Esophageal webs are seen associated in 50% of patients with this condition. Rarer forms of cervical esophageal diverticula are the Killians diverticulum and the Laimers diverticulum. Killians diverticulum is formed in the Killian-Jamiseon triangle (located inferior to the cricopharyngeus on both sides of this muscles insertion into the cricoid cartilage). Laimers diverticulum is formed in Laimers triangle (located inferior to the cricopharyngeus in the posterior midline above the confluence of the longitudinal layer of esophageal muscle). Laimers triangle is covered only by the circular layer of esophageal muscle. Diagnosis
A combination of the simple barium swallow and a  thorough endoscopy will normally confirm the diverticulum. Treatment
If small and asymptomatic, no treatment is necessary. Larger, symptomatic cases of Zenkers diverticulum have been traditionally treated by neck surgery to resect the diverticulum and incise the cricopharyngeus muscle. However, in recent times non-surgical endoscopic techniques have gained more importance (as they allow for much faster recovery), and the currently preferred treatment is endoscopic stapling (i.e. diverticulotomy with staples ). This may be performed through a diverticuloscope. Other methods include fibreoptic diverticular repair.Other non-surgical treatment modalities also exist, such as endoscopic laser, which recent evidence suggests is less effective than stapling. Epidemiology
Zenkers diverticulum mainly affects older adults. It has an incidence of 2 per 100,000 per year in the UK, but there is significant geographical variation around the world. References
External links

Zenkers diverticulum at eMedicine
Nevi appeared in one half the subjects before the age of 10, and between ages 10 and 20 in the rest. In one quarter of cases sun exposure seems to have played a role, a number apparently lower than that expected by researchers. Also surprising to researchers was the low incidence (32%) of Beckers nevi above the nipples, for it had generally been believed that the upper chest and shoulder area was the predominant site of occurrence. Pigmentation was light brown in 75% of cases (note: subjects were Caucasian), and average size of the nevus was 125 cm2 (19 in2). Malignancy
A 1991 report documented the cases of nine patients with both Beckers nevus and malignant melanoma. Of the nine melanomas, five were in the same body area as the Beckers nevus, with only one occurring within the nevus itself. As this was apparently the first documented co-occurrence of the two diseases, there is so far no evidence of higher malignancy rates in Beckers nevi versus normal skin. Nonetheless, as with any abnormal skin growth, the nevus should be monitored regularly and any sudden changes in appearance brought to the attention of ones doctor. Treatment
As Beckers nevus is considered a benign lesion, treatment is generally not necessary except for cosmetic purposes. Shaving or trimming can be effective in removing unwanted hair, while electrology or laser hair removal may offer a longer-lasting solution.