ABSTRACT
Blue nevus is a neoplasm composed of pigmented dendritic dermal melanocytic cells in the reticular dermis. The lesion clinically presents as a well dermacated cerulean-blue or bluish black colored papule or plaque that usually measure less than 1 cm in diameter. Pilar sheath acanthoma is a rare, benign follicular hamartoma commonly affecting middle-aged and elderly individuals. It is characterized by a small, solitary, skin colored papule situated on the head and neck, particularly around the upper lip. We report a rare case of a blue nevus associated with a pilar sheath acanthoma in a 26 year-old man presented with a bluish papule on the neck.
Subject(s)
Aged , Humans , Acanthoma , Dermis , Hamartoma , Head , Lip , Neck , Nevus, Blue , SkinABSTRACT
Pilar sheath acanthoma is a rare, benign follicular hamartoma commonly affecting middle-aged and elderly individuals. It is characterized by a small, solitary, skin-colored papule situated on the head and neck, particularly around the upper lip. The lesion shares some features with trichofolliculoma and dilated pore of Winer, so it should be differentiated from these. Cytokeratin (CK) is a useful marker for studying the origin of epithelial tumors. We report a case of pilar sheath acanthoma which originated from outer root sheath using CK.
Subject(s)
Aged , Humans , Acanthoma , Follicular Cyst , Hamartoma , Head , Keratins , Lip , Neck , Neoplasms, Basal Cell , Skin NeoplasmsABSTRACT
Pilar sheath acanthoma is one of the benign follicular hamartoma, with a level of differentiation between trichofolliculoma and dilated pore of Winer. It differentiates toward infundibulum, isthmus, and rarely, sebaceous duct, apocrine, inner root sheath, and hair bulb components. It is a dome-shaped, symmetrical, sharply-circumscribed neoplasm that measures about 1cm in diameter. We herein report a case of pilar sheath acanthoma on the forehead of a 62-year-old male patient.
Subject(s)
Humans , Male , Middle Aged , Acanthoma , Forehead , Hair , HamartomaABSTRACT
Pilar sheath acanthoma is a rare, benign follicular tumor, which is found almost exclusively on the upper lip of adults. As a consequence of histologic analogy, pilar sheath acanthoma should be differentiated from trichofolliculoma and dilated pore of Winer. We report a case of pilar sheath acanthoma, presenting as an asymptomatic solitary skin-colored papule on the anterior neck, with a review of clinical and histopathological characteristics.
Subject(s)
Adult , Humans , Acanthoma , Lip , NeckABSTRACT
A 52-year-old male presented with a solitary asymptomatic, skin-colored nodule with a central pore on the skin of the left cheek of one year duration. An excisional biopsy was performed. The skin biopsy finding showed the typical histological picture of pilar sheath acanthoma. A description of the lesion and a review of the literature are given.
Subject(s)
Humans , Male , Diagnosis, Differential , Facial Neoplasms/pathology , Middle Aged , Papilloma/pathologyABSTRACT
A 52-year-old male presented with a solitary asymptomatic, skin-colored nodule with a central pore on the skin of the left cheek of one year duration. An excisional biopsy was performed. The skin biopsy finding showed the typical histological picture of pilar sheath acanthoma. A description of the lesion and a review of the literature are given.