Disclaimer and privacy statement

This postdoctoral educational site is intended to be used by practicing surgical pathologists, and by registars in surgical pathology. The information contained is intented for postgraduate teaching and self-study purposes only.

Its content is not suitable for use by non-experts, and should not be used by patients or family members wishing to obtain relevant information from the patient's perspective. To non-professionals, the contents are largely incomprehensible and may even be misunderstood. If you have queries regarding a lesion that was diagnosed as naevus or melanoma, please consult your local physician.

No claims resulting from any problem caused by its use will be accepted. The diagnoses offered on these slides is the diagnosis of the autor of this site, Professor W.J. Mooi, and you may on occasional feel unconvinced, or you may even disagree with some of the proffered diagnoses. Especially in case of subtle distinctions, between some naevoid melanoma variants and benign melanoma simulators, a 100% consensus is impossible, even amongst experts, as systematic studies have revealed (see for instrance: Barnhill RL et al. Hum Pathol. 1999; 30: 513-20; Braun RP et al.  Dermatology. 2012; 224: 51-8.). This does not, in the opinion of the author, detract from their value, from an educational perspective. It does mean that the distinction between some entities may be less that 100% certain in some instances. Indeed, some of the cases contained in this site have been labeled MELTUMP (melanocytic tumour of uncertain malignant potential) or STUMP (Spitz tumour of uncertain malignant potential). The whys and wherefores of this, and the reasons why this is better than a forced diagnosis of either naevus or melanoma on the basis of equivocal histological findings, will be discussed when appropriate, in individual cases.

Since this site is expected to attract a sizeable number of visitors, discussion about the diagnoses with the website author will not be possible, because of time constraints.

The microscopy slides of this website are  specimens removed from real patients. Every measure has been taken to eliminate the possibility that individual slides and case histories are 'recognized' by patients or third parties. To that end, slight changes in patient's age and other details have sometimes been made, especially in case of rare entities, where the chance of fortuitous recognition might be somewhat higher than average. Hoever, the clinical information is always very similar to the true clinical data, in order to avoid misinformation that might be relevant to the pathological evaluation of the case. If you suspect that you have recognized an individual case, chances are very high that you are mistaken, since the numbers of similar cases is always high, in view of the prevalence of the entities discussed in this site.