Any possible ideas as to what could be the underlying disease or issue?

[aj_20]

14-year-old male, BP 130/82, PULSE 76, RR 16, T 98.4F, 145 lb, 5’11 • Coordination problems • Fatigues quickly • Joint aches • Leg Muscles aches • Growth without muscle gain • Swollen knee joints • Perpetual sore on leg that won’t heal • General malaise • Concentration issues • Past 2-3 months of  knee pain • Heart murmur  • Low level distress • Feeling of general numbness about situations  • Testosterone levels: 4 ng/dL                  • Thryoid Hormone (free T3): 1 pg/mL              • Growth Hormone: 26 ng/mL               General: 14 y.o. tall, thin, Caucasian male, alert and oriented x3 (A&O x3), low level distress.   HEENT (head, eyes, ears, nose, throat): Normocephalic without evidence of trauma, PEERL (Pupils equal and reactive to light), mucous membranes pink and moist.   Neck supple w/out lymphadenopathy (swollen lymph nodes), thyromegaly (goiter or enlarged thyroid) or carotid bruits (noisy carotid pulse).   LUNGS: Clear to auscultation bilaterally throughout (CTA) "I have been feeling really tired and rundown. It has been hard to concentrate on my homework or have the energy to do anything. I feel like, numb, about stuff."      

[Barb135]

Since this is a thyroid disorders forum, we'll try to stick with thyroid function, mostly, but I may ask some questions that could relate to other issues, as well...

What was the reference range for the Free T3, Growth Hormone and Testosterone?  Reference ranges vary from lab to lab and have to come from the patient's own lab report for the best comparison.  

Was Free T3 the only thyroid related hormone that was tested?  What about Free T4, which is the other main thyroid hormone or the pituitary hormone, TSH, which stimulates the thyroid to produce thyroid hormones? Both of those are, typically, tested with Free T3.  If tested, please post their results and reference ranges.  Were there thyroid antibodies tested? If so, which ones and what were the results, with reference ranges?

Has there been a thyroid ultrasound or CT scan?  If so, please provide details of such.

Have there been vitamin/mineral tests performed for such things as Vitamin B-12, Vitamin D3, Ferritin/iron, magnesium, calcium, etc.  If these were tested, please post results with reference ranges.  

What about a Complete Blood Count (CBC) or Complete Metabolic Panel (CMP)?  If tested, was everything within normal ranges?

The symptoms you describe could relate to many conditions, including thyroid conditions, vitamin/mineral deficiencies, other autoimmune conditions,  growth issues, or anxiety of a 14 yr old.