Pilonidal cyst/sinus

Metadata

Name	Pilonidal cyst/sinus (pilonidal)
Category	Skin
Sex
Adult	Yes
UUID	0527be3f-abb0-40c0-a548-71407aa34531
Definition	A hair-containing cyst or sinus, occurring chiefly in the coccygeal region.

Ontologies

MeSH	D010864
SNOMED-CT	432863009
FinnGen	L12_PILONIDALCYST

Key Summary Statistics

Cases from any source

Total	2025
Female (%)	598 (30%)
Male (%)	1427 (70%)

Year first recorded

Cases linked in all UK Biobank sources

Cross-source concordance

Vertical bars correspond to number of cases per source/intersection; horizontal bars to left correspond to total number of cases per source.

Incidence & prevalence

Baseline prevalence stratified by sex

Female	33.36 (29.48,37.24)
Male	99.4 (92.12,106.67)

Incidence stratified by sex

Female	0.49 (0.31,0.68)
Male	1.19 (0.88,1.5)

Incidence stratified by age

Ages 40-44	1.83 (0.98,2.67)
Ages 45-49	0.82 (0.34,1.31)
Ages 50-54	0.96 (0.47,1.44)
Ages 55-59	0.47 (0.16,0.78)
Ages 60-64	0.66 (0.34,0.97)
Ages 65-69	0.71 (0.34,1.08)

Period prevalence

Methods

Comparison with general population

Sex-standardised prevalence from CALIBER study (Kuan et al. 2019)

Population	Ages 40-49	Ages 50-59	Ages 60-69
UK Biobank	108 (98,119)	78 (71,85)	57 (52,63)
CALIBER	120 (118,123)	89 (86,92)	71 (69,74)

Stratified by age and Townsend deprivation status

Deprivation status	Ages 40-49	Ages 50-59	Ages 60-69
Least deprived	102(79,129)	80(65,98)	63(52,75)
Low	107(84,135)	74(59,91)	52(42,64)
Medium	98(76,123)	76(61,93)	54(44,66)
High	127(105,154)	85(70,103)	62(51,75)
Most deprived	106(87,128)	74(60,90)	55(44,68)

Stratified by age and country

Country	Ages 40-49	Ages 50-59	Ages 60-69
England	98(87,109)	76(69,84)	57(51,63)
Scotland	165(129,206)	97(77,121)	66(51,84)
Wales	138(98,188)	60(41,85)	48(33,67)

Definition

UK Biobank field id	Description	Code	Value
41202	Diagnoses - main ICD10	L05	Pilonidal cyst
41204	Diagnoses - secondary ICD10	L05	Pilonidal cyst
41200	Operative procedures - main OPCS4	H59.1	Excision of pilonidal sinus and Z plasty skin flap HFQ
41200	Operative procedures - main OPCS4	H59.2	Excision of pilonidal sinus and skin flap NEC
41200	Operative procedures - main OPCS4	H59.3	Excision of pilonidal sinus and skin graft HFQ
41200	Operative procedures - main OPCS4	H59.4	Excision of pilonidal sinus and suture HFQ
41200	Operative procedures - main OPCS4	H59.8	Other specified excision of pilonidal sinus
41200	Operative procedures - main OPCS4	H59.9	Unspecified excision of pilonidal sinus
41200	Operative procedures - main OPCS4	H60.1	Destruction of pilonidal sinus
41200	Operative procedures - main OPCS4	H60.2	Laying open of pilonidal sinus
41200	Operative procedures - main OPCS4	H60.3	Drainage of pilonidal sinus
41200	Operative procedures - main OPCS4	H60.4	Injection of radiocontrast substance into pilonidal sinus
41200	Operative procedures - main OPCS4	H60.8	Other specified other operations on pilonidal sinus
41200	Operative procedures - main OPCS4	H60.9	Unspecified other operations on pilonidal sinus
41210	Operative procedures - secondary OPCS4	H59.1	H59.1
41210	Operative procedures - secondary OPCS4	H59.2	H59.2
41210	Operative procedures - secondary OPCS4	H59.3	H59.3
41210	Operative procedures - secondary OPCS4	H59.4	H59.4
41210	Operative procedures - secondary OPCS4	H59.8	H59.8
41210	Operative procedures - secondary OPCS4	H59.9	H59.9
41210	Operative procedures - secondary OPCS4	H60.1	H60.1
41210	Operative procedures - secondary OPCS4	H60.2	H60.2
41210	Operative procedures - secondary OPCS4	H60.3	H60.3
41210	Operative procedures - secondary OPCS4	H60.4	H60.4
41210	Operative procedures - secondary OPCS4	H60.8	H60.8
41210	Operative procedures - secondary OPCS4	H60.9	H60.9
40001	Underlying (primary) cause of death: ICD10	L05	Pilonidal cyst
40002	Contributory (secondary) causes of death: ICD10	L05	Pilonidal cyst
42040	GP clinical event records	773B000	Excision of pilonidal sinus and Z plasty skin flap HFQ
42040	GP clinical event records	773B100	Excision of pilonidal sinus and skin flap NEC
42040	GP clinical event records	773B200	Excision of pilonidal sinus and skin graft HFQ
42040	GP clinical event records	773B300	Excision of pilonidal sinus and suture HFQ
42040	GP clinical event records	773B400	Excision of pilonidal sinus NEC
42040	GP clinical event records	773B500	Laying open of track of pilonidal sinus
42040	GP clinical event records	773B.00	Pilonidal sinus operations
42040	GP clinical event records	773B700	Drainage of pilonidal sinus
42040	GP clinical event records	773B800	Injection of radiocontrast substance into pilonidal sinus
42040	GP clinical event records	773B900	Destruction of pilonidal sinus NEC
42040	GP clinical event records	773BA00	Other specified excision of pilonidal sinus
42040	GP clinical event records	773Bx00	Excision of pilonidal sinus NOS
42040	GP clinical event records	773By00	Other specified operation on pilonidal sinus
42040	GP clinical event records	773Bz00	Operation on pilonidal sinus NOS
42040	GP clinical event records	M060.00	Pilonidal cyst with abscess
42040	GP clinical event records	M061.00	Pilonidal cyst with no abscess
42040	GP clinical event records	M062.00	Pilonidal sinus with abscess
42040	GP clinical event records	M063.00	Pilonidal sinus without abscess
42040	GP clinical event records	M06..00	Pilonidal sinus/cyst
42040	GP clinical event records	M06z.00	Pilonidal sinus/cyst NOS
42040	GP clinical event records	XE1Ae	Pilonidal cyst with no abscess