To calculate the dose distributions of 6 MeV photon beam at variable depth
in 3D water phantom the MCNP4C2 code was used, and the simulated dose
profile was compared with that of the treatment planning computer system
(TPS), and a good agreement w
as found between them.
In conclusion, the MCNP4C2 code package presents a good tool adaptable
to get dose distributions for the 6MeV photon beam and it can be considered as
confirmed method for patient dose calculations.
Objective: Neck dissection remains the standard method of treating cervical
metastasis from head and neck squamous cell carcinoma. We reviewed our experience
with radical and modified RND (MRND) plus radiotherapy as treatment for N2/N3 neck
diseas
e in head and neck squamous cell carcinoma.
Methods we retrospectively reviewed our clinical records from july 2010 to june
2014 identify 43 neck dissections in 39 patients who were found to have N2 or N3 neck
disease treated primarily by neck dissection and postoperative radiotherapy. All patients
had head and neck squamous cell carcinoma with a minimum follow up of 24 months.
Conclusions the combination of RND or MRND and radiotherapy is effective in
controlling neck disease in the absence of persistent or recurrent local disease. MRND
supports preservation of the spinal nerve whenever oncologically feasible.
Larynx cancer is the most common cancer of the head and neck with the exception of
the skin and it accounts for 2% of all cancer diagnoses, its genesis is directly associated
with alcohol drinking and smoking, squamous cell carcinoma (SCC) is the m
ost common
histological type (95%) of larynx cancer.
Aim: The purpose of this study was to evaluate 3D conformal radiotherapy of accelerated
system for early larynx cancer and to estimate acute and late toxicity which appear because
of irradiated normal tissues around the tumor (thyroid gland, spine cord, ….) and also to
evaluate the rate of recurrence and survival.
Materials and methods: The study was performed of 44 patients of scc larengeal cancer
stage T1/T2, that underwent RT (2015 – 2017), 84% with glottic cancer, the median age
was 63 years, all patients were treated 3D conformal RT, Total dose between (60-66) Gy,
2Gy/fraction (5 fractions in week).Our analysis was to evaluate the acute and late toxicity
dure and after radiotherapy, and also the rate of recurrence and survival.
Results: The most toxicity was dysphagia (42 PTs) 96%, radiodermitis (30 PTs) 70%, the
least toxicity was tooth damage. No evidence of late toxicity, the rate of recurrence (11
PTs) 25%, metastases occur in (1 PT). (6/ 41 PTs) 16.4% were dead.
Conclusion: Radiotherapy is the important role to control early larynx cancer, and 3DRadiotherapy
is giving a large dose to treat the tumor and save the normal tissues around
the tumor from effect of radiation, therefor absence the late toxicity.
