a mom brings in her 16-year-old daughter, with concerns of increasing weight loss. over the past 3 months, her weight went from 60 kg to 55 kg, placing her at the 10th percentile for weight and bmi. she states she is just very conscious of her food choices and wants a regimented exercise routine, as she is training for high school track. she does admit to irregular scant menstrual periods. what constellation of signs and symptoms should you be concerned about in this patient?