Hi Susie,
If after taking Mark's suggestion you find that he is getting enough calories and protein to sustain his weight, you might want to have his thyroid checked. If not fucntioning at whatever 'his normal' levels are, this can cause fatigue and weight loss, amongst many other things. Make certain they run a full thyroid panel and check his TSH levels from before he had the rads.

Take care,
Eileen


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Aug 1997 unknown primary, Stage III
mets to 1 lymph node in neck; rt ND, 36 XRT rad
Aug 2001 tiny tumor on larynx, Stage I total laryngectomy; left ND
June 5, 2010 dx early stage breast cancer
June 9, 2011 SCC 1.5 cm hypo pharynx, 70% P-16 positive, no mets, Stage I