List of cutaneous conditions associated with internal malignancy
This is a list of cutaneous conditions associated with internal malignancy; skin markers of internal cancer. It does not include skin infections associated with cancer or cancers that spread to skin. Some have stronger associations with cancers than others.
| Cutaneous condition | Internal malignancy |
| Erythema gyratum repens | Lung cancer |
| Hypertrichosis lanuginosa acquisita | Lung cancer |
| Paraneoplastic pemphigus | Non-Hodgkin lymphoma Chronic lymphocytic leukemia Castleman's disease Sarcoma Thymoma |
| Tripe palms | Lung cancer |
| Tripe palms with acanthosis nigricans | Stomach cancer |
| Pityriasis rotunda | Hepatocellular carcinoma |
| Migratory thrombophlebitis | Pancreatic adenocarcinoma |
| Leser–Trélat sign | Gastrointestinal adenocarcinoma |
| Acquired ichthyosis | Hodgkin disease |
| Pityriasis rotunda | Hepatocellular carcinoma |
| Paraneoplastic pigmentation | Small cell bronchial carcinoma |
| Acrokeratosis paraneoplastica | Squamous cell carcinoma of the upper respiratory or gastrointestinal tracts |
| Necrolytic migratory erythema | Glucagon secreting pancreatic islet cell adenoma |
| Dermatomyositis | Lung cancer in men, breast and gynaecological tumours in women and colorectal cancers in both sexes |
| Scleroderma‐like skin changes | Carcinoid syndrome |
| Paraneoplastic pemphigus | B‐cell proliferations and thymoma or thymoma‐like neoplasms; specifically Non Hodgkin's lymphoma |
| Dermatitis herpetiformis | Lymphoma |
| Porphyria cutanea tarda and variegate porphyrias | Hepatocellular Carcinoma |
| Erythroderma and exfoliative dermatitis | Mycosis fungoides or Sézary syndrome |
| Pyoderma gangrenosum | Hematological malignancy |
| Sweet syndrome | Hematological malignancy |