Disease, BER or Pest? I really can't tell

[TNTiger]

Attached are several pictures of a tomato with some sort of internal rot. I have no idea what this is and whether there is something I should be doing about it (other than getting rid of the tomato itself!).

The outside of the tomato looked fine until the day (or so) before picked. I've seen several like this now from at least 2 different plants. I'm not seeing any evidence of insects on these and the plant seem to be doing ok in general. Fortunately, I'm getting far more good tomatoes than rotted ones like this but I'm seeing enough to be concerned.

Any ideas what I've got here? Thanks!!

[TNTiger]

Anyone?

[RayR]

Possible internal BER or they got infected with an opportunistic fungus or bacteria that entered though a tiny crack or insect puncture. My best guess would be BER which doesn't always show at the blossom end.

[Paradajz]

BER damage is dry, and with tomatoes it is primary located on the fuit parts oposite to the stem. the absence of calcium results in clear visual deformations of the fruit tissue ( cell walls break ), consequent sunken/shrinken areas appear, etc.
those are basic common tell- tell symptoms, out of which you have none.

as for the exact cause of the problem you got there, photos of the plants and fruits would help much more than a simple photo of the troublesome internal fruit areas.
apearance of the symptoms at the spot where the fruit is connected to the branch suggests some of the rots ( fungal or bacterial, with slightly larger chances for fungals, one of the various phytophtora rots especially ), but plenty kinds of mold could also cause this.
were those fruits close to the soil level, or directly touching anything ( pressed to stems, stakes, cage, etc. )?

br,
ivan

[TNTiger]

Some of the fruits were under a bunch of leaves - the plants got really tall and finally flopped over and at least one like this was on the "inside" of the plant mass.

These particular plants still look pretty healthy . . . green with very little evidence of funguus or insect damage. Others are in my garden are suffering from the late season yellowing that seems to always occur in this area (I think Septoria but I'm not sure).