My professor did not cite my article in a review on the same topic I was surprised to see a review on a topic where I have published an original article, where my article was not cited. My surprise was even bigger because this review was issued from the same department where my original article was issued and it was concerning the same topic. The first author was somebody I don't know personally, but the corresponding author is my professor, who was also a co-author in my original article. I must also say that my original article has many international citations, and it saddened me a lot to realize that my own department and my own professor, forgot to cite my (their) own published work.

I emailed my professor the fact that I felt forgotten and that this was not academically correct but the answer I received did not make things better. He said that


  many other articles aren't included, because this review was covering
  many topics and that the main topic was "A". The part of the topic B
  (my topic) was not included in the aim of the review but was asked by
  a reviewer so it was added later.


But I'm not happy with this answer, because the topic B is even included in the main title of the review. But even the topic A could be enough for a citation of my original article. Later he said that in a review article they can cite only the recent 2 years original articles and that he was not obliged to cite my (our) original article.

I have obtained my PhD from this department, 5 years ago, and my original article was published 5 years ago. The review was published last month. 

Do you believe that this was academically correct?
Agreeing with @PeteL.Clark: define precisely what you want as outcome of the interaction, and act following this outcome. 

My experience of priority issues and fighting "not being cited" that, unless your work is so promising that a priority/citation fight warrants all-out war to gain or not lose visibility, the loss of concord is usually not worth it; as unfair as that may seem, the one complaining about being ignored is often seen as the one "disturbing the peace". It shouldn't be like that, but this is an empirical observation I made, even in blatant cases of intentional ignoring. Maybe it has something to do that quite a few times it's the ones with the most aggressive "nostrification" tendency who battle the issue of being ignored in the most forceful manner.

Now, there are indeed cases where all-out priority wars may be war-ranted (pun intended) to ensure that one is at least etched in the community's minds, but keep in mind, even then, the outcome is all but assured. 

Lots of unfairness happens, to all of us, but it is usually the long-term that counts. Given that your old article attracted a lot of citations, you probably are better off just ignoring the matter, but only you can judge whether entering the war-ring (yes, pun intended again) as response to your latest slight is worth it.