Test List: L
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Lactate (Plasma)
Code
LACT
Sample Reqs
G [16]
Special Instructions
[16] Lactate
Sample: Fluoride oxalate plasma only.
On ice and separate from cells 15-30 mins, analyse promptly. Handle with care as sweat contains large amounts of lactate. No tourniquet.
Patient: Rest 30 mins prior to test.
Lactate Dehydrogenase (LDH)
Code
LDH
Sample Reqs
B
Special Instructions
Lactate Pyurvate Ratio
Code
LPR
Sample Reqs
J [1]
Special Instructions
[1] Contact the laboratory for special sample tubes/containers/instructions.
Lactose Intolerance Gene
Code
LACG
Sample Reqs
A
Special Instructions
Lactose Tolerance Test
Code
LTT
Sample Reqs
By appointment only
Special Instructions
Collection time (minutes post-glucose): Contact 020 7025 7997 (Phlebotomy)
Lamotrigine
Code
LAMO
Sample Reqs
B [4]
Special Instructions
[4] Send to the laboratory without delay.
Langer-Giedion Syndrome – BOBs (5 days) + karyotype (15 days)
Code
PBOB, KARY
Sample Reqs
CVS / AF / A
H
[9]
Special Instructions
[9] Clinical history must be provided.
Langer-Giedion Syndrome – BOBs only
Code
PBOB
Sample Reqs
CVS / AF / A
[9]
Special Instructions
[9] Clinical history must be provided.
Latex Components
Code
ZZ13
Sample Reqs
B
Special Instructions
LDH lsoenzymes
Code
ISOL
Sample Reqs
B
Special Instructions
LDL7 Subfractions
Code
LDL7
Sample Reqs
B
Special Instructions
Lead (Blood)
Code
LEAD
Sample Reqs
A
Special Instructions
Lead (Urine)
Code
URPB
Sample Reqs
RU
Special Instructions
Lead Profile (Hb, ZPP, Lead)
Code
LEAZ
Sample Reqs
A [13]
Special Instructions
[13] Protect from light.
Leber’s Congenital Amaurosis NGS Panel – full sequencing across 32 genes
Code
GENE
Sample Reqs
A
A
[9]
Special Instructions
[9] Clinical history must be provided.
Lebers Hereditary Optic Neuropathy – m.3460G>A + m.11778G>A + m.14484T>C common mutations
Code
GENE
Sample Reqs
A
[9]
Special Instructions
[9] Clinical history must be provided.
Legionella Antibodies
Code
LEGO
Sample Reqs
B
Special Instructions
Legionella Urine Antigen
Code
LEGA
Sample Reqs
RU
Special Instructions
Leigh Syndrome NGS Panel – full sequencing across 78 genes + deletions/duplications + mitochondrial DNA
Code
GENE
Sample Reqs
A
A
[9]
Special Instructions
[9] Clinical history must be provided.
Leishmania Antibodies
Code
LEIS
Sample Reqs
B
Special Instructions
LEOPARD/Noonan/Cardio-Facio-Cutaneous/Costello Syndromes NGS Panel – full sequencing across 20 genes
Code
GENE
Sample Reqs
A
A
[9]
Special Instructions
[9] Clinical history must be provided.
Leptin
Code
LEPT
Sample Reqs
B [19]
Special Instructions
[19] Must include patient’s age, height and weight.
Leptospirosis (Weil’s Disease) Abs (IgM)
Code
LEP
Sample Reqs
B
Special Instructions
Leucine Amino Peptidase
Code
LAP
Sample Reqs
B
Special Instructions
Leucocyte Antibody Detection Panel FEMALE
Code
8RF
Sample Reqs
B
Special Instructions
Patients who have samples taken at TDL’s Patient Reception at 76 Wimpole Street may attend any time during hours of opening on Mondays or Tuesdays, and by NOON on Wednesdays to allow for same day shipping to Chicago by Fed Ex. Samples for Rosalind Franklin are not accepted on Thursdays, Fridays or Saturdays. Fed Ex charges are included in these charges.
Leucocyte Antibody Detection Panel MALE
Code
7RF
Sample Reqs
H H H [3] [4] [6]
Special Instructions
[3] Clinical history essential and protect from light.
[4] Send to the laboratory without delay.
[6] Contact the Referrals Department before taking and sending sample to the laboratory.
Patients who have samples taken at TDL’s Patient Reception at 76 Wimpole Street may attend any time during hours of opening on Mondays or Tuesdays, and by NOON on Wednesdays to allow for same day shipping to Chicago by Fed Ex. Samples for Rosalind Franklin are not accepted on Thursdays, Fridays or Saturdays. Fed Ex charges are included in these charges.
Leukaemia Fusion Gene Screening Assay (Q30)
Code
LMPX
Sample Reqs
A
Special Instructions
Leukaemia Immunophenotyping
Code
LYPT
Sample Reqs
A [4] [5]
Special Instructions
[4] Send to the laboratory without delay.
[5] Do not send sample to the laboratory between Friday noon and Monday morning.
Leukotriene E4
Code
LTE4
Sample Reqs
CU (Frozen)
Special Instructions
Levetiracetam (Keppra)
Code
LEVE
Sample Reqs
B [4]
Special Instructions
[4] Send to the laboratory without delay.
Li-Fraumeni Syndrome (p53-related cancer predisposition) – TP53 sequencing + MLPA
Code
GENE
Sample Reqs
A
[9] [11] Requires patient informed consent
Special Instructions
[9] Clinical history must be provided.
[11] Patient consent required. Consent Form can be found at the back of this guide.
Limb-Girdle Muscular Dystrophy (LGMD) NGS Panel – full sequencing across 34 genes
Code
GENE
Sample Reqs
A
A
[9]
Special Instructions
[9] Clinical history must be provided.
Lipase
Code
LIPA
Sample Reqs
B
Special Instructions
Lipid Profile
Profile details
Triglycerides
Cholesterol
HDL Cholesterol
LDL Cholesterol
Non-HDL Cholesterol
Code
LIPP
Sample Reqs
B
Special Instructions
Lipid Transfer Proteins
Code
ZZ23
Sample Reqs
B
Special Instructions
Lipocalins
Code
ZZ28
Sample Reqs
B
Special Instructions
Lipoprotein (a)
Code
LPOA
Sample Reqs
B
Special Instructions
Lipoprotein Electrophoresis
Code
LEL
Sample Reqs
B
Special Instructions
Lissencephaly NGS Panel – full sequencing across 14 genes
Code
GENE
Sample Reqs
A
A
[9]
Special Instructions
[9] Clinical history must be provided.
Listeria Antibody
Code
LIST
Sample Reqs
B
Special Instructions
Lithium (take 12 hours after dose)
Code
LITH
Sample Reqs
B
Special Instructions
Liver Fibrosis (Enhanced Liver Fibrosis ELF)
Code
ELF
Sample Reqs
B
Special Instructions
Liver Fibrosis Fibrotest
Code
FIBT
Sample Reqs
B
Special Instructions
Liver Function Tests
Profile details
Bilirubin
ALT
AST
Total Protein
Alkaline Phos
Albumin
Globulin
Gamma-GT
Code
LFT
Sample Reqs
B
Special Instructions
Liver Immunoblot
Code
LIV1
Sample Reqs
B
Special Instructions
Liver Kidney Microsomal Antibodies
Code
LKM
Sample Reqs
B
Special Instructions
Loeys-Dietz Syndrome/Marfan Syndrome/Aortopathy NGS Panel – full sequencing across 26 genes
Code
GENE
Sample Reqs
A
A
[9]
Special Instructions
[9] Clinical history must be provided.
Long-QT Syndrome / Brugada Syndrome – full sequencing across 34 genes
Code
GENE
Sample Reqs
A
A
[9]
Special Instructions
[9] Clinical history must be provided.
Lorazepam
Code
LORA
Sample Reqs
A [4]
Special Instructions
[4] Send to the laboratory without delay.
Lowe (Oculocerebrorenal) Syndrome – OCRL sequencing + large deletions
Code
GENE
Sample Reqs
A
[9]
Special Instructions
[9] Clinical history must be provided.
Lp-PLA2 (PLAC) Test
Code
PLA2
Sample Reqs
B
Special Instructions
LSD
Code
LSD
Sample Reqs
RU
Special Instructions
Lung – Biopsy: Lung Biopsy
Code
HIS3
Sample Reqs
Special Instructions
Lung – Resections: Lung Lesion Small Wedge Resection
Code
HIS3
Sample Reqs
Special Instructions
Lung – Resections: Lung Resection
Code
HIS5+HIS5
Sample Reqs
Special Instructions
Lung – Resections: Lung Tumour Resection +/- Nodes
Code
HIS5
Sample Reqs
Special Instructions
Lung Disorders NGS Panel – full sequencing across 51 genes
Code
GENE
Sample Reqs
A
A
[9]
Special Instructions
[9] Clinical history must be provided.
Lupus Anticoagulant and Anticardiolipin Abs
Code
LUPA
Sample Reqs
B C [4] [18]
Special Instructions
[4] Send to the laboratory without delay.
[18] Citrate Samples
Samples should be double spun and separated and frozen within 4-8 hours of sample taking, if a delay is expected with transportation to the laboratory, samples must be transported as frozen.
Lupus Anticoagulant only
Code
LUPC
Sample Reqs
C [18]
Special Instructions
[18] Citrate Samples
Samples should be double spun and separated and frozen within 4-8 hours of sample taking, if a delay is expected with transportation to the laboratory, samples must be transported as frozen.
Lutein
Code
LUTE
Sample Reqs
B [13]
Special Instructions
[13] Protect from light.
Luteinising Hormone (LH)
Code
LH
Sample Reqs
B
Special Instructions
Lycopene
Code
LYCO
Sample Reqs
B
Special Instructions
Lyme Disease (Borrelia Abs) IgG, IgM
Code
BORR
Sample Reqs
B [9] [14]
Special Instructions
[9] Clinical history must be provided.
[14] Provide details of travel history.
Lyme Disease (Borrelia Abs) IgM
Code
BORM
Sample Reqs
B
Special Instructions
Lymphocyte Subsets (CD3/CD4/CD8)
Code
LYSS
Sample Reqs
A [10] / Chex
Special Instructions
[10] Contact the laboratory for special stability tubes for lymphocyte subsets – or take an EDTA sample and ensure same day delivery to the laboratory, Monday to Friday noon (do not send sample between Friday noon and Monday morning).
Lymphogranuloma Venerium (LGV)
Code
LGVP
Sample Reqs
PCR* [42]
Special Instructions
[42] LGV can be added to a positive chlamydia sample using the same swab if requested within 4 days of receipt of result.
* LGV can be added to a positive chlamydia sample using the same swab if requested within 4 days of receipt of result.
Lynch Syndrome (HNPCC) NGS Panel – full sequencing across 18 genes + deletions/duplications
Code
GENE
Sample Reqs
A
A
[9] [11] Requires patient informed consent
Special Instructions
[9] Clinical history must be provided.
[11] Patient consent required. Consent Form can be found at the back of this guide.
Lysosomal Disorders NGS Panel – full sequencing across 106 genes
Code
GENE
Sample Reqs
A
A
[9]
Special Instructions
[9] Clinical history must be provided.
Lysosomal Enzyme Screen
Code
LE
Sample Reqs
H H [6]
Special Instructions
[6] Contact the Referrals Department before taking and sending sample to the laboratory.
Lysozyme
Code
LYSO
Sample Reqs
B