I believe it is most plausible a recurrent bcc rather than seborrheic keratosis

If you want you can send me a clinical and/or dermoscopic image.

If you do not have, wait and see following the patient every 6 months.

Ketty

Both BCC and Seborrheoic keratosis can occur on sun exposed areas of face. From your post, it is not clear whether Seborrheoic keratosis appeared on the top of previously treated BCC or on other area of face. If later is the case, don't worry and electrofulgeration will be curative for this sun-related benign tumor. However, if former is the case, I would like to take another biopsy from the lesion to ensure that the lesion is not a BCC.

It wouldn't be "over' her lesions, and the point is that the biopsy of the suspicious lesion proved to be benign.

In 'white skinned' people (even in others but less commonly unless some predisposing syndromes are there) recurrence of BCC is always possible and regular follow-ups for any suspicious lesions is a must. However in this case the biopsy has proven this lesion to be a seborrheic keratosis; it is not a cause for concern and it can be managed easily. However if the suspicion in favor of malignancy is great from a clinical point of view then the biopsy can be reviewed or a fresh biopsy can be taken. Both the entities can easily be diagnosed clinically and confirmed easily by biopsy.

well, a very common collision tumor is SK with BCC, whereby usually SK occurs first. In your case it might have developed later. Anyhow, there are several questions open: How was the BCC treated 5 years before- with surgery? Where the margins free of the tumor? What was the clinical and dermoscopic aspect of the lesion at current presentation? And, could it be still a collision in which only the SK was biopsied?

sir the earlier lesion was on the right cheek, which was treated with partial excission without any graft ad there was no recurrence on the same spot..seborrheoic keratosis wa sfound over the outer canthus of the left eye. one problem that the lady was facing , photosensitivity, biopsy from the lesion proved to be benign sebborheoic keroatosis, the lesion was excised and patient advised sunscreen protection. we do not have the earlier biopsy report, . can there be recurrence of bcc, in the same spot, or any SK turn into bcc

it is unlikely that a SK turns into BCC or vice versa but they may occur together. In your case a clinical image would be really helpful to understand more about the clinical situation.

with regard to seborrheic keratosis is a benign tumor, I usually send them to treatment with liquid nitrogen, and solving BCC by surgery, and after 5 years of prior cancer treatment, there is little chance of relapse, so it only control the clinical and dermoskopical. best regards.