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Differential Diagnosis for Pain Under the Left Breast in Pregnancy

Single Most Likely Diagnosis

  • Costochondritis: This condition, also known as Tietze's syndrome, is characterized by inflammation of the cartilage that connects the ribs to the breastbone. It is a common cause of chest pain and can be exacerbated by the physical changes of pregnancy, such as increased breast size and rib cage expansion.

Other Likely Diagnoses

  • Musculoskeletal strain: The growing uterus and changes in posture during pregnancy can put strain on the muscles and joints of the chest wall, leading to pain under the left breast.
  • Gastroesophageal reflux disease (GERD): Pregnancy can exacerbate GERD symptoms, which may include chest pain or discomfort under the breast.
  • Breast tenderness: Hormonal changes during pregnancy can cause breast tenderness or pain, which may be localized under the left breast.

Do Not Miss Diagnoses

  • Pulmonary embolism: Although less common, pulmonary embolism is a life-threatening condition that requires immediate attention. Pregnancy increases the risk of blood clots, and chest pain can be a symptom.
  • Myocardial infarction: Heart attack is rare in pregnant women but can occur. Chest pain, including pain under the left breast, is a key symptom that should not be missed.
  • Pneumonia: Infection in the lung can cause chest pain and should be considered, especially if accompanied by fever, cough, or shortness of breath.

Rare Diagnoses

  • Precordial catch syndrome: A benign condition characterized by sharp, stabbing chest pain that can occur at rest and may be related to the musculoskeletal system.
  • Sickle cell crisis: In women with sickle cell disease, a crisis can cause severe pain, including chest pain, due to vaso-occlusion.
  • Herpes zoster (shingles): Reactivation of the varicella-zoster virus can cause a painful rash, which, if localized to the chest area, might cause pain under the left breast.

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Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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