Key words: Rectal adenocarcinoma; Inflammatory cutaneous metastasis] Melis M, Scintu F, Marongiu L, Mascia R, Frau G, Casula G. Inflammatory cutaneous metastasis from rectal adenocarcinoma: report of a case. Dis Colon Rectum 2002;45:562-563.C utaneous metastases occur in fewer than 4 percent of patients with colorectal adenocarcinoma. 1 Inflammatory cutaneous metastasis (ICM) is a rare subset of neoplastic disease, most often seen in patients with breast cancer, that usually presents clinically as a zone of pink, deep-red, or purplish-red indurated erythema with a well-demarcated border. 2 We recently observed a case of ICM that originated from a rectal cancer.
REPORT OF A CASEA previously healthy 41-year-old male was referred to our department for a rectal adenocarcinoma that invaded the anal sphincter. Computed tomographic scan and endorectal ultrasound showed infiltration of the prostate and multiple metastases in both hepatic lobes; the patient underwent neoadjuvant chemoradiotherapy. A few weeks after completion of treatment, he developed an erythematous, well-demarcated eruption over the anterior pelvic region and the perineum. The eruption rapidly formed confluent erythematous plaques that were associated with pain and severe edema of scrotum, penis, and perineum (Fig. 1). Lymphedema of the lower extremities was not present; enlarged lymph nodes were palpable in both groins. Imaging did not reveal further dissemination of the disease, compared with the previous staging; specifically, no direct extension of the primary tumor to the abdominal or pelvic wall was noted. Biopsies of the skin showed metastasis of adenocarcinoma, with widespread dermal invasion and tumor cells plugging both lymphatic and vascular vessels. In the absence of tumor-related complications, we thought that surgery would be of no benefit to the patient in terms of survival and quality of life, and for this reason, he did not undergo surgery.
DISCUSSIONCutaneous metastases very seldom present as erythematous, warm, well-demarcated and indurated