Skin involvement from lung cancer is rare, but physicians should understand its significance. We describe two cases of cutaneous metastasis as the presenting sign of small cell lung carcinoma. In both cases, a lung mass was found coincidentally. This paper presents a discussion about the utility of the ultrasound and molecular characterization of this rare histologic variant. Although unusual, an
... [Show full abstract] index of suspiction should be maintained and biopsy performed, particularly for unexplained skin nodules in patients who smoke or who already have a history of lung cancer.