photograph further clarified the multi-lobulated clods and the surrounding vessels (Figure 2C).