I just wanted to check if Histiocytoma when first appearing can not be red as shown in the picture below ? And if they are known for ulcerating the next day ? Also can a mast cell tumour do both those thing also ? I edited the lighting of the picture so it stand out more. I also added a picture of what it looked like a week later after the scab got knocked off and a picture closer to what it look like now. My dog a staffy aged 8.

I noticed a raised lump on my Staffordshire bull terrier aged 8 on the 21st of November on my dog head that ulcerated the next day. The ulcerated lump scabed over then got knocked off the following week. I have been to 2 different vets within that time and both feel it either a histiocytoma or a mast cell tumour with both vets leaning toward it being a histiocytoma but only a biopsy will make sure. I have a biopsy for Wednesday but my question is would it be worth doing is this lump too close to the eyes for good margins? I have done days of googling and I see 1cm is all that needed for good margins and 90% of other sites saying 2-3cm is needed. I would not put my dog through radio therapy so if good margins is not possible would it be worth doing a biopsy? Another thing is I know it low chance but I don’t want to risk Anesthesia with my dog being that 1 in 2000 dog to die from it. Anyone know if good margins is possible from looking at the picture of my dog?

I noticed last Friday a faint circle on my dog head between his eyes the following day it opened up and they was a circle of blood. I took my dog the vet on Monday and was given cream that I applied till Friday yesterday morning. Yesterday the scab came off and they was a small red circle not sure if they was any bleeding. The 4th picture show what it look like today. Can this be cancer? As I don’t understand if cancer develope a scab ? If it was just a bump that opened up and a scab formed for it to heal then should it not be showing a fleshy circle still ? How long does it usally take for this type of thing to heal? I have spent days looking at picture of cancer and they are all lump that bleed and I ain’t seen a picture of a scab forming over any. I asked my vet on Monday after she checked it out if it could be cancer and she said it could be but if it was just a scab would she not know ? Or can cancer form scabs?

I noticed last Friday an outline of a circle on my dog head that you can to look for a certain angle to see. The next day you could see it more and it open up and was bleeding. I took my dog to the vets on Monday and asked if it could be cancer and was told it could be then given betafuse that I applied twice a day till today, the cream done nothing. The growth itself I don’t think has grown outwards but I think it grown a bit upwards. His been acting less energetic lately it mite be due to him getting older as his close to 8 he only seem full of energy when it come to walks or play but he just seem a bit of off less up for going up the stairs. His also got a small lump on his side and neck tho they ain’t the size of this lump.