Kaposi sarcoma

Kaposi's sarcoma (KS) is a type of cancer that can form masses in the skin, lymph nodes, or other organs. The skin lesions are usually purple in color. [Source: Wikipedia ]

OrphaNet reference
Kaposi sarcoma 
May Cause
Abdominal lymphadenopathy
Bilateral basilar lung disease
Bulls-eye lesion of gastrointestinal tract
Bulls-eye liver lesion
Colon wall thickening
Diffuse gallbladder wall thickening
Diffuse interstitial lung disease with associated lymphadenopathy
Duodenal wall thickening
Erosion of cortical bone surface
Filling defect in stomach
Gastric fold thickening
Gastric ulceration
Gastrointestinal tract thumbprinting
Hemorrhagic liver lesion
Ill-defined multifocal lung opacities
Intraorbital calcification
Lesions of the hypopharynx, larynx, and upper trachea
Liver lesion with contrast fill-in
Liver neoplasm
Malignant small bowel tumor
Mucosal destruction of small bowel
Multifocal soft-tissue tumor
Multiple duodenal filling defects
Multiple filling defects in colon
Multiple pulmonary nodules
Multiple radiolucent bone lesions
Multiple small bowel filling defects
Multiple solid liver lesions
Peribronchovascular interstitial thickening
Perilymphatic small lung nodules
Polyostotic bone lesions in adults
Postbulbar duodenal ulcer
Pulmonary disease in an immunodeficient patient
Pulmonary hemorrhage
Regional osteoporosis
Retroperitoneal lymphadenopathy
Segmental narrowing of colon
Shaggy lung nodule
Small bowel wall thickening
Soft-tissue mass with adjacent bone erosion
Soft-tissue tumor in a young adult
Soft-tissue tumor in an older adult
Soft-tissue tumor with prominent vascularity
Solid liver lesion in adult
Solitary esophageal filling defect
Solitary filling defect in colon
Solitary intrinsic duodenal mass
Solitary irregular cavitary lung lesion
Solitary small bowel mass with preserved mucosa
Starry-sky liver
Subcutaneous tumor
Tumor-like bone surface lesion
May Be Caused by
HIV infection