What is a eccrine poroma?
Eccrine poroma was first reported by Pinkus in 1956 and represents 10% of all sweat gland tumors. [1] It is a benign neoplasm originating from the intraepidermal ductal portion of the eccrine sweat duct.
What is Syringocystadenoma Papilliferum?
Syringocystadenoma papilliferum is a benign adnexal skin tumour of the apocrine or the eccrine type with characteristic histological features and varied and non-distinct clinical findings. It is relatively a rare neoplasm, which is called as a childhood tumour, since it usually appears at birth or during puberty.
What does a poroma look like?
Clinically, a poroma is described as a sharply demarcated 2-12 mm papule or nodule, usually flesh or pink in color, though a pigmented variant has been reported (Figure 1).
Is eccrine Spiradenoma cancerous?
Eccrine spiradenoma is a fairly common benign sweat gland tumor that usually presents as a solitary tender nodule on the ventral aspect of the upper body.
What causes Hidradenoma Papilliferum?
Hidradenoma papilliferum tumors were previously believed to originate from apocrine sweat glands; however, some authors believe that rudimentary glandular structures, eccrine sweat glands or ectopic vulvar breast tissue could also be a possible source of the tumor 18).
What is a papillary Hidradenoma?
Papillary hidradenoma of the vulva is a rare, benign neoplasm arising from apocrine sweat glands of the skin. Frequently, this lesion has been mistaken for carcinoma. The treatment of choice is local excision. The prognosis for patients with this tumor is excellent.
Is trichoblastoma malignant?
While basal cell carcinoma rarely metastasizes, it is locally invasive [9]. In contrast, trichoblastoma rarely undergoes a malignant transformation into trichoblastic carcinoma, which is a locally invasive and metastatic tumor [1].
Is trichoblastoma cancerous?
Trichoblastoma is a small benign hair follicle tumour originating from follicular germinative cells.
What is malignant Hidradenoma?
Malignant nodular hidradenoma (MNH) is a rare tumor of sweat gland known by many names in the literature. Scalp is a known and yet uncommon site of occurrence. We describe two patients with scalp MNH with brain parenchymal invasion. Both tumors recurred in spite of total excision and radiotherapy.