Help with a diagnosis

Hello. I have had a reoccurring rash on my knees for over 5 years. It always comes back to exactly the same spots then spreads to cover the knees. This summer, the rash appeared on the soles of my feet which made walking normal pretty much impossible so I finally went to the doctor. The PAC took one look at my knees and said psoriasis. He biopsied just for confirmation. I will see my own doctor next month and am not sure what this diagnosis means:
FINAL DIAGNOSIS:
SKIN, RIGHT KNEE LATERAL, PUNCH BIOPSY:- SPONGIOTIC AND PSORIASIFORM DERMATITIS- SEE COMMENT
COMMENT
The histological findings show chronic spongiotic (eczematous) dermatitis. There are features of psoriasiform
hyperplasia and neutrophilic abscess, therefore a very early presentation / evolving psoriasis remains a
differential consideration. PAS is negative for fungal organisms. Clinical correlation is advised.

He left a phone message stating it was a form of psoriasis caused by something environmental.

So this means I do not have psoriasis? Web says psoriasis can cause psoriasiform dermatitis? Has anyone else had similar pathology?

Asking as my mother had psoriatic arthritis without the rashes.
____________________________________________________________________