Abstract
A 29-year-old Japanese man presented to our institution with a nodule on his nose that had increased in size since childhood. Physical examination indicated the presence of an elastic, firm, pedunculated red nodule measuring 15 mm in size. Dermatoscopic examination of the nodule indicated a yellowish-white network, yellowish-orange dots/globules at its center, and a pinkish-white structureless peripheral area. Histopathological examination of an excisional biopsy specimen showed a dilated infundibulocystic structure with sebaceous lobules proliferating radially, surrounded by fibrous stroma. Moreover, mature adipocytes and small vessels were noted in the stroma. Based on these histopatho-logic findings, the patient was diagnosed with folliculosebaceous cystic hamartoma.
Highlights
A 29-year-old Japanese man presented to our institution with a nodule on his nose that had increased in size since childhood
No hair shafts were present in the cystic cavity. These findings were consistent with a diagnosis of folliculosebaceous cystic hamartoma (FSCH)
Certain histopathologic features of FSCH are believed to be distinct, and this condition can be differentiated from sebaceous trichofolliculoma (STF)
Summary
A 29-year-old Japanese man presented to our institution with a nodule on his nose that had increased in size since childhood. Dermatoscopic examination of the nodule indicated a yellowishwhite network, yellowish-orange dots/globules at its center, and a pinkish-white structureless peripheral area. Histopathological examination of an excisional biopsy specimen showed a dilated infundibulocystic structure with sebaceous lobules proliferating radially, surrounded by fibrous stroma.
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