Patients with lung cancer may present with respiratory and systemic symptoms. However,
cutaneous metastases from primary lung cancer is a rare phenomenon, especially in women,
that signifies a poor prognosis. This paper reported a case regarding a 71-year-old woman
who was first presented with a cutaneous nodule over the year. Her condition was further
progressed to multiple lesions on the back and abdomen, dyspnoea, haemoptysis and weight
loss. The results of the skin lesion biopsy exhibited metastatic lung adenocarcinoma with
positive immunohistochemistry for thyroid transcription factor 1 (TTF1) and cytokeratin 7 (CK7). Computed tomography (CT) scan was conducted, and it revealed a left upper lobe lung
mass. The patient was subsequently scheduled for additional management, but she had
succumbed to complications of pulmonary embolism before the necessary interventions could
be provided. In this particular case presentation, the biopsy of cutaneous lesions obtained had
revealed an undiagnosed primary malignancy.