Related Experiment Video
Updated: May 19, 2026

Demonstration of Cutaneous Allodynia in Association with Chronic Pelvic Pain
Published on: June 23, 2009
Unknown: a warm, painful nodule on the back
Joyce Imuwahen Imahiyerobo-Ip1, David Wartman, Jeoffrey Brennick
1Section of Dermatology, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, USA.
Abstract:
A 67-year-old man presented with a complaint of a painful nodule on his back for approximately two months. On exam, a violaceous, firm, warm, indurated nodule measuring 3.5 x 2 cm was observed. Nine months prior to presentation, he was diagnosed with a moderately differentiated squamous cell carcinoma (SCC) of the left upper lobe (stage 1b), which was removed via video-assisted thoracoscopic wedge resection. Diagnosis of metastatic SCC secondary to traumatic seeding at a trocar port site was made. To our knowledge, this has not been previously described in the literature.
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