Trichofolliculoma. A large central follicular structure from which immature follicular structures radiate.
Lymphadenoma. Nests and lobules of epithelial cells with prominent infiltration by lymphocytes.
Sebaceous adenoma. Small yellowish papule.
Syringocystadenoma papilliferum. Papillary projections with a fibrovascular stroma.
Poroma. Note the clear demarcation between the tumour and the neighbouring epidermis.
Eruptive syringomas. Multiple tiny brownish or red lesions are often seen on the trunk and limbs.
Eccrine spiradenoma. Ductal structures and intermixed pale and dark cells.
Mucinous carcinoma. Nests of tumour cells surrounded by pools of mucin.
Extramammary Paget disease of the vulva showing inflamed eczematous presentation.
Typical example of a trichofolliculoma with a small tuft of hairs in the centre.
Pilomatricoma. Lobules of basaloid cells intermixed with pale pink areas containing ghost cells (arrow).
Sebaceous carcinoma. Ulcerated yellowish lesion of the eyelid.
Syringocystadenoma papilliferum. Papular lesion with superficial erosion.
Poroma. Note the red shiny surface, which often leads to misdiagnosis of a pyogenic granuloma.
Hidradenoma. Red‐brown irregular papule.
Eccrine spiradenoma. Extensive haemorrhage with or without ischaemic necrosis may result in rapid clinical growth. Only small areas of residual spirad...
Pathology of Paget disease of the breast: note colonization of the epidermis with large pleomorphic cells.
Trichoepithelioma. A lobular basaloid tumour with induction of stroma and immature follicular differentiation.
Pilomatricoma. Small red firm papule.
Apocrine hidrocystoma. Cystic cavity lined by cuboidal cells with pink cytoplasm and decapitation secretion.
Hidradenoma papilliferum. Well‐circumscribed tumour with glands and papillary projections displaying apocrine differentiation.
Syringoma. Typical ductal structures with a tadpole appearance.
Cylindroma. Classical jigsaw‐puzzle architecture with tumour lobules displaying a thick basal membrane.
Apocrine mixed tumour. Notice the apocrine glands with a surrounding myxoid/hyalinized stroma with fatty metaplasia.
Paget disease of the nipple. Distant clinical view showing unilateral lesion.
Multiple trichoepitheliomas on the central face.
Sebaceous adenoma. Lobular lesion with prominent maturation in the centre and immature cells in the periphery.
Apocrine hidrocystoma. Cystic translucent papule on the right inner canthus.
Apocrine carcinoma. Prominent glands with decapitation secretion. Note the epidermotropism.
Multiple syringomas on the upper cheek area.
Cylindroma. Two large tumours on the head of an elderly woman.
Microcystic adnexal carcinoma. Strands and small nests of bland epithelial cells with an infiltrative growth pattern.
Paget disease of the nipple. Close‐up view showing erythema and well‐marked lateral edge of the lesion.