Introduction:

This case aims to enhance the understanding of the physiology and pathology of the menstrual cycle and to develop skills in the diagnosis and management of abnormal uterine bleeding.

Case Profile: 

A 47-year-old G2P0020 woman, LMP 22 days ago, is experiencing heavy menstrual bleeding. Her cycles were regularly occurring every 29-31 days and lasting 6 days, with manageable cramps relieved by Ibuprofen until 6 months ago. Lately, her menses occur every 24-33 days, lasting 7-10 days, associated with cramps not eased by Ibuprofen, clot passage, and she is using about two boxes of pads per cycle. She fears losing her job if the bleeding doesn't improve. She denies dizziness but feels weak and fatigued. She reports no change in weight over the past year. There are no known family histories of bleeding disorders or reproductive cancers. She uses condoms for contraception, takes no daily medications, and has no other known medical conditions. She is married and works as a factory worker. 

On a physical exam, her weight is 155 pounds, her height is 5 feet, 7 inches, and her BP is 130/85, P 98. She looks pale. A pelvic exam shows a normal vulva, vagina, and cervix; a normal-sized, non-tender, mobile uterus; and a non-tender adnexa without palpable masses.

Activity Questions:

• What defines a normal menstrual cycle? 
  Hint: Reflect on the average cycle length, bleeding duration, volume, and composition.
  

• Describe the normal endocrinological and physiological events of the menstrual cycle.
  Hint: Consider the different phases of the menstrual cycle and the hormonal changes that occur within.

• How is abnormal uterine bleeding defined? 
  Hint: Think about the variations in cycle length, volume, or duration that would define abnormal bleeding.
  

• What could be the potential causes of this patient's bleeding? 
  Hint: Use the PALM-COEIN classification to explore the possible etiologies.
  

• What are the potential etiologies of ovulatory dysfunction? 
  Hint: Consider conditions that can cause hormonal imbalances leading to ovulatory dysfunction.
  

• Explain the mechanism of anovulatory bleeding. 
  Hint: Discuss the role of progesterone in menstrual cycle regulation.
  

• How can you determine if this patient is having ovulatory cycles? 
  Hint: Think about the patient's history, laboratory tests, and physical signs that might indicate ovulatory cycles.
  

• What are the appropriate lab tests to order for this patient? 
  Hint: Consider the basic tests needed to assess her condition.
  

• What further tests would you order based on the following results: Hgb: 9.2, HCT: 28%, HCG: negative, TSH and Prolactin: normal, Endometrial biopsy: normal secretory endometrium, Pelvic ultrasound: normal-sized uterus with heterogeneous myometrium, endometrial lining 1.5 cm and irregular - consistent with an endometrial polyp, normal ovaries. 
  Hint: Think about the additional diagnostic procedures needed to confirm the suspected diagnosis.
  

• Describe potential treatment options for this patient.
  Hint: Consider both medical and surgical treatment options relevant to the patient's condition and possible diagnosis.

• What are important considerations when counseling the patient and helping her choose the best option? 
  Hint: Reflect on the patient's fertility desires, the effectiveness and permanence of treatment options, operative risks, and the time to expect menopause.
  

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