Lobulated red nodule on right lower back.

With this patient's multiple sebaceous nodules and DNA mismatch mutation on histology, extensive malignancy workup was started. A 60-year-old man with a history of basal cell carcinoma (BCC) on his forehead excised 10 years ago presented to the dermatology clinic with an enlarging red bump on his back for the past few months. To date, computed tomography (CT) revealed a multicystic pancreatic tail lesion and multiple metastatic lesions to the liver, with plans to conduct further colonoscopy and upper gastrointestinal (GI) imaging. [Extracted from the article]