Fig. 12.1 Trichilemmal carcinoma. Flesh-colored nodule on the upper lip Pathology This neoplasm has been shown to exhibit outer root sheath differentiation and is considered to be a malignant form…

Fig. 24.1 (a) A nodular cyst-like proliferation with papillary projections infiltrating the dermis. (b) Papillary projections with tubular structures lined by cuboidal or columnar epithelium. (c) The glandular differentiation Fig….

Fig. 29.1 Low-grade fibromyxoid sarcoma. Histological appearance with spindle and stellate-shaped cells, in a whorled or linear arrangement, and with collagenized and myxoid areas Fig. 29.2 Low-grade fibromyxoid sarcoma. Collagenized…

Fig. 17.1 Primary cutaneous adenoid cystic carcinoma. There are nests and islands of cytologically monotonous cells with cribriform architecture Fig. 17.2 Primary cutaneous adenoid cystic carcinoma. In areas, the growth…

Fig. 1.1 A keratotic nodule with erythematous halo on the scalp of an old patient Pathology Histologically, the tumor is composed of cords and nests of atypical keratinocytes with an…

Fig. 11.1 Malignant proliferating trichilemmal tumor. A single hard, slow-growing nodular swelling 3 × 3 cm on the scalp. The lesion relapsed one year after excision Pathology The diagnosis of malignancy in…

Fig. 28.1 Endocrine mucin-producing sweat gland carcinoma. Multiple solid lobules showing areas of cribriform architecture, duct-like structures, and extracellular mucin production To diagnose EMPSGC, the expression of specific neuroendocrine markers…

Fig. 27.1 Primary mucinous carcinoma of the skin. A dermal tumor consisting of small islands of epithelial tumor cells “floating” in large pools of slightly basophilic mucin separated by thin…

Fig. 4.1 Adenosquamous carcinoma. An erythematous nodule with erosive surface on the upper arm Pathology ASC is a biphasic tumor with an epithelial malignant component of conventional SCC, merging with…

Fig. 10.1 Trichoblastic carcinoma. A large, asymmetrical lesion composed of basaloid islands with central comedo-type necrosis is adjacent to more typical-appearing trichoblastoma Fig. 10.2 Trichoblastic carcinoma. A deep, infiltrative, basaloid…