Clinical Reference / Clinical Atlas / Miscellaneous Benign Neoplasms

Miscellaneous Benign Neoplasms

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Fig. 102-1 A

Miscellaneous benign neoplasms: Apocrine papillated cystadenoma is benign by virtue of its symmetry, sharp circumscription, and uniform hue, but diagnosis with specificity requires biopsy.


Fig. 102-1 B

Miscellaneous benign neoplasms: Apocrine papillated cystadenoma is benign by virtue of its symmetry, sharp circumscription, and uniform hue, but diagnosis with specificity requires biopsy.


Fig. 102-2 A

Miscellaneous benign neoplasms: Pilomatricoma. The redness is a reflection of a foreign body granulomatous reaction consequent to rupture of the benign cystic neoplasm.


Fig. 102-2 B

Miscellaneous benign neoplasms: Pilomatricoma. The redness is a reflection of a foreign body granulomatous reaction consequent to rupture of the benign cystic neoplasm.


Fig. 102-3

Miscellaneous benign neoplasms: A papule of pilomatricoma, a benign cystic neoplasm, is made up early of matrical cells mostly and years later of cornified “shadow cells” entirely, the latter being a flawed attempt at formation of cells of hair shaft from cells of the matrix.


Fig. 102-4

Miscellaneous benign neoplasms: A papule of pilomatricoma, a benign cystic neoplasm, is symmetrical and sharply circumscribed, uniformly colored, and dome-shaped.


Fig. 102-5

Miscellaneous benign neoplasms: This pilomatricoma resembles a cyst and, in fact, it is a benign cystic neoplasm.


Fig. 102-6 A

Miscellaneous benign neoplasms: This poroma can be told to be benign because of its symmetry and rather sharp circumscription. As so often is the case for poroma, it resembles apyogenic granuloma clinically.


Fig. 102-6 B

Miscellaneous benign neoplasms: This poroma can be told to be benign because of its symmetry and rather sharp circumscription. As so often is the case for poroma, it resembles apyogenic granuloma clinically.


Fig. 102-7 A

Miscellaneous benign neoplasms: A spiradenoma cannot be diagnosed with specificity clinically, but can be told to be benign by virtue of its silhouette. The pigmented macule below it is a solar lentigo and the scaly pigmented macule to the right of it is a solar keratosis.


Fig. 102-7 B

Miscellaneous benign neoplasms: A spiradenoma cannot be diagnosed with specificity clinically, but can be told to be benign by virtue of its silhouette. The pigmented macule below it is a solar lentigo and the scaly pigmented macule to the right of it is a solar keratosis.


Fig. 102-8 A

Miscellaneous benign neoplasms: This spiradenoma could be misinterpreted clinically as a follicular cyst of the isthmic-catagen type. Palpation resolves that issue and biopsy enables diagnosis with specificity.


Fig. 102-8 B

Miscellaneous benign neoplasms: This spiradenoma could be misinterpreted clinically as a follicular cyst of the isthmic-catagen type. Palpation resolves that issue and biopsy enables diagnosis with specificity.


Fig. 102-9

Miscellaneous benign neoplasms: This large spiradenoma cannot be diagnosed with precision by examination grossly alone. Biopsy enables resolution of the matter.


Fig. 102-10

Miscellaneous benign neoplasms: Syringocystadenoma papilliferum may develop independent of a nevus sebaceus, as is the case here.


Fig. 102-11

Miscellaneous benign neoplasms: Trichoblastoma is the benign analogue of trichoblastic (basal-cell) carcinoma, it being a neoplasm of germinative cells like those in an embryo that give rise to the entire folliculosebaceous-apocrine unit.


Fig. 102-12

Miscellaneous benign neoplasms: Familial trichoepitheliomas (trichoepitheliomatous trichoblastomas) are skin-colored, smooth-surfaced papules that tend to cluster.


Fig. 102-13 A

Miscellaneous benign neoplasms: Familial trichoepitheliomas (trichoepitheliomatous trichoblastomas) present themselves as smooth-surfaced papules of different sizes and with a tendency to become confluent.


Fig. 102-13 B

Miscellaneous benign neoplasms: Familial trichoepitheliomas (trichoepitheliomatous trichoblastomas) present themselves as smooth-surfaced papules of different sizes and with a tendency to become confluent.


Fig. 102-14 A

Miscellaneous benign neoplasms: Beneath the right eye is a papule with a central dell typical of desmoplastic trichoepithelioma. The pigmented papules are Miescher’s nevi.


Fig. 102-14 B

Miscellaneous benign neoplasms: Beneath the right eye is a papule with a central dell typical of desmoplastic trichoepithelioma. The pigmented papules are Miescher’s nevi.


Fig. 102-15 A

Miscellaneous benign neoplasms: A shiny smooth-surfaced delled papule of trichofolliculoma. Long, light-colored, silken hairs often emerge from the dilated infundibular ostium in the center of the papule.


Fig. 102-15 B

Miscellaneous benign neoplasms: A shiny smooth-surfaced delled papule of trichofolliculoma. Long, light-colored, silken hairs often emerge from the dilated infundibular ostium in the center of the papule.


Fig. 102-16 A

Miscellaneous benign neoplasms: Apocrine mixed tumor often is thought clinically to be a cyst and, not uncommonly, a surgeon first cuts into it; when no contents emanate, it is excised.


Fig. 102-16 B

Miscellaneous benign neoplasms: Apocrine mixed tumor often is thought clinically to be a cyst and, not uncommonly, a surgeon first cuts into it; when no contents emanate, it is excised.


Fig. 102-17

Miscellaneous benign neoplasms: This microcystic adnexal carcinoma easily could be misinterpreted clinically as adesmoplastic trichoepithelioma, this particular carcinoma also being a papule punctuated by a dell.