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Intrathoracic neurogenic tumors arising from chest wall are generally rare tumors. The benign soft tissue tumors may produce compression effect on the chest wall but are generally free. The presence of unusual adherence raises the suspicion of malignancy. Our case report describes the clinical features of a young male who underwent excision of a left posterosuperior chest wall mass with a portion of the fourth rib. Histopathological examination unexpectedly revealed the existence of two different pathologies. The mass was found to be benign schwannoma and the rib showed features of tuberculous osteomyelitis. Inflammatory response and fibrous reaction mimicked the features of malignancy.

The Þ rst HIV-1 marker that appears in blood following infection is HIV-1 RNA and usually the load is in millions of copies/ ml preceding seroconversion. A 24-year-old pregnant woman, gravida 2, parity 1 was tested for HIV as part of antenatal screening. Three samples were collected and tested from this individual over a period 70 days. The HIV-1 RNA level during seroconversion phase was very low contrary to the well understood natural history of HIV infection. The reactivity rate in the ELISA and the Western Blot proÞ le showed a gradual increase over the 70 days with a weak reactivity in a second generation assay (detects IgG only) for the third sample. This case illustrates the uncertainties regarding the serological window period in HIV infection and the need to use at least a third generation assay in testing centres for early detection of HIV infection.

ystic lymphangioma is a developmental malformation of the lymphatic system. As they develop in the body surface, 90% of all lymphangiomas are found by 2 years of age. 1 However, those developing in the mediastinum, which account for less than 1%, are mostly asymptomatic and are usually found accidentally in adulthood. 2 We report here a rare case of isolated mediastinal cystic lymphangioma in a 3-year-old child.