Differential Diagnosis for Recent Onset of Underbag Swelling
- Single most likely diagnosis
- Cellulitis: This is a common cause of swelling, especially if the patient has a history of trauma, insect bites, or skin infections. The recent onset of underbag swelling could be due to bacterial infection of the skin and subcutaneous tissue.
- Other Likely diagnoses
- Lymphedema: This condition is characterized by the abnormal accumulation of protein-rich fluid in the interstitial tissue, leading to swelling. It could be primary (genetic) or secondary (due to surgery, infection, or trauma).
- Deep Vein Thrombosis (DVT): Although less common in the upper extremities, DVT can cause swelling, pain, and warmth in the affected limb.
- Insect bite or sting: Certain insect bites or stings can cause localized swelling, especially if the patient has an allergic reaction.
- Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
- Necrotizing fasciitis: A life-threatening infection that requires prompt medical attention. Although rare, it can cause severe swelling, pain, and skin necrosis.
- Compartment syndrome: A condition that occurs when pressure within the muscle compartments increases, leading to inadequate blood supply and potentially causing permanent damage.
- Septic arthritis: An infection within a joint that can cause swelling, pain, and limited mobility. If left untreated, it can lead to serious complications.
- Rare diagnoses
- Filariasis: A parasitic infection that can cause lymphedema and swelling, typically in tropical regions.
- Sarcoidosis: A systemic disease that can cause swelling and inflammation in various parts of the body, including the skin and lymph nodes.
- Angioedema: A rare condition characterized by the rapid onset of swelling, often affecting the face, lips, and extremities. It can be life-threatening if not treated promptly.