Parietal lobe: Tumors here may result in poor interpretation of languages, difficulty with speaking, writing, drawing, naming, and recognizing, and poor spatial and visual perception. Occipital lobe: Damage to this lobe may result in poor vision or loss of vision. Cerebellum: Tumors in this area may cause poor balance, muscle movement, and posture. Brain stem: Tumors on the brainstem can cause seizures, endocrine problems, respiratory changes, visual changes, headaches and partial paralysis. Behavior changes
A persons personality may be altered due to the tumor damaging lobes of the brain. Since the frontal, temporal, and parietal lobes control inhibition, emotions, mood, judgement, reasoning, and behavior, a tumor in those regions can cause inappropriate social behavior, temper tantrums, laughing at things which merit no laughter, and even psychological symptoms such as depression and anxiety. More research is needed into the effectiveness and safety of medication for depression in people with brain tumors.Personality changes can have damaging effects such as unemployment, unstable relationships, and a lack of control. Cause
Epidemiological studies are required to determine risk factors. Aside from exposure to vinyl chloride or ionizing radiation, there are no known environmental factors associated with brain tumors. Mutations and deletions of tumor suppressor genes, such as P53, are thought to be the cause of some forms of brain tumor. Inherited conditions, such as Von Hippel–Lindau disease, tuberous sclerosis, multiple endocrine neoplasia, and neurofibromatosis type 2 carry a high risk for the development of brain tumors. People with celiac disease have a slightly increased risk of developing brain tumors.
Platinosis is an allergy-like reaction to exposure to soluble salts of platinum. The symptoms of platinosis may include asthma, dermatitis, dyspnea, conjunctival vasodilatation, and rhinopharyngitis. The symptoms are progressive, sometimes taking months to years to appear. Platinosis is usually associated with workers in industries related to platinum production. The effects are permanent. Halogeno-platinum compounds are among the most potent respiratory and skin sensitisers known, therefore it is vital that exposure via the skin and by breathing contaminated air is carefully controlled. In practice, the compounds mainly responsible for platinum sensitisation are typically the soluble, ionic, platinum-chloro compounds such as ammonium hexachloroplatinate and tetrachloroplatinate, and hexachloroplatinic acid. Other ionic halogeno compounds are also sensitisers, the order of allergenicity being Cl > Br > I. Neutral compounds such as cis-platin and ammine and nitro complexes such as [Pt(NH3)4]Cl2, K2[Pt(NO2)4] and platinum nitrate are not considered to be allergenic; neither is the metal. See also
Heavy metal poisoning

References
Parrot, Jl; Hébert, R; Saindelle, A; Ruff, F (Nov 1969). "Platinum and platinosis. Allergy and histamine release due to some platinum salts". Archives of Environmental Health. 19 (5): 685–91. doi:10.1080/00039896.1969.10666910. PMID 4187030. Saindelle, A; Ruff, F; Hébert, R; Parrot, Jl (Oct 1968). "A new histamine liberator: chloroplatinate. An occupational allergy: platinosis" [A new histamine liberator: chloroplatinate. An occupational allergy: platinosis]. Revue Française dAllergologie (in French). 8 (4): 205–14. doi:10.1016/S0370-4688(68)80018-3. PMID 4180839. Parrot, Jl; Saindelle, A; Ruff, F (Dec 1967). "Platinum and platinosis. Histamine release by some platinum salts and platinum allergy" [Platinum and platinosis.