Primary cutaneous mucinous carcinoma (PCMC) is an uncommon tumor of the sweat gland origin. The occurrence of PCMC is mostly in middle-aged and older patients, with a slight male predominance. Most cases of PCMC arise on the head, with a preference for eyelids. The histogenesis of PCMC, whether eccrine or apocrine, remains controversial. We report a rare case of PCMC with secondary extramammary Paget’s disease in the groin of a 75-year-old man, which favored an apocrine origin. Furthermore, based on a review of the literature, we provide several histologic clues that can be used to differentiate PCMC from metastatic mucinous carcinoma.
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Primary cutaneous mucinous carcinoma of the scalp masquerading as a benign dermatological mass – A case report Fadi Alnehlaoui, Nafad Mohamed Lotfy Elhadidi, Shafik Fwakhrji, Shekhar V. Shikare, Majid Hassan Alhammadi, Salman Yousuf Guraya International Journal of Surgery Case Reports.2024; 114: 109175. CrossRef
Primary cutaneous mucinous carcinoma in a periorbital lesion: two case reports and literature review Jun Woo Kim, Sung Eun Kim Archives of Craniofacial Surgery.2024; 25(2): 90. CrossRef
Primary Cutaneous Mucinous Carcinoma: A Review of the Literature Timothy Freeman, Aaron J. Russell, M. Laurin Council Dermatologic Surgery.2023; 49(12): 1091. CrossRef
A Case of Eccrine Mucinous Carcinoma Involving Scalp Ramsha Saleem, Sachin Vaidya Cureus.2021;[Epub] CrossRef
Breast cancers that present with mucin include mucinous carcinoma and carcinoma with signet ring cell differentiation. The former shows extracellular mucin and the latter shows abundant intracellular mucin. Here, we report a case of breast cancer showing both extracellular mucin and extensive signet ring cell differentiation due to abundant intracellular mucin. Unlike mucinous carcinoma, this case had the features of high-grade nuclear pleomorphism, high mitotic index, estrogen receptor negativity, progesterone receptor negativity, human epidermal growth factor receptor-2 positivity, and ductal type with positivity for E-cadherin. In a case with signet ring cell differentiation, differential diagnosis with metastatic signet ring cell carcinoma of the stomach and colon is essential. In this case, the presence of accompanied ductal carcinoma in situ component and mammaglobin and gross cystic disease fluid protein-15 positivity were findings that suggested the breast as the origin.
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Research on the Histological Features and Pathological Types of Gastric Adenocarcinoma With Mucinous Differentiation Nian-Long Meng, Yang-kun Wang, Hai-Li Wang, Jun-Ling Zhou, Su-nan Wang Frontiers in Medicine.2022;[Epub] CrossRef
Clinicopathologic characteristics of HER2-positive pure mucinous carcinoma of the breast Yunjeong Jang, Hera Jung, Han-Na Kim, Youjeong Seo, Emad Alsharif, Seok Jin Nam, Seok Won Kim, Jeong Eon Lee, Yeon Hee Park, Eun Yoon Cho, Soo Youn Cho Journal of Pathology and Translational Medicine.2020; 54(1): 95. CrossRef
Human Epidermal Growth Factor Receptor 2-positive Mucinous Carcinoma with Signet Ring Cell Differentiation, Which Showed Complete Response after Neoadjuvant Chemotherapy Yunjeong Jang, Eun Yoon Cho, Soo Youn Cho Journal of Breast Cancer.2019; 22(2): 336. CrossRef
Fine needle aspiration(FNA) is an effective tool in diagnosing mammary carcinoma, We experienced 7 cases of histologically confirmed mammary mucinous carcinoma among 3,052 aspirated cases of breast from 1992 to 1996 in Asan Medical Center" The average age of the patient was 48(33-64) years. The mean size of the lesions was 1.6(0.7-3) cm, and they were palpated as well-defined, firm to hard masses. The cytologic features that may be useful in making a FNA diagnosis of mucinous carcinoma of the breast were analysed.
Mucinous background and tumor cell, clusters with occasional single cells were observed in all cases. Among them, two, cases showed abundant scattered single cells, whereas only few single cells were seen in the other two cases. Tumor cells exhibited mild pleomorphism in four cases, and moderate pleomorphism in three cases. Nucleoli tended to be not prominen and are observed in three cases, rarely noted in other three cases and not seen in one. There was microcalcification in four cases(57%). In conclusion, mucinous background and clustered tumor cells showing mild td moderate pleomorphism with characteristic clinical findings allow us to diagnose, mucinous carcinoma of the breast.