Carcinoma erysipeloides is an uncommon form of cutaneous metastasis in which malignant cells spread to the skin via superficial dermal lymphatic vessels.1
Carcinoma erysipeloides presents as a patch of thickened, red skin resembling cellulitis. Although usually tender, it can be asymptomatic and does not cause fever. Carcinoma erysipeloides is most commonly found on the chest. It may appear within a scar, involve an arm, or uncommonly, the head and neck region. In cases of breast cancer, the other breast may become involved. 2
The edge of a patch of carcinoma erysipeloides may be distinctly raised, red and swollen due to tumour cells blocking the lymphatic vessels and the release of cytokines.3
Carcinoma erysipeloides tends to occurs near the primary tumour. Signs that the cancer has spread to the skin include:
Most cases of carcinoma erysipeloides are due to underlying adenocarcinoma, most commonly adenocarcinoma of the breast.4 It has also been described with melanoma, and tumours of the parotid gland, thyroid, larynx, lung, fallopian tube, cervix, ovary, colony, prostate, pancreas and stomach.4-5 Rarely it can be the first sign of the tumour.4
Carcinoma erysipeloides usually appears after chemotherapy, radiotherapy or surgery to remove the tumour and/or local lymph nodes. It is thought that these treatments may lead to shedding of the tumor cells through the lymphatics.6
The diagnosis of carcinoma erysipeloides can be difficult. Delay in diagnosis is common, because it may resemble infection (cellulitis/erysipelas) or radiation dermatitis.7
A punch biopsy of affected skin is required to confirm the diagnosis. Histopathology of carcinoma erysipeloides shows malignant cells within the cutaneous lymphatics.
It is not possible to remove carcinoma erysipeloides by surgery. Palliative treatment with chemo-radiotherapy may cause regression.9 The prognosis of a patient with carcinoma erysipeloides is generally poor.
