A - Z Test List

Test List: L

# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

For reference ranges related to any specific test, please email refranges@hslpathology.com

Please note this list may not show our full repertoire of tests. If you need further information, please call +44 (0) 20 7307 9400

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Lactate (Plasma)

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)

Sample Reqs

B

Special Instructions

Lactate Pyurvate Ratio

Sample Reqs

J [1]

Special Instructions

[1] Contact the laboratory for special sample tubes/containers/instructions.

Lactose Intolerance Gene

Sample Reqs

A

Special Instructions

Lactose Tolerance Test

Sample Reqs

By appointment only

Special Instructions

Collection time (minutes post-glucose): Contact 020 7025 7997 (Phlebotomy)

Lamotrigine

Sample Reqs

B [4]

Special Instructions

[4] Send to the laboratory without delay.

Langer-Giedion Syndrome – BOBs (5 days) + karyotype (15 days)

Sample Reqs

CVS / AF / A
H
[9]

Special Instructions

[9] Clinical history must be provided.

Langer-Giedion Syndrome – BOBs only

Sample Reqs

CVS / AF / A
[9]

Special Instructions

[9] Clinical history must be provided.

Latex Components

Sample Reqs

B

Special Instructions

LDH lsoenzymes

Sample Reqs

B

Special Instructions

LDL7 Subfractions

Sample Reqs

B

Special Instructions

Lead (Blood)

Sample Reqs

A

Special Instructions

Lead (Urine)

Sample Reqs

RU

Special Instructions

Lead Profile (Hb, ZPP, Lead)

Sample Reqs

A [13]

Special Instructions

[13] Protect from light.

Leber’s Congenital Amaurosis NGS Panel – full sequencing across 32 genes

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

Sample Reqs

A
[9]

Special Instructions

[9] Clinical history must be provided.

Legionella Antibodies

Sample Reqs

B

Special Instructions

Legionella Urine Antigen

Sample Reqs

RU

Special Instructions

Leigh Syndrome NGS Panel – full sequencing across 78 genes + deletions/duplications + mitochondrial DNA

Sample Reqs

A
A
[9]

Special Instructions

[9] Clinical history must be provided.

Leishmania Antibodies

Sample Reqs

B

Special Instructions

LEOPARD/Noonan/Cardio-Facio-Cutaneous/Costello Syndromes NGS Panel – full sequencing across 20 genes

Sample Reqs

A
A
[9]

Special Instructions

[9] Clinical history must be provided.

Leptin

Sample Reqs

B [19]

Special Instructions

[19] Must include patient’s age, height and weight.

Leptospirosis (Weil’s Disease) Abs (IgM)

Sample Reqs

B

Special Instructions

Leucine Amino Peptidase

Sample Reqs

B

Special Instructions

Leucocyte Antibody Detection Panel FEMALE

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

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)

Sample Reqs

A

Special Instructions

Leukaemia Immunophenotyping

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

Sample Reqs

CU (Frozen)

Special Instructions

Levetiracetam (Keppra)

Sample Reqs

B [4]

Special Instructions

[4] Send to the laboratory without delay.

Li-Fraumeni Syndrome (p53-related cancer predisposition) – TP53 sequencing + MLPA

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

Sample Reqs

A
A
[9]

Special Instructions

[9] Clinical history must be provided.

Lipase

Sample Reqs

B

Special Instructions

Lipid Profile

Profile details

Triglycerides

Cholesterol

HDL Cholesterol

LDL Cholesterol

Non-HDL Cholesterol

Sample Reqs

B

Special Instructions

 

Lipid Transfer Proteins

Sample Reqs

B

Special Instructions

Lipocalins

Sample Reqs

B

Special Instructions

Lipoprotein (a)

Sample Reqs

B

Special Instructions

Lipoprotein Electrophoresis

Sample Reqs

B

Special Instructions

Lissencephaly NGS Panel – full sequencing across 14 genes

Sample Reqs

A
A
[9]

Special Instructions

[9] Clinical history must be provided.

Listeria Antibody

Sample Reqs

B

Special Instructions

Lithium (take 12 hours after dose)

Sample Reqs

B

Special Instructions

Liver Fibrosis (Enhanced Liver Fibrosis ELF)

Sample Reqs

B

Special Instructions

Liver Fibrosis Fibrotest

Sample Reqs

B

Special Instructions

Liver Function Tests

Profile details

Bilirubin

ALT

AST

Total Protein

Alkaline Phos

Albumin

Globulin

Gamma-GT

Sample Reqs

B

Special Instructions

 

Liver Immunoblot

Sample Reqs

B

Special Instructions

Liver Kidney Microsomal Antibodies

Sample Reqs

B

Special Instructions

Loeys-Dietz Syndrome/Marfan Syndrome/Aortopathy NGS Panel – full sequencing across 26 genes

Sample Reqs

A
A
[9]

Special Instructions

[9] Clinical history must be provided.

Long-QT Syndrome / Brugada Syndrome – full sequencing across 34 genes

Sample Reqs

A
A
[9]

Special Instructions

[9] Clinical history must be provided.

Lorazepam

Sample Reqs

A [4]

Special Instructions

[4] Send to the laboratory without delay.

Lowe (Oculocerebrorenal) Syndrome – OCRL sequencing + large deletions

Sample Reqs

A
[9]

Special Instructions

[9] Clinical history must be provided.

Lp-PLA2 (PLAC) Test

Sample Reqs

B

Special Instructions

LSD

Sample Reqs

RU

Special Instructions

Lung – Biopsy: Lung Biopsy

Sample Reqs

Special Instructions

Lung – Resections: Lung Lesion Small Wedge Resection

Sample Reqs

Special Instructions

Lung – Resections: Lung Resection

Sample Reqs

Special Instructions

Lung – Resections: Lung Tumour Resection +/- Nodes

Sample Reqs

Special Instructions

Lung Disorders NGS Panel – full sequencing across 51 genes

Sample Reqs

A
A
[9]

Special Instructions

[9] Clinical history must be provided.

Lupus Anticoagulant and Anticardiolipin Abs

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

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

Sample Reqs

B [13]

Special Instructions

[13] Protect from light.

Luteinising Hormone (LH)

Sample Reqs

B

Special Instructions

Lycopene

Sample Reqs

B

Special Instructions

Lyme Disease (Borrelia Abs) IgG, IgM

Sample Reqs

B [9] [14]

Special Instructions

[9] Clinical history must be provided.
[14] Provide details of travel history.

Lyme Disease (Borrelia Abs) IgM

Sample Reqs

B

Special Instructions

Lymphocyte Subsets (CD3/CD4/CD8)

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)

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

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

Sample Reqs

A
A
[9]

Special Instructions

[9] Clinical history must be provided.

Lysosomal Enzyme Screen

Sample Reqs

H H [6]

Special Instructions

[6] Contact the Referrals Department before taking and sending sample to the laboratory.

Lysozyme

Sample Reqs

B

Special Instructions

HSL is a partnership between The Doctors Laboratory, Royal Free London NHS Foundation Trust (the Royal Free London) and University College London Hospitals NHS Foundation Trust (UCLH)

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