Differential Diagnosis for Flesh Colored, Soft, Nontender, Mobile Nodule on Left Knee of 6 Year Old Girl
- Single Most Likely Diagnosis
- Benign fatty tumor (lipoma): This is a common, benign growth of fat cells that can occur anywhere on the body, including the knee. It is typically soft, mobile, and nontender, which matches the description provided.
- Other Likely Diagnoses
- Epidermal inclusion cyst: These are benign cysts that can form when skin cells are trapped beneath the skin surface. They are often flesh-colored, soft, and mobile.
- Dermatofibroma: A benign skin growth that can appear as a firm, flesh-colored nodule. While they can be tender, especially if irritated, they are often nontender and mobile.
- Wart: Certain types of warts, especially those caused by human papillomavirus (HPV), can appear as flesh-colored, soft nodules. However, they are typically more rough in texture and may be tender.
- Do Not Miss Diagnoses
- Rhabdomyosarcoma: Although rare, this is a type of soft tissue cancer that can present as a soft, mobile mass. It's crucial to consider this diagnosis to ensure timely treatment if present.
- Neurofibroma: Part of neurofibromatosis type 1 (NF1), these tumors can be soft and mobile. Early diagnosis of NF1 is important for managing potential complications.
- Rare Diagnoses
- Fibroma: A rare, benign tumor of fibrous tissue that can appear as a soft, mobile nodule.
- Myxoma: A rare, benign tumor of connective tissue that can present similarly to a lipoma but is less common.
- Granuloma: Certain types of granulomas, such as those associated with infections or foreign body reactions, can appear as soft, flesh-colored nodules, although they are less likely in this context.