Table 1.

Summary of unusual findings in reported cases of eosinophilic granuloma affecting the parietal bone as reported in the literature.

Year	Gender	Age/years	Presentation				Radiographic findings
			Mass	Duration	Trauma	Symptoms
1970 [14]	Female	38	Tender	3 months	No	Seizure activity on EEG	Large irregular osteolytic defect
1973 [15]	Male	5	Smooth, non-tender	–	No	None	Circular localized area of destruction with clear cut margins
1990 [16]	Male	2	Soft and tender with smooth surfaces	1 month	No	None	Soft tissue masses with destruction in the frontal and right parietal areas
1990 [16]	Male	2	Soft, painless	1 month	No	None	Punched-out and well-defined lytic lesion
2006 [6]	Female	26	Tender and firm	2 weeks	No	Progressive headache and nausea	Hyperintense osteolytic lesion
2007 [17]	Male	32	Edematous	–	Yes/3 years	Headache	Hypointense lesion with perilesional edema
2007 [18]	Male	37	Soft tissue	2 months	No	Headache and epileptic attacks	Osteolytic lesion with a large epidural and subcutaneous mass
2009 [19]	Female	36	Tender	2 months	No	Headache	Single punched out area of bone destruction with sharp margins
2010 [20]	Male	10	Tender	1 months	No	None	Lytic bone lesion extended as swelling with extradural hematoma
2011 [21]	Male	4	Large and gradually decreasing in size	1 month	Yes/1 month	Unremitting headache and projectile vomiting	Lytic lesion, scalp swelling and hematoma
2013 [22]	Female	14	Tender and soft	1 month	No	Headache, malaise and nausea	Osteolytic change with extracranial swelling
2013 [23]	Male	44	Immobile palpable masses	–	No	Multiple cranial swellings accompanied by pain	Radiolucent areas in the right frontoparietal, parietal and temporal bones
2016 [24]	Male	7	Non-tender	2 months	No	Progressive headache, decreased level of consciousness and vomiting	Heterogeneous osteolytic mass with extradural hematoma
2018 [25]	Female	8	No mass was felt	6 weeks	No	Focal pain at the scalp	Large osteolytic defect with non-sclerotic margins and beveled edges.
2019 [26]	Female	10	Tender	3 weeks	Yes/2 weeks	None	Single osteolytic lesion without sclerosis
2020 [13]	Male	3	Non-tender	2 days	No	Recurrent and progressive vomiting and drowsiness	Iso-dense subcutaneous scalp lesion, underlying osteolytic bony defect and mixed density extradural lesion with extradural hematoma
2021 [27]	Female	18	Tender	3 weeks	No	Headache	Lytic lesion with disruption of the external tabula and an epicranial soft tissue extension of the lesion
2021 [28]	Male	10	Non-tender and gradually increasing in size	–	Yes	Pain in the local area of the swelling	3 cm sized defect in the right temporoparietal calvarial with scalloped margin
2022	Female	8	Non-Tender	4 months	No	Offensive odor with mild headache	Lytic bone lesion extended as swelling