... to avoid confusion with melanoma. While miscellaneous findings have been reported in relationship to anatomic site, it is often difficult to determine whether some features, such as pagetoid spread of melanocytes, are determined by the site-specific microanatomy of the skin, such as volar skin, or other...

... of malignancy. Blue Melanoma versus Miscellaneous Pigment-Synthesizing Tumors. Blue nevus-like melanoma may also be confused with a range of pigmented benign, “borderline,” or malignant melanocytic neoplasms, such as proliferative nodules, PEM, or miscellaneous tumors in the spectrum of “pigment-synthesizing...

... growth   Cellular and/or proliferative nodule associated with a melanocytic nevus  Superficial spreading or lentiginous melanoma with invasive nodular growth  Miscellaneous melanoma variants with nodular growth   Melanoma arising in association with a blue nevus   Deep penetrating nevus...

... versus Dysplastic Nevus or Other Nevi with Pagetoid Melanocytes. A common diagnostic challenge is the distinction of SMM from dysplastic nevi or miscellaneous nevi with pagetoid spread ( 3 , 7 ). This distinction can be difficult and subjective due to microscopic overlap, especially on a partial biopsy...

... inhibitors. DIFFERENTIAL DIAGNOSIS Melanoma metastatic to the skin can be confused with a primary melanocytic tumor as well as miscellaneous primary and metastatic nonmelanocytic neoplasms. Metastatic Melanoma Versus Primary Melanoma. The distinction between a primary and metastatic tumor is important...

... ). TERT promoter mutations are also less common in acral melanomas, but TERT aberrations (mutations, deletions, amplifications, translocations) are seen in up to 40 percent of tumors ( 30 ). Miscellaneous other mutations or aberrations have been reported, including, but not limited to, HRAS...

... population is a feature of “biochemical” maturation. Miscellaneous findings commonly seen in acquired nevi include neurotization ( fig. 3-10 ), fatty metaplasia ( fig. 3-11 ), and pseudovascular changes ( fig. 3-12 ) ( 14 ). Additional features that may be seen include variable degrees of edema ( fig. 3-13...

... pathologists to propose miscellaneous subtypes of BN (e.g., amelanotic, sclerosing, epithelioid). The term cellular BN is used for more cellular lesions usually composed predominantly of plumper ovoid cells rather than the dendritic melanocytes of “common” blue nevi ( 1 , 2 , 18 – 21 ). Classic common...

...-neoplastic, are discussed ( Table 14-1 ). Table 14-1 THE 2020 WHO CLASSIFICATION OF OTHER CARCINOMAS, MISCELLANEOUS TUMORS, AND TUMOR-LIKE CONDITIONS OF THE OVARY ^a Other Carcinomas  Mesonephric-like carcinoma  Undifferentiated and dedifferentiated carcinomas of the ovary...

... of the information in this chapter represents a snapshot or an impressionistic view of ovarian cancers in general. The World Health Organization (WHO) classifies ovarian tumors into these categories: epithelial, mesenchymal, mixed epithelial and mesenchymal, sex cord-stromal, germ cell, miscellaneous, tumor-like...

... tumors . Cancer   1971 ; 27 : 687 - 93 . 13. Kempson   RL , Hendrickson   MR . Miscellaneous types of surface epithelial neoplasms. The well-differentiated end of the morphologic spectrum of endometrioid, clear-cell, and Brenner tumors and mixed epithelioid tumors of low malignant...

.... Miscellaneous Tumors The following tumors have been described in or adjacent to the fallopian tube: schwannoma ( 186 ), angiomyolipoma ( 187 ), lipoma ( 188 ), chondroma ( 189 – 191 ), hemangioma ( 192 ), rhabdomyosarcoma ( 193 – 195 ), liposarcoma ( 196 ), synovial sarcoma ( 197 ), gastrointestinal stromal...

... Inflammatory Myofibroblastic Tumor NONEPITHELIAL NEOPLASMS OF UNCERTAIN MALIGNANT POTENTIAL Gastrointestinal Stromal Tumor MISCELLANEOUS RARE NONEPITHELIAL NEOPLASMS Paraganglioma Hematolymphoid Neoplasms MALIGNANT NONEPITHELIAL NEOPLASMS Sarcomas Fibromatosis (Desmoid Tumor) Solitary Fibrous Tumor...

.... Other sarcoma types   2. Hematolymphoid neoplasms    a. Lymphoma    b. Myeloid sarcoma  D. Miscellaneous nonepithelial neoplasms   1. Mature cystic teratoma   2. Mesothelial neoplasms    a. Adenomatoid tumor    b. Malignant mesothelioma   3. Paraganglioma III. Secondary...

... with hyperinsulinemic hypoglycemia after gastric bypass surgery . Islets   2018 ; 10 : 213 - 20 . SOLID NON-NEOPLASTIC LESIONS OF THE EXOCRINE PANCREAS Chronic Pancreatitis Simple Mucinous Cyst Retention Cyst NON-NEOPLASTIC CYSTIC LESIONS OF THE EXOCRINE PANCREAS Pseudocyst Miscellaneous Solid Lesions Hamartoma...

...   Other epithelial tumors    Mixed tumour    Adenocarcinoma of Skene gland origin    Adenosquamous carcinoma    Adenoid basal carcinoma  Mixed epithelial and mesenchymal tumors    Adenosarcoma  Miscellaneous tumors    Germ cell tumors Tumors of the Vulva  Epithelial tumors...

... appearing tumors harboring the same fusion have been reported in bone, kidney, and other genital soft tissues ( 202 ). MISCELLANEOUS TUMORS Melanoma In the English literature, melanomas of the vagina and the vulva are often described together; to this end, the reader is referred to the coverage...

... at cervical tumors, age, tumor size, and positive margin status were associated with lower survival ( 288 ). MISCELLANEOUS TUMORS Benign Melanocytic Lesions Benign pigmented lesions of the cervix encompass entities more typically encountered in cutaneous skin and include, in order of frequency, blue nevus...

... in varying proportions. Although one study suggested that cervical squamous cell carcinoma is more typically located in the dermis without epidermal involvement ( 466 ), this finding was not replicated in a subsequent study ( 468 ). MISCELLANEOUS LESIONS Primary Vulvar Lymphoma Primary lymphomas...

..., and in such cases, microscopic findings are discriminatory (see Hydrocele-Related Changes and Miscellaneous Other Abnormalities of the Tunica Vaginalis in chapter 11 ). On microscopic examination, mesothelial hyperplasia does not exhibit the complex, arborizing, papillary, fibrous stalks of papillary mesotheliomas...