Weird Bump & Weight Check

[Zaphoid]

Chameleon Info:

• Your Chameleon - Male, Ambilobe , 2.5 years
• Handling - Once a week
• Feeding - 3 days on 4 days off (5-8 crickets free range) , gut loaded with potatoes and Orange cubes from Flukers
• Silk worms & Those thick green worms (butter-worms I think) Once a month (2-5 of them)
• Supplements - Multvitimins (rep-Cal) and Exo-terra multi Vitamins
• Watering - Hand spary and water mist system (Humidity at 50-80%), constantly drinking when I mist.
• Fecal Description - Normal
• History -No issues health-wise

Cage Info:

• Cage Type - Made a Custom Cage 1.5'x1.5'x 4', stainless Steel and Plexiglas. Screened top, small vents on the bottom. (Can't use a screen as I wouldn't be able to keep the humidity. The air never seems to stagnate in the cage)
• Lighting - 2 100W heat lamps, 1 UVB lamp. 8am-6pm
• Temperature - 72-92°F, 100°F right at the lights on the top of the cage
• Humidity - 50-80%
• Plants - Yes, 1 money tree.
• Placement - Living Room with 1 fan
• Location - Canada

Current Problem - Pascal's always had this weird little bump underneath his forearms since I got him at 3-4 weeks old. It doesn't bother him if I touch it, he seems to move just fine and the bump its somewhat ridged and rubbery like cartilage. It becomes very visible if he scrunches together. Anyone know what that is? Also Just making sure there are no issues with his health as this is my first cham trying to make sure he is not underweight, dehydrated or developing MBD. I've attached a few photos.

Thanks for the assistance,

 

[ChamLB]

Feeding - 3 days on 4 days off (5-8 crickets free range) , gut loaded with potatoes and Orange cubes from Flukers

I know this isn't what you are asking but you could do a lot better on your gut load. A variety of veggies from the gut load list would be better. Even carrots or sweet potatoes would be an improvement. Save your money and ditch the orange cubes and let them get their moisture from the veggies.
The lump is kind of hard to see because the close ups blurred. If he's always had it it may be a deformity of the bones of his rib cage or an old injury that healed weird. An X-ray might be the only way to be sure. Looks like he gets around well from your pics.

 

[ChamLB]

Supplements - Multvitimins (rep-Cal) and Exo-terra multi Vitamins

Just saw this. You should supplement calcium (without D3 or phosphorus) at nearly every feeding, multivitamin once every 2 weeks, and calcium with D3 once every 2 weeks.

 

[Zaphoid]

Easy fixes just a quick stop at the pet store/supermarket then. And ya, hard to take a picture of the cham when it keeps trying to climb the phone when it gets close. Thanks for the advice.

 

[JacksJill]

This care sheet should help you fine tune your husbandry. https://www.chameleonforums.com/care/caresheets/panther/
You can look at the base of his tail to judge his body condition since they can puff up their body when they want to. If it looks well filled out and no ligaments are prominent then he's near a good weight. Weighing them on a gram scale every month or so is a good way to track their health.