According to the classification of World Health Organization, primary adenocarcinomas of the sinonasal tract can be initially classified as salivary and non-salivary types. The latter are further divided into intestinal and non-intestinal types. Sinonasal intestinal-type adenocarcinoma(ITAC) is rare adenocarcinoma subtype, which is closely occupational exposure to hardwood dusts, leather. In this study, we present a case of ITAC in a 68-year-old man. We successfully treated with wide excision and soft tissue reconstruction with free anterolateral thigh flap.

Mucinous adenocarcinoma (MAC) refers to a malignant neoplasm that belongs to a subtype of adenocarcinoma which produces mucin. The World Health Organization has classified MAC as a tumor of salivary gland origin and it is extremely rare. Therefore, its characteristics are not well-known. This study reports a case of MAC of minor salivary gland origin, which occurred in the oral commissure of an 82-year-old female patient, and a systematic review on existing cases of MAC of salivary origin. Based on the study’s findings, it is safe to assume that the occurrence of lymph node metastasis is an important factor in determining the prognosis of patients with MAC.

Primary adenocarcinoma is a rare neoplasm of the urinary bladder, constituting approximately 2.5% of all primary bladder malignancies. Signet ring cell variant is even rarer, constituting approximately 0.5% to 2.0% of all primary carcinoma of the urinary bladder. However, glandular differentiation in the urinary bladder is relatively more common than primary adenocarcinoma of the urinary bladder. Therefore, diagnosis of primary adenocarcinoma of the urinary bladder can be very challenging, but of significant clinical importance. We report on a case of adenocarcinoma with mucinous and signet ring cell differentiation in the bladder dome in a 49-year-old female.